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Metered Electricity Generation October 2023

Key Findings

Renewable fuels produced 42% of metered electricity in October 2023, but more fossil fuels were used to meet peak evening demand

Online ISSN: 2990-8183

CSO statistical publication, 22 December 2023, 11am

Key Findings

Natural Gas and Wind produced 84% of metered electricity generation in October 2023 (See Table 1A and Figure 2).
In October 2023, 42% of metered electricity came from renewable sources (See Table 1A).
A higher proportion of fossil fuels was used during peak electricity demand periods (See Table 4E).
Metered electricity generation from solar farms increased from 20,120 megawatt-hours (MWh) in 2022 to 405,779 MWh for January to October 2023 (See Table 2).
The monthly half-hourly period in October with the lowest metered electricity generation was 37,377 MWh between 3:30am and 4am (See Table 4A).
The monthly half-hourly evening period in October with the highest metered electricity generation figure was between 6:30pm and 7pm when it was 59,963 MWh (See Table 4A).
In October 2023, the half-hourly periods between 2am and 4:30am were when the highest monthly proportion of renewable metered electricity was generated at 47% (See Table 4E).
In October 2023, the half-hourly periods between 7:30am and 9:30am and between 5:30pm and 7pm were when the lowest monthly renewable fuel share at 37% was recorded (See Table 4E).

Statistician's Comment

The Central Statistics Office (CSO) has today (22 December 2023) published Metered Electricity Generation for October 2023.

Commenting on the release Dympna Corry, Statistician in the Environment and Climate Division, said: "This is the first time that the CSO has published this report. The data show the amount of metered electricity generated in each half-hour period classified by the main fuel used in each power plant to generate the electricity. The release shows how the proportion of renewable fuels (wind, solar, renewable hydro, and other renewable) varied throughout the day and that a higher proportion of fossil fuels was required to meet peak electricity demand in the evening.”

Monthly and Year-to-date Peak Demand

For the cumulative January to October 2023 10-months, peak electricity demand exceeded 600,000 megawatt-hours (MWh) in four half-hourly periods (See Table 4A and Figure 1). These four periods all occurred between 5:30pm and 7:30pm The highest 30-minute period over the aggregated 10 months was between 6pm and 6:30pm. The time period with the highest half-hourly generation within a single month was in January 2023 when 73,791 MWh were generated between 5:30pm and 6pm.

Monthly Renewable Share

The lowest monthly half-hourly proportion of renewable metered electricity during January to October 2023 was 23% (See Table 4E). This renewable share occurred for the month of May between 7:30am and 8:30am and also in June between 8:30pm and 9:30pm.

The monthly half-hourly periods in 2023 with the highest proportions of renewable metered electricity generation were between 3am and 4:30am in January when the share was 53% (See Table 4E).

Solar Farms

Metered electricity generated from solar farms increased from 20,120 MWh in 2022 to 405,779 MWh for the first 10 months of 2023 (See Table 2). June was the month with most generation from solar farms with 68,120 MWh. Only gas (1,358,163 MWh), Wind (552,350 MWh), and Coal (99,594 MWh) generated more electricity during June 2023.

Electricity generated from solar farms by month and half-hourly period for January to October 2023 is given in Table 4C. The data form a pattern covering a longer period of the day as the year progresses from January to June and then a shorter period of the day as we progress towards December.

The monthly half-hourly period with the highest amount of metered electricity generated from solar farms during January to October 2023 occurred between 2pm and 2:30pm in May with a monthly figure of 3,505 MWh for that 30-minute period (See Table 4C).

Electricity generated by households and enterprises, primarily for own consumption, is not included in this release (e.g. household rooftop panels).

Renewable Hydro

The annual trend in metered electricity generated from rivers for 2020 to October 2023 is shown in Table 2. There was 928,144 MWh of metered electricity by renewable hydro in 2020. For the first 10 months of 2023, there were 696,504 MWh generated.

In 2023, January was the month with the highest generation at 120,910 MWh (See Table 1B).

For the first 10 months of 2023, renewable hydro was the fourth highest fuel source for metered electricity generation (See Table 2).

Renewable hydro generation exceeded that of solar farms during January to April and for August to October (See Table 1B).

Coal

Table 2 shows that electricity generated from coal rose from 723,440 MWh in 2020 to 2.8 million MWh in 2021 and 2.5 million MWh in 2022. The January to October 2023 generation was 999,970 MWh.

Natural Gas and Wind

Natural Gas and Wind dominate the generation of electricity. They often move in opposite directions so that on days where a high proportion of electricity is generated from wind, there is a substantial decrease in the amount generated from natural gas. In October 2023 gas accounted for 48% of metered electricity generation while wind made up 36% (See Table 1A). The overall rates for January to October 2023 were 49% for gas and 37% for wind (See Table 2).

Meteorological Conditions affect Generation from Renewables

More metered electricity is generated from wind in winter months (See Table 4B and Figure 4). Generation by solar farms was highest in June 2023 at 68,120 MWh (See Table 4C). There were 120,910 MWh generated from Renewable Hydro in January 2023. This was the highest month so far in 2023.

Exports and Imports of Electricity

Imports exceeded exports in 2021, 2022, and for the year-to-date for 2023 (See Tables 6A and 6B). For January to October 2023, 369,920 MWh were exported which was well below the 2022 figures on a month by month basis. There has been a sharp increase in imports of electricity in 2023 with the January to October total of 3.1 million MWh being almost double the full year 2022 figure.

Editor's Note

The data for this release was received from EirGrid, the operator of the national grid. EirGrid compile a monthly summary report showing the amount of electricity generated by primary fuel source. There are small differences between the figures published by EirGrid and this release mainly due to the timing of revisions from generation plants and the replacement of estimates with actual figures.

The data are available on the CSO website PxStat database at an aggregated primary fuel category level classified by each daily half-hourly period.

Please see the Background Notes for more specific comments on the methodology.

Half-hourly Generation Trends During October

Figure 1 shows that metered electricity generation in October 2023 increased in the morning from around 5am to 10am. It was highest in the evening from around 4pm to 7.30pm.

Table 1A shows that 2.4 million MWh of metered electricity was generated in October 2023 which was 12.7% lower than the October 2022 figure of 2.7 million MWh.

	2020	2021	2022	2023
00:00-00:30	573669	559393	584890	448459
00:30-01:00	567069	556078	581774	440699
01:00-01:30	560981	551880	575653	432264
01:30-02:00	547217	536887	558593	423626
02:00-02:30	540277	532882	556135	418805
02:30-03:00	530586	522045	547581	407706
03:00-03:30	530774	522755	550903	406494
03:30-04:00	528179	517303	545171	400793
04:00-04:30	538450	526515	553382	409045
04:30-05:00	544148	531371	557620	409051
05:00-05:30	565619	549884	577637	428829
05:30-06:00	576468	560862	597540	441550
06:00-06:30	596117	580796	629067	465129
06:30-07:00	615335	605283	657782	484799
07:00-07:30	638219	626509	681544	504941
07:30-08:00	658210	647180	701489	527455
08:00-08:30	669859	662188	707189	534737
08:30-09:00	677001	672425	713177	544794
09:00-09:30	682545	673616	714031	548141
09:30-10:00	687338	673593	714756	549374
10:00-10:30	691210	676013	716257	548057
10:30-11:00	695673	678232	716521	547136
11:00-11:30	704959	682978	719843	551278
11:30-12:00	709242	684535	719270	550766
12:00-12:30	710676	685104	720968	553833
12:30-13:00	702219	677769	715479	552745
13:00-13:30	698661	675280	717804	550823
13:30-14:00	690149	665191	711181	540421
14:00-14:30	692053	665024	715665	543407
14:30-15:00	693895	666460	718716	539587
15:00-15:30	701792	674375	727018	545488
15:30-16:00	720538	694851	743919	551975
16:00-16:30	736291	712438	759537	564731
16:30-17:00	761617	740584	782032	584144
17:00-17:30	771818	750444	787329	599999
17:30-18:00	772930	754522	788204	610140
18:00-18:30	763842	748431	783411	613125
18:30-19:00	749833	734348	771111	606299
19:00-19:30	740281	724188	764273	602143
19:30-20:00	722124	700144	744761	587261
20:00-20:30	711294	687166	732477	575350
20:30-21:00	690409	660752	707234	560493
21:00-21:30	678356	645819	691495	551327
21:30-22:00	648089	613233	659665	525906
22:00-22:30	624035	597606	637870	510367
22:30-23:00	600755	582339	614070	480279
23:00-23:30	592010	576578	606171	466623
23:30-24:00	577892	563709	589772	454411

