[pjc50]

Ugh, I did 1kWh = 1000 watt-seconds, which should be 3600 watt-seconds, so the calculations are off by a factor of four.

[ftth_finland]

£0.30 per kWh is also optimistic over the lifetime of the panel.

Around these parts you get the spot price for any solar you generate. Prices can, and do, go negative.

In general prices tend to be low when the sun is shining and/or the wind is blowing.

So, you might even end up paying for the pleasure of providing solar power :)