Rosher.Net

On this page you can see the actual meter readings, and the calculated payments due. Time has proven the calculations are fairly in line with payments, although somehow we seem a hundred and fifty quid or so down on the calculations… or perhaps I missed a cheque. That does seem more likely somehow.

Although the cost of the solar roof (£5499) and the solar diverter (£256) has yet to be paid in cash, the meter readings belie the savings we have had on actual consumption due to the use of solar electricity rather than imported. Overall, we’ve had our money back and more, particularly because of the gas boiler fuel savings from the solar diverter.

FIT or Feed-In Tariff, comprises two payments and those are locked into an RPI scale and set at the time of commissioning. Sadly, you are currently not able to secure these FIT rates as a new installation, since the government is no longer interested in domestic renewable power.

The £(Gen+Exp) is the presumed payment for the month, according to the existing regulations. There is a FiT (feed in tariff) Generation payment of 14.9p *19.16p for every unit (kWh) of electricity generated, and also an export payment of 4.64p *5.99p per unit for 50% of the electricity generated, assuming you use half of it yourself. Makes sense, of course, to use as much of it as you can…

• * FIT payments as from April 2022
• *FIT Payments from April 2023 are 21.73ppu and 6.79ppu/2
• November 2022, FIT moved from SSE to OVO Energy with no change to contract terms.
• Meter reading sent in 1st December 31332, payment £68.25 paid 24th Feb 2023 > £6187.16

Meter reading 6th March 2023 31660, awaiting payment £72.68 invoiced 10th May 2023

Month end Year Ten	Meter Reading	kWh Generated	£(Gen+Exp)	£ cumulative
December ’22	31383	51	£11.30	£6049.56
January 2023	31490	107	£23.71	£6073.27
February 2023	31650	160	£34.45	£6107.72
March 2023	31848	198	£41.87	£6149.59
April 2023	32204	356	£78.87	£6228.46
May 2023	0	0	£0	£0
June 2023	0	0	£0	£0
July 2023	0	0	£0	£0
August 2023	0	0	£0	£0
Septembr 2023	0	0	£0	£0
October 2023	0	0	£0	£0
November 2023	0	0	£0	£0
December 2023	0	0	£0	£0

Month end Year Nine	Meter Reading	kWh Generated	£(Gen+Exp)	£ cumulative
December ’21	27873	46	£9.37	£5296.83
January 2022	27960	87	£17.71	£5314.54
February 2022	28150	190	£38.64	£5353.18
March 2022	28395	245	£49.88	£5403.06
April 2022	28795	400	£81.84	£5484.90
May 2022	29280	485	£98.75	£5583.65
June 2022	29780	500	£110.76	£5694.41
July 2022*	30360	480	£106.34	£5800.75
August 2022	30749	489	£108.34	£5909.09
Septembr 2022	31024	275	£60.93	£5970.02
October 2022	31234	210	£46.53	£6016.55
November 2022	31332	98	£21.71	£6038.26
December 2022	31383	51	£11.30	£6049.56

Month end Year Eight	Meter Reading	kWh Generated	£(Gen+Exp)	£ cumulative
December ’20	24442	58	£11.80	£4600.32
January 2021	24500	58	£11.80	£4612.12
February 2021	24722	222	£45.20	£4657.32
March 2021	24955	233	£45.40	£4702.72
April 2021	25338	383	£77.98	£4780.70
May 2021	25853	515	£104.85	£4885.55
June 2021	26327	474	£96.51	£4982.06
July 2021	26818	491	£99.97	£5082.03
August 2021	27224	406	£82.66	£5164.69
Septembr 2021	27557	333	£67.80	£5232.49
October 2021	27734	177	£36.04	£5268.53
November 2021	27827	93	£18.93	£5287.46
December 2021	27873	46	£9.37	£5296.83

Month end Year Seven	Meter Reading	kWh Generated	£(Gen+Exp)	£ cumulative
December 2019	20805	61	£12.15	£3860.15
January 2020	20872	67	£13.35	£3873.50
February 2020	21042	170	£33.86	£3907.36
March 2020	21333	291	£57.97	£3965.33
April 2020	21830	497	£101.19	£4066.52
May 2020	22432	602	£122.57	£4189.09
June 2020	22921	489	£99.56	£4288.65
July 2020	23405	484	£98.54	£4387.19
August 2020	23779	374	£76.15	£4463.34
Septembr 2020	24121	342	£69.63	£4534.97
October 2020	24287	166	£33.80	£4568.77
November 2020	24384	97	£19.75	£4588.52
December 2020	24442	58	£11.80	£4600.32

Month end Year Six	Meter Reading	kWh Generated	£(Gen+Exp)	£ cumulative
December 2018	17367	57	£11.06	£3177.91
January 2019	17441	74	£14.36	£3192.27
February 2019	17611	170	£32.98	£3225.25
March 2019	17868	257	£49.86	£3275.11
April 2019	18277	409	£81.47	£3365.58
May 2019	18740	463	£92.23	£3448.81
June 2019	19170	430	£85.66	£3534.47
July 2019	19673	503	£100.20	£3634.67
August 2019	20139	466	£92.82	£3727.49
Septembr 2019	20486	347	£69.12	£3796.61
October 2019	20655	169	£33.66	£3830.27
November 2019	20744	89	£17.73	£3848.00
December 2019	20805	61	£12.15	£3860.15