Table 1A Metered Electricity Generation by Primary Fuel Category October 2020-2023

Primary Fuel Share in Monthly Metered Electricity Generation

Table 1B and Figure 2 show how the share of metered electricity generation varied by primary fuel source and by month for January to October 2023. The share contributed by gas was the highest in every month varying from 43% in January to 61% in both May and June. Wind accounted for 43% of metered electricity generation in both January and February compared with 25% in both May and June. Solar farms contributed 3% in each of the four months between May and August. The highest share from coal was 5% in both January and September. The share from waste was 2% in each month.

	Battery Storage	Biomass/Peat	Coal	Gas	Renewable Hydro	Hydro Storage	Oil	Solar	Waste	Wind
January	0	1	5	43	4	1	0	0	2	43
February	0	2	3	45	2	1	2	0	1	43
March	0	2	4	46	3	1	1	1	2	40
April	0	2	4	48	3	1	0	1	2	38
May	0	2	4	61	2	0	0	3	2	25
June	0	2	4	61	0	1	0	3	2	25
July	0	0	4	50	3	1	0	3	2	38
August	0	0	3	48	4	1	0	3	2	38
September	0	0	5	49	2	1	0	2	2	37
October	0	2	4	48	4	1	1	2	2	36

Table 1B Metered Electricity Generation by Primary Fuel Category January-October 2023

Primary Fuel Used in Metered Electricity Generation

Table A shows the annual share of selected primary fuels for metered electricity generation for 2020 to 2022 and for the year-to-date in 2023. Gas was used for 48% of generation in 2020. This decreased to 46% in 2021 when there was a substantial increase in the coal share to 9%. Metered electricity generated from solar farms rose from 0.1% in 2022 to 1.6% for the first 10 months of 2023.

Table A Proportion of Metered Electricity Generation by Selected Fuel Types
Period	Gas	Wind	Coal	Renewable Hydro	Solar	Net Generation (MWh)
2020	47.9%	38.8%	2.3%	3.0%	0.0%	31,380,709
2021	45.7%	33.1%	9.1%	2.4%	0.0%	30,527,556
2022	47.5%	35.1%	7.8%	2.2%	0.1%	32,367,967
January - October 2023	49.4%	36.6%	4.0%	2.8%	1.6%	24,694,803

Open in Excel: Metered Electricity Generation October 2023 Table A (XLS 10KB)

Table 2 Metered Electricity Generation by Primary Fuel Category 2020-2023

Daily Metered Electricity Generation

Table 3A shows that there were two days in October 2020, two days in October 2021, and three days in October 2022 when metered electricity generation exceeded 100,000 MWh. In October 2023, the highest daily figure was 95,228 MWh on 17 October.

Table 3B shows that the highest daily metered electricity generation during January to October 2023 occurred on 09 March when it was 113,205 MWh. The lowest daily figure for January to October was 54,644 MWh on 02 July.

Table 3A Metered Electricity Generation for All Fuels by Day October 2020-2023

Table 3B Metered Electricity Generation for All Fuels by Day January-October 2023

Table 3B Metered Electricity Generation for All Fuels by Day January-October 2023
Megawatt hours (MWh)
Day	January	February	March	April	May	June	July	August	September	October
1	74,479	96,493	81,851	84,446	70,506	73,246	66,611	78,693	72,356	66,074
2	91,242	99,621	81,796	70,648	81,438	69,383	54,644	76,982	63,988	74,027
3	95,972	88,107	82,203	94,325	91,122	66,219	65,875	74,181	64,458	75,146
4	95,589	86,207	81,333	97,493	79,375	61,406	78,820	75,957	75,236	84,110
5	93,957	78,760	80,785	84,350	75,187	70,008	75,637	77,856	81,324	90,491
6	89,256	94,009	90,810	79,516	67,902	74,810	88,959	57,845	83,331	82,555
7	91,284	85,130	92,088	91,010	78,277	74,580	85,215	64,221	78,194	68,883
8	82,971	105,069	104,958	88,506	74,890	75,862	78,908	71,130	76,795	66,117
9	98,961	92,086	113,205	84,354	84,029	77,769	66,036	80,905	67,645	75,334
10	101,417	100,608	88,972	70,640	93,397	67,603	77,334	83,814	64,713	79,559
11	96,990	90,138	101,670	84,058	97,329	64,127	75,805	84,765	72,880	74,282
12	100,298	90,101	80,262	99,386	80,820	71,744	71,694	74,495	76,479	76,523
13	95,315	105,537	94,539	83,597	67,875	73,852	70,074	61,936	83,169	72,651
14	86,012	112,119	91,793	85,997	74,858	71,615	76,379	72,405	72,678	66,678
15	84,579	94,431	103,764	75,720	73,502	71,032	71,162	71,737	78,153	68,708
16	87,398	97,127	98,188	70,769	73,061	81,891	60,084	72,771	73,321	83,512
17	102,952	100,721	85,130	82,749	76,622	68,005	75,923	76,105	62,307	95,228
18	108,163	90,180	80,889	81,387	79,133	64,994	90,968	84,528	74,580	84,980
19	90,265	81,857	86,062	84,426	75,384	76,576	87,270	81,833	88,082	76,244
20	98,167	91,139	100,648	86,348	70,116	81,057	83,064	79,861	77,260	78,379
21	92,967	102,080	101,631	87,476	65,688	79,663	83,344	91,926	70,367	68,209
22	90,251	104,750	94,526	72,687	77,522	81,908	75,384	80,155	83,741	73,910
23	92,061	89,386	89,515	67,095	71,748	87,576	66,014	76,891	82,275	81,537
24	94,317	91,171	95,339	84,917	73,079	75,633	72,049	76,129	74,187	75,511
25	99,675	77,520	78,147	88,464	71,834	68,849	71,764	79,604	86,605	87,347
26	88,005	80,478	73,975	90,929	68,462	68,999	82,450	77,322	82,336	79,385
27	87,888	84,787	92,335	90,134	62,124	83,857	75,943	68,352	94,464	78,797
28	80,575	81,136	96,887	84,018	61,437	83,187	84,341	68,764	82,079	68,070
29	87,531		97,360	75,034	68,075	79,767	77,320	80,255	74,575	66,368
30	93,726		89,886	73,631	70,747	81,925	68,079	76,752	83,587	68,914
31	106,996		88,470		67,803		79,369	75,164		82,646
Net Generation	2,879,255	2,590,747	2,819,017	2,494,108	2,323,343	2,227,140	2,336,521	2,353,335	2,301,164	2,370,174

Open in Excel: Metered Electricity Generation October 2023 Table 3B (XLS 14KB)

Fuel Share of Metered Electricity Generation for October 2023

Figure 3 shows the percentage share contributed by selected primary fuels toward metered electricity generation for each half-hourly time period in October. The percentage of metered electricity generated from gas in October was highest at 52% between 7.30am and 9.30am. The percentage share from wind was highest at 41% in the early morning from midnight to 4.30am. Renewable Hydro and Coal contributed around 4% in October across all half-hourly periods. Solar farms contributed an average of 1% during 8.30am to 9am and between 5pm and 6pm during October. This rose to an average of 5% between 11am and 3pm for the month of October. The proportion of metered electricity generated from waste during October was 3% up to 7am, then 2% between 7am and 10pm before increasing to 3% again.

