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 1 October 2026. Ofgem cap for 1 October to 31 December 2026 applied (gas 7.97p, elec 26.32p, gas standing 29.68p, elec standing 54.83p). Next scheduled review 25 November 2026 (January cap announcement). [ref M4.1]
By Oliver Wakefield-Smith, Founder, Digital Signet. Corrections to oliver at digitalsignet dot com.