"solar PV north of Spain is pointless"
Why do people keep trotting out these statements? I have solar panels on my roof, and a small battery in the loft. I have also been working at home since March, which means a computer on all day, as well as everything that I would normally have on in the evenings.
Despite that, my average grid electricity usage throughout the spring and summer was rather less than 1kWh per day. I was really close to being self-sufficient, and I will have exported more than I imported.
It's now November, but the sun's come out. That means the battery is charging, ready to keep me going for some or all of this evening.
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