	Coal	Gas	Renewable Hydro	Solar	Waste	Wind
00:00-00:30	4	44	5	0	3	41
00:30-01:00	4	44	5	0	3	41
01:00-01:30	4	44	5	0	3	40
01:30-02:00	4	43	5	0	3	41
02:00-02:30	4	43	5	0	3	41
02:30-03:00	4	43	5	0	3	41
03:00-03:30	4	43	5	0	3	41
03:30-04:00	5	42	5	0	3	41
04:00-04:30	4	43	5	0	3	41
04:30-05:00	4	43	5	0	3	40
05:00-05:30	4	45	5	0	3	40
05:30-06:00	4	45	5	0	3	40
06:00-06:30	4	47	5	0	3	38
06:30-07:00	4	49	4	0	3	37
07:00-07:30	4	51	4	0	2	35
07:30-08:00	4	52	4	0	2	33
08:00-08:30	4	52	4	0	2	32
08:30-09:00	4	52	4	1	2	32
09:00-09:30	4	52	4	2	2	31
09:30-10:00	4	51	4	3	2	31
10:00-10:30	4	51	4	4	2	31
10:30-11:00	4	50	4	4	2	32
11:00-11:30	4	49	4	5	2	32
11:30-12:00	4	49	4	5	2	32
12:00-12:30	4	48	4	5	2	33
12:30-13:00	4	48	4	5	2	34
13:00-13:30	4	47	4	5	2	34
13:30-14:00	4	46	4	5	2	35
14:00-14:30	4	47	4	5	2	35
14:30-15:00	4	46	4	5	2	36
15:00-15:30	4	47	4	4	2	36
15:30-16:00	4	48	4	3	2	36
16:00-16:30	4	49	4	3	2	36
16:30-17:00	4	50	4	2	2	35
17:00-17:30	4	50	4	1	2	34
17:30-18:00	4	50	4	1	2	33
18:00-18:30	4	49	4	0	2	32
18:30-19:00	4	49	4	0	2	33
19:00-19:30	4	48	4	0	2	33
19:30-20:00	4	48	4	0	2	34
20:00-20:30	4	49	4	0	2	35
20:30-21:00	4	49	4	0	2	35
21:00-21:30	4	50	4	0	2	36
21:30-22:00	4	49	4	0	2	36
22:00-22:30	4	48	5	0	3	38
22:30-23:00	4	46	5	0	3	40
23:00-23:30	4	45	5	0	3	40
23:30-24:00	4	44	5	0	3	40

Monthly Metered Electricity Generation by Time Period

Table 4A shows how metered electricity generation for monthly half-hourly periods (all days in a month aggregated) varied during January to October 2023. For the 10 months combined, the four highest half-hourly periods occurred between 5:30pm and 7:30pm. The four lowest half-hourly periods for the total 10 months were between 2:30am and 4:30am.

Table 4A Metered Electricity Generation for All Fuels by Time Period January-October 2023

Table 4A Metered Electricity Generation for All Fuels by Time Period January-October 2023
Megawatt hours (MWh)
All Fuels	January	February	March	April	May	June	July	August	September	October	Year-to-date
00:00-00:30	51,009	47,215	51,231	45,554	42,733	42,038	43,384	42,775	40,921	41,599	448,459
00:30-01:00	51,478	47,499	50,845	44,930	41,124	40,558	41,835	41,323	40,227	40,880	440,699
01:00-01:30	50,447	46,390	48,612	44,498	40,067	39,776	41,060	40,529	40,154	40,733	432,264
01:30-02:00	48,488	44,713	47,356	44,375	39,826	39,155	39,994	40,049	39,512	40,157	423,626
02:00-02:30	47,498	43,678	48,619	43,989	38,687	38,905	39,587	39,715	38,926	39,202	418,805
02:30-03:00	46,346	42,570	47,551	43,060	37,537	37,733	38,291	38,591	37,809	38,217	407,706
03:00-03:30	46,413	42,518	47,493	42,865	37,553	38,038	38,247	37,908	37,543	37,916	406,494
03:30-04:00	45,728	41,642	46,683	42,150	36,967	37,872	37,733	37,515	37,125	37,377	400,793
04:00-04:30	46,139	42,326	47,165	43,203	38,046	38,760	38,503	38,599	38,051	38,253	409,045
04:30-05:00	46,215	42,416	47,328	43,148	37,880	37,923	38,394	38,781	38,377	38,588	409,051
05:00-05:30	48,826	44,671	49,442	45,109	39,496	39,453	39,925	40,698	40,723	40,486	428,829
05:30-06:00	50,162	46,316	51,240	45,959	40,732	40,744	40,864	41,773	42,460	41,298	441,550
06:00-06:30	52,311	49,435	53,948	48,213	43,791	43,034	42,705	43,182	44,794	43,714	465,129
06:30-07:00	54,727	51,299	55,851	50,005	46,518	44,680	44,439	44,458	46,737	46,086	484,799
07:00-07:30	57,695	54,168	58,237	51,775	48,620	45,449	45,518	45,725	48,450	49,305	504,941
07:30-08:00	60,775	56,291	60,908	53,697	50,786	47,331	47,582	47,994	50,266	51,824	527,455
08:00-08:30	61,812	56,575	61,588	54,230	51,856	47,977	48,589	48,848	50,588	52,674	534,737
08:30-09:00	63,436	57,679	62,360	54,941	52,616	48,954	49,953	50,373	51,038	53,444	544,794
09:00-09:30	63,971	57,318	62,692	54,536	53,247	49,465	50,358	51,097	51,509	53,949	548,141
09:30-10:00	64,940	56,986	62,793	54,234	53,235	49,478	50,540	51,504	51,669	53,995	549,374
10:00-10:30	64,943	56,538	62,577	53,995	52,541	49,558	50,551	51,960	51,578	53,816	548,057
10:30-11:00	64,688	56,362	62,584	53,929	52,243	49,275	50,815	52,283	51,360	53,596	547,136
11:00-11:30	65,051	56,864	63,086	54,562	52,174	49,551	51,363	53,138	51,688	53,801	551,278
11:30-12:00	65,379	56,983	63,087	54,670	51,883	49,148	51,235	53,233	51,635	53,515	550,766
12:00-12:30	65,809	57,876	63,782	54,839	52,031	49,158	51,499	53,537	52,090	53,212	553,833
12:30-13:00	65,852	57,697	63,692	54,819	51,737	48,900	51,474	53,440	52,011	53,124	552,745
13:00-13:30	65,512	57,837	63,382	54,985	50,793	48,778	51,812	53,213	51,487	53,024	550,823
13:30-14:00	64,511	57,051	62,129	54,000	49,426	47,649	50,842	52,119	50,532	52,161	540,421
14:00-14:30	65,258	57,545	62,437	53,934	49,482	48,062	51,142	52,269	50,808	52,469	543,407
14:30-15:00	64,916	57,363	62,178	53,444	48,881	47,638	50,866	51,848	50,315	52,137	539,587
15:00-15:30	64,865	57,509	62,211	54,037	49,457	48,565	51,833	52,822	51,212	52,978	545,488
15:30-16:00	66,255	58,274	62,867	54,521	50,354	49,060	52,354	53,254	51,571	53,464	551,975
16:00-16:30	67,978	58,925	63,887	55,408	51,913	50,005	53,695	54,761	52,988	55,171	564,731
16:30-17:00	71,627	61,022	65,943	57,505	54,033	51,547	55,408	56,036	54,040	56,984	584,144
17:00-17:30	73,171	62,486	67,273	59,510	55,342	52,734	57,295	57,436	56,109	58,644	599,999
17:30-18:00	73,791	65,046	68,506	60,774	56,005	53,432	58,332	58,464	56,309	59,483	610,140
18:00-18:30	73,152	65,127	68,749	61,249	56,375	53,891	59,147	59,090	56,559	59,786	613,125
18:30-19:00	70,970	64,136	69,151	60,465	55,880	53,438	58,412	58,192	55,693	59,963	606,299
19:00-19:30	70,524	63,794	68,788	59,702	55,632	52,784	58,557	57,834	55,296	59,233	602,143
19:30-20:00	68,099	61,765	66,768	58,643	54,626	51,470	57,088	56,396	55,011	57,396	587,261
20:00-20:30	66,089	60,510	65,588	57,832	54,205	50,708	55,923	55,415	53,661	55,420	575,350
20:30-21:00	63,737	58,430	63,260	57,308	53,389	49,588	54,462	54,766	52,156	53,395	560,493
21:00-21:30	62,689	57,242	61,765	57,039	53,677	48,933	53,581	53,895	50,493	52,013	551,327
21:30-22:00	59,420	54,272	58,496	53,745	52,449	47,255	51,855	51,532	47,485	49,397	525,906
22:00-22:30	57,244	52,330	56,724	52,060	51,290	47,047	50,898	49,699	45,857	47,215	510,367
22:30-23:00	53,974	49,615	53,541	48,565	47,387	44,998	48,093	46,508	43,215	44,384	480,279
23:00-23:30	53,464	48,879	52,922	46,551	45,177	43,847	46,068	44,854	42,039	42,822	466,623
23:30-24:00	51,871	47,564	51,701	45,547	43,643	42,802	44,420	43,903	41,087	41,874	454,411
Net Generation	2,879,255	2,590,747	2,819,017	2,494,108	2,323,343	2,227,140	2,336,521	2,353,335	2,301,164	2,370,174	24,694,803

