Thanks for the advise Oscarmax much appericated. I wonder if the company that fiited yours will come out to Leicester.
Latest Quote for 12 panel is £7,375 and £12,290 with a 10kwh battery.
Panels – Hyundai – 4.74 kW Power -12 x 395 Watt Panels (HiE-S395VG) 3,809 kWh per year
3.6kW of Inverter Power SOLIS – Ningbo Ginlong Technologies – 1 x RHI-3.6K-48ES-5G
Battery – Fox Ess – 10.24 kWh Total Battery Storage – 1 x LV5200 (2 x 5.12kWh)
Its a better quote than the last one but still not as good as yours.