Working file M4.1
Solar PV cost (UK 2026)
Solar PV cost: installed cost, VAT treatment, payback shape.
Cost in 2026
Solar PV cost (UK 2026). The published installed range in 2026 is £1,450 to £2,200 per kWp installed (Solar Energy UK and MCS publisher), or £5,800 to £8,800 for a typical 4 kWp 3-bed array. Both ends of that range are stated rather than collapsed to a midpoint, because the spread reflects real differences in scope, access and grant eligibility rather than installer mark-up.
What drives the spread
- Roof pitch, orientation and shading.
- Inverter class (string, hybrid, micro).
- Scaffolding and DNO application overhead.
- above 0% VAT applies until 31 March 2027.
Where it sits in the PAS 2035 sequence
Renewables stratum, fourth.
Surveyed 22 June 2026. Ofgem Q3 2026 cap applied (gas 7.33p, elec 26.11p, gas standing 29.04p). Next scheduled review 26 September 2026 (Q4 cap publication). [ref M4.1]
By Oliver Wakefield-Smith, Founder, Digital Signet. Corrections to oliver at digitalsignet dot com.