Open in Excel: Metered Electricity Generation October 2023 Table 4A (XLS 16KB)

Wind Generation is Highest in Winter

The amount of metered electricity generated from wind farms varies substantially throughout the year. In January 2023, 1.2 million MWh were generated by wind which was twice the amount generated during June (See Table 4B and Figure 4). February was the month with the highest amount of wind generated electricity in each of the years 2020 to 2022 (See Figure 4).

	2020	2021	2022	2023
January	1260839	986100	1023025	1226819
February	1589648	1403381	1549488	1121321
March	1239618	1004358	963955	1139129
April	607100	672878	859288	944095
May	819394	773168	869679	579223
June	775125	627494	741540	552350
July	810722	317264	527659	887836
August	669058	569234	521486	895663
September	804480	540086	654946	859628
October	1192174	961004	1262786	844081
November	1103330	965880	1349075
December	1295945	1268798	1047832

Table 4B Metered Electricity Generation for Wind by Time Period January-October 2023

Table 4B Metered Electricity Generation for Wind by Time Period January-October 2023
Megawatt hours (MWh)
Wind	January	February	March	April	May	June	July	August	September	October	Year-to-date
00:00-00:30	23,361	22,661	22,557	17,961	11,968	10,796	17,529	17,624	14,932	17,001	176,389
00:30-01:00	23,448	22,729	22,139	17,952	11,712	10,821	17,098	17,154	14,678	16,683	174,414
01:00-01:30	23,259	22,147	21,519	17,943	11,492	10,856	17,000	17,094	14,884	16,379	172,573
01:30-02:00	22,500	21,587	21,331	17,999	11,459	10,790	16,525	17,348	14,803	16,315	170,656
02:00-02:30	22,030	21,083	21,777	17,886	11,315	10,774	16,398	17,358	14,987	16,016	169,626
02:30-03:00	21,550	20,420	21,396	17,653	11,219	10,762	16,069	17,021	14,821	15,666	166,578
03:00-03:30	21,788	20,471	21,616	17,607	11,174	11,075	15,941	16,704	14,793	15,473	166,641
03:30-04:00	21,361	20,418	21,542	17,225	11,047	11,147	15,630	16,600	14,733	15,315	165,018
04:00-04:30	21,625	20,682	21,761	17,319	10,983	11,150	15,709	16,595	15,144	15,646	166,614
04:30-05:00	21,517	20,784	21,555	17,068	10,708	10,963	15,339	16,381	15,298	15,612	165,224
05:00-05:30	22,411	21,119	21,618	17,191	10,742	10,913	15,301	16,406	15,953	16,153	167,806
05:30-06:00	23,123	21,587	21,995	17,163	10,631	10,750	15,202	16,165	16,655	16,343	169,613
06:00-06:30	23,458	21,971	22,341	17,322	10,477	10,635	15,301	16,070	17,178	16,623	171,377
06:30-07:00	24,568	22,365	22,682	17,502	10,342	10,480	15,358	16,035	17,478	17,077	173,888
07:00-07:30	25,094	22,866	22,614	17,673	10,009	10,007	15,242	15,999	17,616	17,149	174,269
07:30-08:00	25,476	23,334	22,430	17,416	9,724	9,582	15,056	15,984	17,572	17,004	173,577
08:00-08:30	25,794	23,284	22,311	17,080	9,558	9,392	15,049	15,562	17,280	16,986	172,295
08:30-09:00	26,647	23,094	22,329	17,293	9,705	9,402	15,580	15,662	17,311	16,935	173,959
09:00-09:30	26,978	22,486	22,445	17,651	10,008	9,620	16,318	15,932	17,331	16,717	175,486
09:30-10:00	27,118	22,229	22,568	18,119	10,408	9,777	16,568	16,721	17,582	16,624	177,714
10:00-10:30	27,024	22,438	23,053	18,721	10,704	9,984	17,195	17,300	18,120	16,586	181,125
10:30-11:00	26,941	23,191	23,884	19,363	11,105	10,490	17,520	18,009	18,779	16,908	186,190
11:00-11:30	27,007	24,168	24,415	20,269	11,526	11,041	17,701	18,928	19,434	17,146	191,636
11:30-12:00	27,518	24,908	25,231	21,035	11,976	11,288	17,943	19,555	20,096	17,268	196,819
12:00-12:30	27,604	25,511	25,746	21,795	12,312	11,705	18,479	20,103	20,849	17,429	201,534
12:30-13:00	27,440	25,868	25,966	22,278	12,675	12,260	19,155	20,408	21,213	17,881	205,145
13:00-13:30	27,321	25,869	26,177	22,789	12,928	12,762	19,781	20,679	21,108	18,241	207,655
13:30-14:00	26,963	25,658	26,213	22,790	13,201	13,045	20,296	20,823	20,955	18,221	208,166
14:00-14:30	26,761	25,803	26,548	23,111	13,566	13,289	20,965	21,272	21,022	18,508	210,845
14:30-15:00	26,433	25,701	26,694	23,192	13,901	13,634	21,333	21,340	20,919	18,677	211,824
15:00-15:30	26,670	25,592	26,774	23,521	14,282	14,032	21,930	22,089	21,085	19,160	215,135
15:30-16:00	27,030	25,453	26,609	23,437	14,758	14,008	22,201	22,480	20,878	19,216	216,069
16:00-16:30	27,179	24,965	26,009	23,506	14,882	14,100	22,634	22,989	20,846	19,628	216,739
16:30-17:00	27,352	24,518	25,810	23,811	14,906	14,117	23,225	23,285	20,709	19,872	217,606
17:00-17:30	27,620	24,319	25,519	23,946	14,754	13,778	23,475	23,079	20,245	19,661	216,397
17:30-18:00	27,883	24,265	25,075	23,576	14,417	13,516	23,413	22,572	19,644	19,394	213,754
18:00-18:30	27,822	24,107	24,785	23,044	14,251	13,237	23,188	21,919	18,989	19,347	210,688
18:30-19:00	27,983	23,877	24,794	22,147	14,004	12,876	22,926	21,147	18,492	19,715	207,960
19:00-19:30	28,097	24,166	24,628	21,235	13,444	12,335	22,526	20,444	18,413	19,749	205,035
19:30-20:00	27,731	24,527	24,415	20,236	12,900	11,679	21,633	19,594	18,234	19,564	200,512
20:00-20:30	27,513	24,745	24,249	19,595	12,415	11,174	20,688	19,187	18,054	19,215	196,835
20:30-21:00	27,075	24,534	24,277	19,388	12,142	10,814	19,854	19,010	18,073	18,876	194,043
21:00-21:30	26,889	24,312	24,340	19,101	12,183	10,792	19,490	18,903	17,928	18,506	192,445
21:30-22:00	25,854	23,994	24,152	18,688	12,321	11,130	18,993	18,495	17,502	18,017	189,146
22:00-22:30	25,460	23,735	23,912	18,580	12,436	11,380	18,738	18,334	17,417	17,840	187,832
22:30-23:00	24,915	22,962	23,277	18,213	12,345	11,355	18,405	17,937	16,867	17,536	183,810
23:00-23:30	25,063	22,686	23,105	18,057	12,199	11,432	18,147	17,802	16,625	17,284	182,399
23:30-24:00	24,565	22,134	22,945	17,647	12,010	11,406	17,790	17,565	16,102	16,920	179,084
Net Generation	1,226,819	1,121,321	1,139,129	944,095	579,223	552,350	887,836	895,663	859,628	844,081	9,050,144

