Renewables: "talking 'bout my generation"

debitcardmayhem

Firstly Happy New Year to all 
Secondly Many thanks for the best wishes , hopefully on the mend got home NY eve , not the best year home / health wise.
Over the season I got 
24 0.08 Os
25 2.31
26 2.02 
27 0.54
28 0.16
29 0.14
30 1.77 
31 2.54 Os

December 163kWp vs 155
2025 5042 kWp vs 4700 +1.07% ✅
Overall a very good solar year 

Magnitio

Last day of the year was quite foggy, although it was really sunny just 5 miles away - 0.6 O's. 

December ended at 115% of PVGIS and the year at 103%, which is second best out of four since installation.

Gas for central heating was the lowest of the last 9 years I have records for at 5,300 kWh. Hoping this year we will switch to a heat pump if I can persuade the boss.

Martyn1981

December results. 

Month looks bad on paper with 60% of target. Big spread, with 56% for the ESE/SSW* and 89% for the WNW. But the WNW figure isn't impacted by battery charging losses, and will be a truer representation of the months 'real' generation. Year end projection ~96% of target. 

[*2.1kWp SSW ground mount is steep pitched for winter, and sits between a large tree to the SE and the house to the SW, so will incurr some shading throughout Apr-Sep. The rest of the PV is roof mounted, ESE & WNW, and receives shome shading, but all PV is Solaredge to minimise shading losses.]

Generated 105kWh (12.03 O's).
Imported 973kWh.  [All cheap rate apart from 14.7kWh]
Exported 21kWh.
Total consumption 1,057kWh. 
Gas zero since late Oct.



Year end figures:

Generated 6,990kWh (801.15 O's) 96% of target. [Estimate 98.5% of target if battery charging losses are excluded.]
Imported 5,831kWh.  [All cheap rate apart from ~0.5kWh/day that sneaks through.*]
Exported 4,166kWh.
Total consumption 8,655kWh.   [That's all household demand, but excludes some BEV charging away from home, which I'll guestimate at ~300kWh.]
Gas from Jan to late Oct 655kWh.

*Day rate leccy imports due to three factors. First and smallest, the battery inverter not being able to react perfectly to demand increases. Secondly, not being able to match varying demand from microwave and induction hobs which don't sit at 100%, but phase between 0% and 200%. Thirdly, once we replaced the gas oven in Oct, it, plus any other demand on at the same time, can exceed the inverter limit of 3.68kW. But all in all, I think ~0.5kWh/day is excellent.


Edit - Estimated leccy bill for the next year, at current rates, is ~£550. Estimated export income, at current rates, is ~£550 to £600. Nice. 

Merlin139

Ended the month on a near perfect bell curve of Sun. Best day of the month.

2.55 O's

Ended the month on 21.88 O's or 81.64% of PVGIS 

December Mean Average over 12 years 102.48% of PVGIS

Ended the year on 1045.16 O's 114.59% of PVGIS

A year of 2 halves.

Jan to Jun 128.3% of PVGIS
Jul to Dec  99.11% of PVGIS

2025 ranked 4th out of 12 for production.

Alnat1

Made 113% of PVGIS for the year which was very good, especially as the inverter was replaced twice in July and August.

SuzeQStan

December - 74% of PVGIS - despite that it’s still our best December to date

year end - 1000 x O’s exact

And 105% of annual PVGIS

generation paid £545 this year - v happy with that

next year I’m going to have to make shading allowances for the winter months as even on the rare perfect sunny day we still don’t generate much due to trees down the way from us with the low winter sun. 

jimjames

Fantastic 2025, best year since panels installed in 2011. Total of 3578kWh which equates to 1192kWh per kWp for the whole year. 2022 was close behind. Lowest was 3053kWh in 2024 so maybe these things average out. It definitely doesn't show any sign of panels degrading when there is so much variation year to year.

Netexporter

A monumental 0.21 Os to start the year.

Things can only get better...

SuzeQStan

Must admit I feel a bit better now - 0.43 O’s today 

pete-20-11

SuzeQStan said:

Must admit I feel a bit better now - 0.43 O’s today 

Snap, 0.43 too