So a bit more to add.
Going solar? This one isn’t going to happen with me for a while. If you’re at home during the day then solar charging will work, but if you’re a commuter then it’s going to be a bit more of a challenge.
A 4kW/h solar array with good quality cells and proper control hardware is going to set you back around £10k. Going above that level means needing additional consents from your energy supplier and local grid operator. They may decline!
If you want to store the daylight power then you need a battery system (and the space for it inside the house) and those are also serious money. You might be OK for about £6k, but you might need more capacity and that means cost. Some battery systems are nearly £10k on their own, and the battery itself has a finite life (typically 10 years).
This being said, at current electricity prices (May ‘22) a complete system will probably pay for itself in 6-7 years. That’s great if you can afford the upfront costs and have (ideally) a large south facing roof space available. If you fancy feeding power into the grid, the rates are awful! As low as £0.015 (1.5p) per kW/h!! Some are a bit better (£0.05) but still well below what you pay to get energy.
Going ‘green’ is far from cheap especially if you want to go all-in.
Costs are falling all of the time and are half what they were 10 years ago. Decent solar panels (LG, Samsung etc) retain >93% efficiency at 25 years guaranteed. You also need to factor in cleaning of the array and that could mean scaffolding or a cherry picker if access is difficult. It can be done from the ground too with the right kit (not a jet washer please note
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