Open in Excel: Metered Electricity Generation October 2023 Table 4B (XLS 16KB)

Table 4C Metered Electricity Generation for Solar by Time Period January-October 2023

Table 4C Metered Electricity Generation for Solar by Time Period January-October 2023
Megawatt hours (MWh)
Solar	January	February	March	April	May	June	July	August	September	October	Year-to-date
00:00-00:30	0	0	0	0	0	0	0	0	0	0	0
00:30-01:00	0	0	0	0	0	0	0	0	0	0	0
01:00-01:30	0	0	0	0	0	0	0	0	0	0	0
01:30-02:00	0	0	0	0	0	0	0	0	0	0	0
02:00-02:30	0	0	0	0	0	0	0	0	0	0	0
02:30-03:00	0	0	0	0	0	0	0	0	0	0	0
03:00-03:30	0	0	0	0	0	0	0	0	0	0	0
03:30-04:00	0	0	0	0	0	0	0	0	0	0	0
04:00-04:30	0	0	0	0	0	0	0	0	0	0	0
04:30-05:00	0	0	0	0	0	1	0	0	0	0	1
05:00-05:30	0	0	0	0	6	33	9	0	0	0	48
05:30-06:00	0	0	0	0	54	137	68	3	0	0	262
06:00-06:30	0	0	0	6	170	302	210	44	0	2	735
06:30-07:00	0	0	14	49	378	540	426	175	6	5	1,594
07:00-07:30	0	0	79	154	687	872	715	409	70	13	2,998
07:30-08:00	0	12	207	341	1,044	1,253	1,120	746	262	52	5,037
08:00-08:30	1	72	360	610	1,503	1,702	1,601	1,232	571	213	7,865
08:30-09:00	20	183	514	895	1,983	2,139	2,024	1,687	989	532	10,966
09:00-09:30	73	332	697	1,237	2,344	2,446	2,413	2,131	1,455	947	14,075
09:30-10:00	147	482	868	1,516	2,656	2,664	2,598	2,571	1,930	1,427	16,859
10:00-10:30	234	617	955	1,706	2,919	2,849	2,739	2,813	2,333	1,953	19,116
10:30-11:00	315	739	1,039	1,840	3,076	2,998	2,815	3,042	2,574	2,390	20,827
11:00-11:30	373	797	1,128	1,920	3,234	3,094	3,058	3,150	2,646	2,691	22,092
11:30-12:00	417	858	1,152	1,982	3,349	3,245	3,061	3,074	2,669	2,783	22,590
12:00-12:30	419	867	1,190	2,075	3,271	3,283	3,122	3,185	2,743	2,867	23,023
12:30-13:00	430	845	1,157	2,091	3,363	3,285	3,253	3,227	2,748	2,901	23,301
13:00-13:30	409	841	1,149	2,123	3,429	3,344	3,292	3,204	2,767	2,871	23,429
13:30-14:00	380	815	1,119	2,083	3,455	3,349	3,247	3,160	2,740	2,763	23,110
14:00-14:30	331	752	1,024	2,091	3,505	3,293	3,147	3,170	2,668	2,498	22,479
14:30-15:00	256	644	991	2,118	3,463	3,226	3,042	3,064	2,601	2,352	21,758
15:00-15:30	182	498	918	2,017	3,386	3,126	3,055	2,985	2,524	2,098	20,788
15:30-16:00	104	370	775	1,944	3,234	3,120	2,947	2,894	2,368	1,770	19,525
16:00-16:30	39	253	644	1,757	2,959	3,021	2,750	2,720	2,101	1,389	17,632
16:30-17:00	8	129	503	1,510	2,771	2,920	2,556	2,562	1,894	995	15,847
17:00-17:30	0	41	333	1,352	2,396	2,679	2,430	2,240	1,521	628	13,621
17:30-18:00	0	5	198	1,116	2,143	2,442	2,094	1,824	1,165	333	11,319
18:00-18:30	0	0	96	801	1,748	2,089	1,818	1,496	762	128	8,938
18:30-19:00	0	0	41	538	1,327	1,677	1,445	1,065	400	36	6,528
19:00-19:30	0	0	17	304	883	1,240	1,063	717	155	12	4,391
19:30-20:00	0	0	3	134	533	807	726	390	34	6	2,634
20:00-20:30	0	0	0	34	281	496	460	158	3	2	1,435
20:30-21:00	0	0	0	2	113	298	238	39	1	1	691
21:00-21:30	0	0	0	0	23	128	82	2	0	0	236
21:30-22:00	0	0	0	0	1	22	8	0	0	0	31
22:00-22:30	0	0	0	0	0	0	0	0	0	0	0
22:30-23:00	0	0	0	0	0	0	0	0	0	0	0
23:00-23:30	0	0	0	0	0	0	0	0	0	0	0
23:30-24:00	0	0	0	0	0	0	0	0	0	0	0
Net Generation	4,140	10,150	17,171	36,344	65,690	68,120	63,630	59,179	44,701	36,656	405,779

Open in Excel: Metered Electricity Generation October 2023 Table 4C (XLS 15KB)

Meteorological Conditions Affect Generation From Renewables

Tables 4C and 4D show metered electricity generation by time period and month for January to October 2023 for solar farms and renewable hydro. In 2023, generation by solar farms was highest in June at 68,120 MWh (See Table 4C).

