About 5 years ago I finish this
The loft conversion gives a flat roof space clear to the skyline aside from the RHS stack. From the balcony look outward to the garden is direct south which allows for a continuous pool of sun all day - when it's sunny.
Flat roof space is 7m x 6.5m or 45 odd sq metres.
The PV tariffs for domestic generated PV are
System Type Size Rate/kWh
Solar PV 0 - 4kWp (new build) 36.1p
Solar PV 0 - 4kWp 41.3p
Solar PV 4kWp - 10kWp 36.1p
Solar PV 10kWp - 100kWp 31.4p
Solar PV 100kWp - 5,000kWp 29.3p
So say I went with a 12 panel (175w each) system that would generate (my cals could be flawed):-
5 hours sun per day x 175w x 12 panels x 365 days per year- 3800 odd kwh
Say I use 30% of that and sell the rest back
2500 kwh x 41.3p means £10k per year back from the grid. The 1300 kwh I use would knock a modest £130 a year of my current usage costs.
I understand panels can be found in trade for £400 odd each (can anyone confirm a source / supplier offering trade costs ???).
So say £5k for panels, 2k for inverters and installation costs- £7k total.
If the above were true then we'd all have PV !
What do I need to buy and leave on the roof to allow some sensible measurement of sun strength and light hours ?
The loft conversion gives a flat roof space clear to the skyline aside from the RHS stack. From the balcony look outward to the garden is direct south which allows for a continuous pool of sun all day - when it's sunny.
Flat roof space is 7m x 6.5m or 45 odd sq metres.
The PV tariffs for domestic generated PV are
System Type Size Rate/kWh
Solar PV 0 - 4kWp (new build) 36.1p
Solar PV 0 - 4kWp 41.3p
Solar PV 4kWp - 10kWp 36.1p
Solar PV 10kWp - 100kWp 31.4p
Solar PV 100kWp - 5,000kWp 29.3p
So say I went with a 12 panel (175w each) system that would generate (my cals could be flawed):-
5 hours sun per day x 175w x 12 panels x 365 days per year- 3800 odd kwh
Say I use 30% of that and sell the rest back
2500 kwh x 41.3p means £10k per year back from the grid. The 1300 kwh I use would knock a modest £130 a year of my current usage costs.
I understand panels can be found in trade for £400 odd each (can anyone confirm a source / supplier offering trade costs ???).
So say £5k for panels, 2k for inverters and installation costs- £7k total.
If the above were true then we'd all have PV !
What do I need to buy and leave on the roof to allow some sensible measurement of sun strength and light hours ?