Solar is a joke in this country and it always will be due to the regular overcast weather.
I was quoted £14000 for a solar and battery system and when i looked at the predicted daily generation by month which was very ambitious and likely to much less, it became very clear that i would not benefit much from fitting the system
It would take me about 12 years to get any sort of payback on my initial investment, and by then the panels and batteries will be knackered and likely need replacing, so its another false economy.
The true benefit goes to the power companies because they get a reduction in demand on the grid, and they will buy the extra power you generate during summer for a about £0.03 per kwh and then sell it back to you for about £0.60 per kwh
The Uk is much more suited to wind, wave and hydro power. Solar panels are more suited for the desert which is basked in sunshine all year round
I know a few people who jumped on the solar bandwagon, and they are regret it because they are not getting what they were promised