There were 120,910 MWh generated from Renewable Hydro in January 2023 (See Table 4D). This was the highest month so far in 2023. The next highest month was October when there were 101,217 MWh generated.

	Renewable Hydro	Solar	Waste
January	120910	4140	53347
February	54962	10150	38170
March	81583	17171	47352
April	85664	36344	46855
May	40225	65690	55514
June	7704	68120	43810
July	59908	63630	37067
August	89005	59179	56847
September	55325	44701	52547
October	101217	36656	56588

	2020	2021	2022	2023
00:00-00:30	46	40	42	43
00:30-01:00	46	40	42	43
01:00-01:30	47	40	42	43
01:30-02:00	47	41	43	44
02:00-02:30	47	41	43	44
02:30-03:00	47	41	43	45
03:00-03:30	47	41	43	45
03:30-04:00	46	41	43	45
04:00-04:30	46	41	42	44
04:30-05:00	45	40	42	44
05:00-05:30	44	39	41	43
05:30-06:00	43	38	39	42
06:00-06:30	43	37	38	40
06:30-07:00	42	36	37	39
07:00-07:30	41	35	36	38
07:30-08:00	40	34	35	37
08:00-08:30	39	33	34	37
08:30-09:00	39	33	35	37
09:00-09:30	40	33	35	38
09:30-10:00	40	33	35	39
10:00-10:30	40	33	36	40
10:30-11:00	41	34	36	41
11:00-11:30	41	34	37	42
11:30-12:00	41	35	37	43
12:00-12:30	42	35	38	44
12:30-13:00	43	36	39	45
13:00-13:30	43	36	39	45
13:30-14:00	44	37	39	46
14:00-14:30	44	37	39	46
14:30-15:00	43	37	39	47
15:00-15:30	43	36	38	47
15:30-16:00	42	35	37	46
16:00-16:30	41	34	37	45
16:30-17:00	40	33	36	43
17:00-17:30	39	33	35	42
17:30-18:00	39	32	35	40
18:00-18:30	39	32	34	39
18:30-19:00	39	33	35	39
19:00-19:30	39	33	34	38
19:30-20:00	40	34	35	38
20:00-20:30	40	34	35	38
20:30-21:00	41	36	36	38
21:00-21:30	42	36	37	38
21:30-22:00	43	38	38	39
22:00-22:30	45	39	39	40
22:30-23:00	45	39	40	42
23:00-23:30	46	40	41	43
23:30-24:00	46	40	42	43

Table 4D Metered Electricity Generation for Renewable Hydro by Time Period January-October 2023

Table 4D Metered Electricity Generation for Renewable Hydro by Time Period January-October 2023
Megawatt hours (MWh)
Renewable Hydro	January	February	March	April	May	June	July	August	September	October	Year-to-date
00:00-00:30	2,403	859	1,444	1,691	472	32	1,041	1,741	1,083	1,985	12,751
00:30-01:00	2,406	834	1,435	1,642	434	31	1,038	1,722	1,052	1,976	12,570
01:00-01:30	2,398	831	1,354	1,616	417	30	1,042	1,713	1,047	2,046	12,493
01:30-02:00	2,387	829	1,348	1,613	409	26	1,035	1,714	1,058	2,044	12,463
02:00-02:30	2,393	833	1,433	1,608	406	20	1,041	1,713	1,056	1,983	12,486
02:30-03:00	2,393	825	1,428	1,603	402	19	1,037	1,703	1,053	1,972	12,436
03:00-03:30	2,388	826	1,436	1,611	405	19	1,041	1,704	1,058	1,970	12,460
03:30-04:00	2,376	823	1,431	1,603	402	19	1,036	1,703	1,049	1,968	12,411
04:00-04:30	2,382	827	1,425	1,618	416	20	1,041	1,709	1,046	1,975	12,460
04:30-05:00	2,381	827	1,424	1,617	475	20	1,039	1,702	1,043	1,974	12,501
05:00-05:30	2,374	829	1,427	1,629	534	20	1,041	1,710	1,049	1,978	12,591
05:30-06:00	2,368	829	1,427	1,622	574	23	1,041	1,703	1,043	1,970	12,600
06:00-06:30	2,372	859	1,422	1,629	615	58	1,041	1,700	1,047	1,979	12,722
06:30-07:00	2,371	889	1,425	1,631	594	66	1,052	1,693	1,065	1,987	12,772
07:00-07:30	2,384	936	1,455	1,675	616	94	1,087	1,703	1,078	2,004	13,032
07:30-08:00	2,408	987	1,482	1,721	639	118	1,106	1,720	1,085	2,033	13,298
08:00-08:30	2,482	1,116	1,564	1,744	640	131	1,214	1,758	1,135	2,121	13,906
08:30-09:00	2,518	1,168	1,602	1,766	686	155	1,303	1,814	1,134	2,162	14,308
09:00-09:30	2,571	1,197	1,610	1,783	736	191	1,319	1,863	1,157	2,201	14,628
09:30-10:00	2,588	1,209	1,617	1,786	818	252	1,350	1,881	1,161	2,218	14,879
10:00-10:30	2,583	1,243	1,638	1,770	826	246	1,357	1,898	1,154	2,226	14,941
10:30-11:00	2,589	1,274	1,659	1,756	863	263	1,398	1,929	1,157	2,237	15,125
11:00-11:30	2,600	1,294	1,693	1,770	891	266	1,405	1,954	1,179	2,236	15,287
11:30-12:00	2,598	1,275	1,718	1,782	930	267	1,416	1,971	1,171	2,234	15,361
12:00-12:30	2,594	1,304	1,745	1,813	967	277	1,433	1,983	1,181	2,216	15,513
12:30-13:00	2,599	1,294	1,786	1,817	1,005	284	1,455	2,007	1,182	2,174	15,605
13:00-13:30	2,559	1,308	1,833	1,811	1,038	273	1,443	2,020	1,170	2,180	15,635
13:30-14:00	2,550	1,305	1,870	1,802	1,049	256	1,415	2,015	1,167	2,169	15,596
14:00-14:30	2,533	1,317	1,912	1,786	1,060	222	1,405	2,002	1,194	2,170	15,603
14:30-15:00	2,522	1,328	1,947	1,780	1,053	208	1,404	2,004	1,209	2,155	15,612
15:00-15:30	2,573	1,361	1,996	1,795	1,065	200	1,410	2,002	1,236	2,129	15,766
15:30-16:00	2,609	1,404	2,003	1,792	1,075	198	1,442	2,015	1,252	2,125	15,914
16:00-16:30	2,679	1,498	2,036	1,832	1,187	228	1,480	2,031	1,271	2,144	16,385
16:30-17:00	2,707	1,539	2,069	1,860	1,248	258	1,459	2,041	1,284	2,152	16,617
17:00-17:30	2,786	1,617	2,142	1,993	1,324	302	1,432	2,053	1,306	2,203	17,157
17:30-18:00	2,798	1,657	2,179	2,026	1,328	306	1,430	2,063	1,324	2,211	17,323
18:00-18:30	2,786	1,660	2,176	2,055	1,354	316	1,427	2,032	1,312	2,203	17,320
18:30-19:00	2,763	1,647	2,179	2,070	1,358	317	1,399	1,997	1,294	2,208	17,232
19:00-19:30	2,757	1,570	2,103	2,075	1,301	291	1,393	1,959	1,267	2,196	16,913
19:30-20:00	2,728	1,482	2,017	2,065	1,292	280	1,379	1,923	1,250	2,190	16,606
20:00-20:30	2,633	1,292	1,941	2,037	1,258	258	1,361	1,885	1,198	2,164	16,027
20:30-21:00	2,599	1,186	1,895	1,982	1,209	239	1,317	1,851	1,172	2,144	15,593
21:00-21:30	2,474	1,107	1,811	1,954	1,083	190	1,253	1,828	1,140	2,136	14,975
21:30-22:00	2,427	1,034	1,737	1,925	962	140	1,189	1,823	1,145	2,129	14,511
22:00-22:30	2,390	975	1,648	1,867	885	93	1,129	1,792	1,162	2,129	14,068
22:30-23:00	2,374	920	1,574	1,821	772	72	1,106	1,774	1,156	2,095	13,664
23:00-23:30	2,383	890	1,554	1,731	642	64	1,111	1,752	1,155	2,061	13,344
23:30-24:00	2,372	852	1,532	1,689	508	50	1,114	1,734	1,138	2,054	13,044
Net Generation	120,910	54,962	81,583	85,664	40,225	7,704	59,908	89,005	55,325	101,217	696,504

