Factory solar panel cost in the UK (2026)
UK factories & manufacturers typically invest £110,000-£1,100,000 on commercial solar installations ranging from 150-1500 kWp. Sector-typical load profile delivers 80% self-consumption and payback in 2-4 years post-tax-and-grant.
Factory solar cost snapshot
| Typical system size | 150 – 1,500 kWp |
| 2026 capex range | £110,000 – £1,100,000 |
| £/Wp | £0.65 – £1.10 (size-dependent) |
| Self-consumption rate | 80% typical |
| Load pattern | high constant daytime industrial load |
| Best grant stack | AIA / 50% first-year allowance + SEG + REGO (the IETF that once added a 30-50% match closed in July 2025) |
| Typical payback | 2-4 years post-tax-and-grant |
Post-tax economics for factories & manufacturers
For limited companies, the AIA reduces effective net cost by 25% in year one (solar is special-rate plant, so full expensing does not apply). Partnerships and sole traders use the AIA at their marginal income tax rate (typically 19-45%).
Factory grant stack in detail
UK factories & manufacturers typically access this combination:
- Tax relief: the AIA for every business type (solar is special-rate, so full expensing does not apply) — AIA (partnerships, sole traders)
- Export income: Smart Export Guarantee — typically 3-15p/kWh on exports
- Sector grants: See factories & manufacturers sector guide for primary grant routes
- Regional schemes: Growth hub grants, devolved nation funding — see locations hub
Next steps for factories & manufacturers
- Read the full factories & manufacturers sector guide for grant stack, watch-outs and case studies
- Compare system sizes with the cost-by-size hub
- Run the free eligibility calculator for a personalised funding match
- Browse case studies for factory sector projects
Factory solar cost · FAQs
How much does factory solar cost?
At 2026 prices, UK factories & manufacturers typically invest £110,000-£1,100,000 on commercial solar installations of 150-1500 kWp. Net of AIA tax relief for limited companies at 25% CT, that's £82,500-£825,000.
What's the typical factory payback period?
Typical post-tax payback for UK factory solar: 2-4 years post-tax-and-grant. Strong self-consumption rates (80% typical for this sector) compress payback.
Which grants apply to factories & manufacturers?
The typical grant stack for UK factories & manufacturers: AIA / 50% first-year allowance + SEG + REGO (the IETF that once added a 30-50% match closed in July 2025). See the sector page for full eligibility and worked examples.
How does factory load profile affect solar economics?
Factory load profile is characterised by: high constant daytime industrial load. This delivers 80% typical self-consumption rate — materially affecting payback compared to lower-utilisation sectors.
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