1. I got two quotes. Prices were similar.Three points:-
1. I guess you didn't look around as that price was absolutely extortionate.
2. You don't need battery storage in this country as it is not cost effective.
3. You don't sell back to the grid at 1.5p per unit. Instead buy a solar iboost for £300 and divert all the power that would have gone back to the grid to heating the water instead. That will save you megabucks on your gas bill.
2. Having a battery, speeded up the break even speed on both quotes.
3. My gas bill really isn’t that high (new build, well insulated house). It wouldn’t make that much difference.