Open in Excel: Metered Electricity Generation October 2023 Table 4D (XLS 15KB)

Renewable Proportion by Time Period and Month

The months with the lowest half-hourly proportion of renewable metered electricity were May 2023 between 7:30am and 8:30am and June between 8:30pm and 9:30pm (See Table 4E). The proportion of renewables for those monthly time periods was 23%.

The highest monthly half-hourly renewable share was 53% in January 2023 between 3am and 4:30am.

Table 4E: Renewable Energy Percentage of Metered Electricity Generation by Time Period and Month October 2023

Table 4E: Renewable Energy Percentage of Metered Electricity Generation by Time Period and Month October 2023
%
Renewable Energy	January	February	March	April	May	June	July	August	September	October
00:00-00:30	51%	50%	47%	44%	30%	26%	44%	46%	40%	46%
00:30-01:00	51%	50%	47%	44%	30%	27%	44%	46%	40%	46%
01:00-01:30	51%	50%	48%	45%	30%	28%	45%	47%	40%	46%
01:30-02:00	52%	51%	48%	45%	31%	28%	45%	48%	41%	46%
02:00-02:30	52%	51%	48%	45%	31%	29%	45%	49%	42%	47%
02:30-03:00	52%	51%	49%	45%	32%	29%	45%	49%	43%	47%
03:00-03:30	53%	51%	49%	46%	32%	30%	45%	49%	43%	47%
03:30-04:00	53%	52%	50%	45%	32%	30%	45%	50%	43%	47%
04:00-04:30	53%	51%	50%	45%	31%	30%	44%	48%	43%	47%
04:30-05:00	52%	52%	49%	44%	30%	30%	43%	47%	43%	46%
05:00-05:30	51%	50%	47%	42%	29%	29%	42%	45%	42%	46%
05:30-06:00	51%	49%	46%	42%	28%	28%	41%	43%	42%	45%
06:00-06:30	50%	47%	45%	40%	26%	26%	39%	42%	41%	43%
06:30-07:00	50%	46%	44%	39%	25%	25%	39%	41%	40%	42%
07:00-07:30	48%	44%	42%	38%	24%	25%	38%	40%	39%	39%
07:30-08:00	46%	44%	40%	37%	23%	24%	37%	39%	38%	37%
08:00-08:30	46%	44%	40%	36%	23%	24%	37%	39%	38%	37%
08:30-09:00	46%	43%	40%	37%	24%	24%	38%	39%	39%	37%
09:00-09:30	47%	42%	40%	38%	25%	25%	40%	40%	39%	37%
09:30-10:00	46%	42%	40%	40%	27%	26%	41%	42%	41%	38%
10:00-10:30	46%	43%	41%	42%	28%	27%	43%	43%	42%	39%
10:30-11:00	47%	45%	43%	43%	29%	28%	43%	44%	44%	41%
11:00-11:30	47%	47%	44%	44%	31%	30%	44%	46%	46%	42%
11:30-12:00	47%	48%	45%	46%	32%	31%	44%	47%	47%	42%
12:00-12:30	47%	48%	45%	47%	32%	32%	45%	48%	48%	43%
12:30-13:00	47%	49%	46%	48%	33%	33%	47%	48%	49%	44%
13:00-13:30	47%	49%	46%	49%	35%	34%	48%	49%	49%	44%
13:30-14:00	47%	49%	47%	50%	36%	36%	50%	50%	50%	45%
14:00-14:30	46%	49%	48%	51%	37%	36%	50%	51%	49%	45%
14:30-15:00	45%	49%	48%	51%	38%	36%	51%	51%	50%	45%
15:00-15:30	46%	48%	48%	51%	38%	36%	51%	52%	49%	45%
15:30-16:00	45%	47%	47%	50%	38%	36%	51%	52%	48%	44%
16:00-16:30	44%	46%	45%	49%	37%	35%	51%	51%	46%	43%
16:30-17:00	42%	43%	43%	48%	36%	34%	50%	50%	45%	41%
17:00-17:30	42%	42%	42%	46%	34%	32%	48%	48%	42%	39%
17:30-18:00	42%	40%	41%	44%	32%	31%	47%	46%	40%	37%
18:00-18:30	42%	40%	40%	43%	31%	30%	45%	44%	38%	37%
18:30-19:00	44%	40%	40%	41%	30%	28%	45%	42%	37%	37%
19:00-19:30	44%	41%	39%	40%	29%	27%	43%	40%	36%	38%
19:30-20:00	45%	43%	40%	39%	28%	25%	42%	39%	36%	38%
20:00-20:30	46%	43%	40%	38%	26%	24%	41%	39%	36%	39%
20:30-21:00	47%	45%	42%	38%	26%	23%	40%	39%	37%	40%
21:00-21:30	47%	45%	43%	37%	25%	23%	39%	39%	38%	40%
21:30-22:00	48%	47%	45%	39%	26%	25%	40%	40%	40%	41%
22:00-22:30	49%	48%	46%	40%	27%	25%	40%	41%	41%	43%
22:30-23:00	51%	49%	47%	42%	28%	26%	41%	43%	42%	45%
23:00-23:30	52%	49%	47%	43%	29%	27%	42%	44%	43%	46%
23:30-24:00	52%	49%	48%	43%	29%	27%	43%	45%	43%	46%
Renewable Energy includes Hydro, Solar, Wind and Other Renewables

Open in Excel: Metered Electricity Generation October 2023 Table 4E (XLS 14KB)

Number of Generation Plants by Primary Fuel

There were around 500 metered electricity generation plants connected to the national grid during January to October 2023 (See Table 5). A power plant was calculated on the basis of its unique identification number. The unique ID is changed when a plant is sold so the same location could be counted more than once. Wind farms account for around 60% of power plants. There was a substantial increase in 2022 when 15 solar farms were connected to the grid.

