Adding solar to a commercial building reduces the amount of grid electricity it needs, which is one of the more effective ways to improve its EPC rating. A better EPC helps you meet Minimum Energy Efficiency Standards (MEES), avoid letting restrictions, and protect the value and lettability of the property.
What is MEES?
The Minimum Energy Efficiency Standards (MEES) set a minimum EPC rating for privately rented property. For commercial property in England and Wales, it is generally unlawful to continue letting a building with an EPC below E, and the government has signalled its intention to raise the minimum over time. Landlords who fall short can face restrictions on letting and financial penalties.
How solar moves the rating
An EPC reflects a building’s energy performance. Because on-site solar lowers the amount of electricity drawn from the grid, it improves the modelled performance and can lift the rating — often by a meaningful margin on electrically heated or high-consumption buildings.
Why it matters for value
A stronger EPC is not just about compliance. It supports rent, widens the pool of tenants who can legally occupy the space, and increasingly influences buyer and investor decisions. Solar funded through a PPA delivers that improvement with no upfront cost.
This guide is general information, not financial or tax advice. Your circumstances determine what applies — please confirm with your accountant or advisor. Get a tailored proposal →
Frequently asked questions
How much will solar improve my EPC?
It depends on the building’s size, use and existing systems, but reducing grid-drawn electricity is one of the stronger levers available. We can indicate the likely impact as part of a free assessment.
Does the tenant or landlord benefit?
Both can, depending on the lease and who uses the generated power. We can structure a PPA around a landlord, a tenant, or both, and advise on the best arrangement.
Related guides
- Capital allowances on commercial solar: full expensing & AIA explained
- How much can your business save with commercial solar?
- Commercial battery storage: costs, savings and payback
See our funding options, commercial solar and solar by industry pages.