Indicative 4 kWp install in Aberdeen: £6,650–£7,800. Region: Scotland / North / NI (×0.94). Annual irradiance: ~820 kWh/kWp.
What Aberdeen homeowners actually pay
Aberdeen has the lowest irradiance of any UK city we publish for at ~810 kWh/kWp/yr, but Home Energy Scotland's interest-free loan and the Warmer Homes Scotland grant materially shift the maths. A 4 kWp install on a typical granite-and-slate Aberdeen semi lands £6,200–£8,000, with annual generation around 3,240 kWh and payback typically 11–14 years on cash, or much shorter when grants and interest-free finance apply.
Local notes for Aberdeen
Granite roofs and slate are the norm — slate premium of ~10% on labour applies.
Irradiance ~810 kWh/kWp/yr — the lowest of any UK city we cover.
North Sea coastal exposure — marine-grade fixings essential.
Home Energy Scotland interest-free loans and grants are worth checking before any private finance.
Field notes
Lowest UK irradiance covered — ~3,240 kWh/yr from 4 kWp.
DNO is SSEN — typical G99 turnaround 5–7 weeks.
Check Home Energy Scotland support before signing any finance deal.
Frequently asked questions
Is solar viable in Aberdeen?
Yes, especially with Home Energy Scotland's interest-free loans — these can fully cover the upfront cost and let bill savings repay the loan over 12 years. Without subsidy, cash payback is 11–14 years.
What grants are available for Scottish solar?
Home Energy Scotland Loan offers up to £6,000 interest-free for solar PV (and more for batteries). Income-eligible homeowners may also qualify for Warmer Homes Scotland.