Table 5 Number of Generation Plants by Primary Fuel Category 2020-2023

Exports and Imports of Electricity

Imports generally exceeded exports during 2020 to 2023 (See Tables 6A and 6B). For January to October 2023, 369,920 MWh were exported. Imports increased considerably in 2023 to 3.1 million MWh for January to October.

	Exports	Imports
2020	1913096	1761447
2021	863329	2450923
2022	1329732	1581628
2023	369920	3105141

Table 6A Exports of Electricity January 2020-October 2023

Table 6B Imports of Electricity January 2020-October 2023

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Table 1A Metered Electricity Generation by Primary Fuel Category October 2020-2023
Megawatt hours (MWh)
Fuel	October 2020	October 2021	October 2022	October 2023
Coal	74,434	229,457	108,610	93,273
Oil	22,846	170,464	52,143	20,042
Biomass/Peat	151,260	54,622	51,665	40,057
Gas	1,088,242	1,018,705	1,056,746	1,132,290
Distillate	323	13,440	1,271	570
Waste	36,073	51,575	44,836	56,588
Wind	1,192,174	961,004	1,262,786	844,081
Solar	–	–	3,631	36,656
Renewable Hydro	82,945	69,626	93,751	101,217
Pumped Storage Hydro	23,357	24,172	24,636	29,433
Battery Storage	6	74	238	494
Other Renewable	15,564	14,661	12,495	14,302
Other Non-Renewable	1,683	2,977	1,356	1,170
Net Generation	2,688,907	2,610,776	2,714,165	2,370,174
– No Data

Table 2 Metered Electricity Generation by Primary Fuel Category 2020-2023
Megawatt hours (MWh)
Fuel	2020	2021	2022	2023 (year-to-date)
Coal	723,440	2,780,312	2,520,081	999,970
Oil	246,292	1,066,341	633,848	93,946
Biomass/Peat	1,221,759	682,204	650,208	346,249
Gas	15,025,727	13,957,288	15,363,430	12,211,366
Distillate	19,304	93,036	86,242	7,846
Waste	554,258	602,480	590,602	488,098
Wind	12,167,433	10,089,646	11,370,761	9,050,144
Solar	–	–	20,120	405,779
Renewable Hydro	928,144	747,303	698,806	696,504
Pumped Storage Hydro	288,326	282,817	243,976	239,220
Battery Storage	37	251	2,780	5,136
Other Renewable	185,053	193,393	167,604	138,402
Other Non-Renewable	20,936	32,483	19,510	12,145
Net Generation	31,380,709	30,527,556	32,367,967	24,694,803
– No Data

Table 3A Metered Electricity Generation for All Fuels by Day October 2020-2023
Megawatt hours (MWh)
Day	October 2020	October 2021	October 2022	October 2023
1	69,314	91,902	75,179	66,074
2	88,519	83,113	75,436	74,027
3	75,031	81,488	99,335	75,146
4	96,020	81,149	86,230	84,110
5	87,393	88,673	94,640	90,491
6	95,834	91,099	92,095	82,555
7	75,971	102,145	84,456	68,883
8	85,337	93,813	72,492	66,117
9	94,527	80,806	84,148	75,334
10	87,034	74,009	78,854	79,559
11	64,337	75,863	87,847	74,282
12	90,871	77,844	75,663	76,523
13	95,304	79,187	81,958	72,651
14	81,342	85,652	79,715	66,678
15	76,824	80,902	84,114	68,708
16	85,372	88,621	80,521	83,512
17	83,448	77,961	85,989	95,228
18	80,729	93,485	97,422	84,980
19	95,878	95,861	95,948	76,244
20	94,934	79,440	98,662	78,379
21	87,811	85,926	104,765	68,209
22	80,427	83,977	85,740	73,910
23	88,472	95,529	68,937	81,537
24	91,179	83,604	80,902	75,511
25	84,319	81,419	96,882	87,347
26	82,708	103,245	101,815	79,385
27	100,343	65,545	100,524	78,797
28	96,505	78,123	91,950	68,070
29	101,351	74,244	95,370	66,368
30	78,673	74,575	91,999	68,914
31	93,099	81,577	84,580	82,646
Net Generation	2,688,907	2,610,776	2,714,165	2,370,174

Table 6A Exports of Electricity January 2020-October 2023
Megawatt hours (MWh)
Exports	January	February	March	April	May	June	July	August	September	October	November	December	Total
2020	129,420	225,377	137,774	76,520	168,225	170,094	166,285	135,262	181,436	168,234	174,512	179,956	1,913,096
2021	97,182	127,329	86,782	26,527	49,234	26,644	2,727	42,520	41,178	83,750	101,782	177,675	863,329
2022	141,624	163,237	53,243	21,805	65,065	101,534	132,653	138,442	95,150	148,387	163,843	104,749	1,329,732
2023	56,962	70,447	56,341	40,712	32,529	11,700	36,054	34,974	23,464	6,737			369,920

Table 6B Imports of Electricity January 2020-October 2023
Megawatt hours (MWh)
Imports	January	February	March	April	May	June	July	August	September	October	November	December	Total
2020	210,258	128,569	184,706	216,733	112,691	103,676	106,636	89,357	139,755	177,450	147,295	144,322	1,761,447
2021	112,696	130,925	234,242	230,205	348,422	208,150	416,465	203,552	196,578	174,180	127,960	67,547	2,450,923
2022	99,892	104,063	165,204	141,546	129,876	149,003	166,815	119,276	107,967	146,327	105,472	146,188	1,581,628
2023	230,339	188,109	254,281	260,626	349,818	325,062	324,358	327,974	364,109	480,466			3,105,141

Metered Electricity Generation October 2023

Key Findings

Renewable fuels produced 42% of metered electricity in October 2023, but more fossil fuels were used to meet peak evening demand

Key Findings

Statistician's Comment

Monthly and Year-to-date Peak Demand

Monthly Renewable Share

Solar Farms

Renewable Hydro

Coal

Natural Gas and Wind

Meteorological Conditions affect Generation from Renewables

Exports and Imports of Electricity

Editor's Note

Half-hourly Generation Trends During October

Primary Fuel Share in Monthly Metered Electricity Generation

Primary Fuel Used in Metered Electricity Generation

Daily Metered Electricity Generation

Fuel Share of Metered Electricity Generation for October 2023

Monthly Metered Electricity Generation by Time Period

Wind Generation is Highest in Winter

Meteorological Conditions Affect Generation From Renewables

Renewable Proportion by Time Period and Month

Number of Generation Plants by Primary Fuel

Exports and Imports of Electricity

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Table 5 Number of Generation Plants by Primary Fuel Category 2020-2023
Plants
Primary Fuel	2020	2021	2022	2023 (year-to-date)
Coal	2	2	2	2
Oil	5	5	5	5
Biomass/Peat	3	3	3	3
Gas	28	28	27	29
Distillate	7	7	7	7
Waste	2	2	2	2
Wind	348	318	314	311
Solar	–	–	15	20
Renewable Hydro	67	63	66	60
Pumped Storage Hydro	4	4	4	4
Battery Storage	1	8	16	17
Other Renewable	37	36	40	36
Other Non-Renewable	3	3	3	3
All	507	479	504	499
– No Data
The number of generation plants should be regarded as indicative. A generation plant which changed ownership during a year is counted as two plants e.g. if a wind farm was sold.