Solar panels on garage

This is a proposal from The Solar Bureau (via Solar Together) to install 8 solar panels and a battery in my garage.

8 x Aiko Energy 445 Watt Panels (AIKO-A445-MAH54Mb (30mm))
1 x H1-3.7-E (Fox ESS)
1 x EP11 Integrated with Warming Function (Fox ESS)
8 x TS4-A-O (Optimisers)

Standard System Price: £3,593.00
TIGO Optimiser: £440.00
Bird Mesh (BE): £280.00
Fox Medium "H" Heated 10.36kWh Battery - 9.3kWh Usable Capacity: £2,502.00
Zappi EV 7kW charger: £1,200.00
Bespoke Scaffold: £350.00
7M Trench: £750.00
Extended Cable Run: £400.00
Extended EV Cable Run: £450.00

Total System Price: £9,965.00

My annual electricity consumption is 2300kWh. Using their calculations, I can expect to save £682 in the first year. Feels like it will take a long time to pay for itself at that rate.

I wanted them to give a price for putting more panels on the house too. The numbers might look better then. I'll make another post if/when they get back to me about that.