By the PPA Funding team Last updated
A corporate PPA is a long-term agreement in which a business buys renewable electricity directly at an agreed price — either from generation on its own site or from an off-site project. It gives price certainty and clear green credentials. For most SMEs, an on-site solar PPA is the accessible form of a corporate PPA.
How a corporate PPA works
Instead of buying all your electricity from a supplier at variable rates, you agree a fixed or predictable price for renewable power over a long term. That shields part of your energy cost from market swings and demonstrates a genuine commitment to lower-carbon energy.
On-site vs off-site for corporates
Large corporates sometimes sign off-site PPAs for whole portfolios. But an on-site solar PPA — generation on your own roof or land — delivers the same core benefits (price certainty, lower bills, carbon reduction) in a far simpler package that suits businesses of most sizes.
Is it only for large firms?
No. The term "corporate PPA" is used broadly, and the on-site model makes it practical for small and medium businesses, not just multinationals. If you have a suitable site and steady daytime demand, it can work for you.
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
Do I need to be a big company to sign a PPA?
No. On-site solar PPAs work well for small and medium businesses with a suitable roof or land and daytime energy use. We assess your site and tell you honestly whether it stacks up.
Does a corporate PPA change my electricity supplier?
An on-site PPA does not replace your supplier — you keep your grid connection and simply add on-site generation you buy through the PPA, reducing what you draw from the grid.
Sources & further reading
Related guides
- What's in a solar PPA contract? Key terms explained
- Solar PPA vs leasing: what's the difference for business?
- How to switch to a solar PPA (step by step)
See our funding options, commercial solar and solar by industry pages.