Grant / Funding Route
IETF Phase 3 grant funding for office solar
Industrial Energy Transformation Fund (IETF): Up to 30% capex (max £6m). Eligible for industrial sites in england.
At a glance
- Funding type
- Industrial Energy Transformation Fund (IETF)
- Value
- Up to 30% capex (max £6m)
- Eligibility
- Industrial sites in England
The Industrial Energy Transformation Fund is administered by the UK Department for Energy Security and Net Zero (DESNZ). Phase 3, running 2024-2028, provides £185m of funding for industrial decarbonisation projects in England.
Grant funding covers up to 30% of project capex with a maximum award of £6m per project. Funding is competitive and weighted toward projects delivering the highest absolute carbon reduction per pound of grant.
Office-based businesses can qualify where the office is part of an industrial site — typically R&D HQs, manufacturing administrative buildings, or factory office blocks adjoining production facilities. Pure-office sites without industrial process load are usually not eligible.
The IETF application process requires:
Application windows open periodically — typically twice per year. The next anticipated window in 2026 opens in Q3.
For office solar combined with site-wide industrial decarbonisation (heat recovery, heat pumps, process electrification), IETF provides one of the most material grant routes available. We work with specialist grant consultants on larger IETF applications and have supported successful applications totalling £18m+ across our client base.