Solar: One Year On

It has now been 12 months since we had solar installed - and we've already planted a few trees:

Looking more closely at the the stats . . .

• 12 solar panels on the roof of the house (all made by LG)
• Total generated 3.01 MW-h
• Individually the panels averaged 257 kW-h over the year
• The top performing panel generated 275 kW-h and the poorest 231 kW-h

The shade cast by the yew tree is a big factor for at least two of the panels (it will be interesting to see if its recent downsizing will impact on next year's performance). Keen readers may notice that the panel average does not equate to the totals below, this may be due to the fact we had the wrong inverter installed for a day or two..... Or it could just be inaccurate reporting by the Solaredge equipment!

Our best performing day for solar generation was 28th May 2019 when we generated 24.24 Kilowatt Hours (kW-h), with the month of May being the highest month for overall solar generation. Below are the Top 10 and Bottom 10 dates for solar generation throughout the year. It should be no surprise to see that many of the bottom 10 dates are near the shortest day of the year.

Date	Watt Hours		Date	Watt Hours
28/05/2019	24,235		15/02/2019	50
04/05/2019	23,822		23/12/2018	102
11/05/2019	23,385		07/01/2019	115
21/05/2019	23,345		18/12/2018	130
22/06/2019	23,107		13/11/2018	224
12/05/2019	22,899		05/12/2018	226
21/06/2019	22,796		06/12/2018	258
20/06/2019	22,760		15/12/2018	261
05/07/2019	22,729		29/12/2018	304
03/07/2019	22,720		31/12/2018	316

The table below shows the electricity generated by the panels - the figure in green is the resulting reduction in our monthly electricity bill.  Much of our surplus generated electric goes straight into the hot water with the rest being fed back into the national grid (a back of the envelope calculation estimates this as being an average 47% of the energy generated).

Year	Month	Generated kW-h	Consumption reduction %
2018	September	156.106	- 29.3%
	October	206.419	- 36.2%
	November	87.261	- 22.2%
	December	32.87	- 25.2%
2019	January	62.46	- 37.5%
	February	175.996	- 42.3%
	March	283.345	- 32.5%
	April	393.949	- 49.9%
	May	489.449	- 54.6%
	June	401.437	- 51.5%
	July	445.908	- 67.1%
	August	404.56	- 53.2%
	September	337.506	- 23.6%
Total		3477.226	- 42.5%

And of course there must be a graph!

Looking forward to seeing what the next 12 months generate . . .