Month end Year Five	Meter Reading	kWh Generated	£(Gen+Exp)	£ cumulative
December 2017	13881	0063	£11.74	£2501.21
January 2018	13958	0077	£14.35	£2515.56
February 2018	14146	0188	£35.03	£2550.59
March 2018	14349	0203	£37.83	£2588.42
April 2018	14649	300	£58.20	£2646.62
May 2018	15157	508	£98.55	£2745.17
June 2018	15782	625	£121.25	£2866.42
July 2018	16296	514	£95.78	£2962.20
August 2018	16704	408	£76.03	£3038.23
Septembr 2018	16969	265	£51.41	£3089.64
October 2018	17211	242	£46.95	£3136.59
November 2018	17310	99	£19.20	£3155.79
December 2018	17367	57	£11.06	£3166.85

Month end Year Four	Meter Reading	kWh Generated	£(Gen+Exp)	£ cumulative
December 2016	10544	0079	£14.37	£1883.29
January 2017	10610	0066	£12.00	£1895.29
February 2017	10730	0120	£21.82	£1917.11
March 2017	10987	0256	£46.55	£1963.66
April 2017	11402	0416	£77.52	£2041.18
May 2017	11867	0465	£86.65	£2126.83
June 2017	12360	0493	£91.87	£2218.70
July 2017	12842	0482	£89.82	£2308.52
August 2017	13252	0410	£76.40	£2384.92
Septembr 2017	13589	0337	£62.80	£2446.80
October 2017	13714	0125	£23.29	£2470.09
November 2017	13818	0104	£19.38	£2489.47
December 2017	13881	0063	£11.74	£2501.21

Month end Year Three	Meter Reading	kWh Generated	£(Gen+Exp)	£ cumulative
December 2015	7118	0045	£08.08	£1260.82
January 2016	7196	0078	£14.01	£1274.83
February 2016	7368	0172	£30.90	£1305.73
March 2016	7616	0248	£45.10	£1350.83
April 2016	8015	0399	£72.56	£1423.39
May 2016	8505	0490	£89.11	£1512.50
June 2016	8950	0445	£80.92	£1593.42
July 2016	9446	0496	£90.20	£1683.62
August 2016	9881	0435	£79.10	£1762.82
Septembr 2016	10157	0276	£50.19	£1812.91
October 2016	10362	0205	£37.28	£1850.19
November 2016	10465	0103	£18.73	£1868.92
December 2016	10544	0079	£14.37	£1883.29

Month end Year Two	Meter Reading	kWh Generated	£(Gen+Exp)	£ cumulative
December 2014	3552	0075	£13.39	£621.60
January 2015	3641	0089	£15.74	£637.34
February 2015	3777	0136	£24.05	£661.39
March 2015	4052	0275	£48.64	£710.03
April 2015	4530	0478	£85.87	£795.90
May 2015	5030	0500	£89.83	£885.73
June 2015	5607	0577	£103.65	£989.38
July 2015	6129	0522	£93.77	£1083.15
August 2015	6479	0350	£62.88	£1146.03
Septembr 2015	6839	0360	£64.67	£1210.70
October 2015	7010	0171	£30.72	£1241.42
November 2015	7073	0063	£11.32	£1252.74
December 2015	7118	0045	£08.08	£1260.82

Month end Year One	Meter Reading	kWh Generated	£(Gen+Exp)	£ cumulative
December 2013	0066.15	0067	£11.53	£11.53
January 2014	0138.52	0072	£12.39	£23.92
February 2014	0285.14	0147	£25.31	£49.23
March 2014	0577.48	0292	£50.28	£99.51
April 2014	0928.80	0351	£60.44	£159.95
May 2014	1382.75	0441	£77.99	£237.94
June 2014	1921.64	0539	£95.32	£333.26
July 2014	2471.08	0549	£97.17	£430.43
August 2014	2866.83	0396	£69.99	£500.42
Septembr 2014	3206.82	0340	£60.13	£560.55
October 2014	3379.82	0173	£30.60	£591.15
November 2014	3476.27	0096	£17.06	£608.21
December 2014	3552	0075	£13.39	£621.60

Pre-Solar Electricity Consumption averaged 2009-2013 at 6,500 kWh per annum
Post Solar Electricity Consumption averaged 2014-2018 at 4,300 kWh per annum

It’s important to note that the “£ cumulative” is solely the earned cash return from the generation. Savings on fuel bills are extra and potentially at least equal to the FIT. Gas use has reduced in the summer months because the overflow generation is pushed into the immersion tank, while electricity consumption obviously reduces in line with generated power used on site.

For ease of estimation, I would double the FIT and take that as the payback on the solar installation investment. Therefore it is likely this investment was paid off by end of year four, and the subsequent sixteen years of the FIT contract are clear profit.