Commercial solar savings depend mainly on how much of the generated power you use on site (self-consumption), your current electricity rate, and how much roof or land you have. Under a PPA, businesses typically pay a fixed rate at least 30% below the grid for the solar they use — the exact figure comes from a tailored assessment.
Self-consumption is the biggest factor
The more solar you use on site rather than exporting, the greater the saving — because every self-used kilowatt-hour replaces expensive grid electricity. Businesses that operate through the day, such as warehouses, factories and offices, tend to see the strongest returns.
Your current rate and usage
If you pay a high pence-per-kWh rate and use a lot of electricity, the savings from displacing grid power are larger. That is why we ask for around twelve months of consumption data and your current rates — it lets us model realistic, honest numbers rather than a headline figure.
Adding battery storage
Battery storage lifts savings further by storing solar (or cheap off-peak energy) for use during expensive peak periods, and by extending self-consumption into mornings and evenings.
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
Can you give me a savings figure over the phone?
We can give a rough indication, but an accurate figure needs your consumption data, current rates and site details. That is what a free, no-obligation proposal provides.
What do I need to get an accurate estimate?
Ideally your site address, around twelve months of consumption data (half-hourly if you have it), your current day and night rates, and your contract end date. See our half-hourly data guide for more.
Related guides
- Capital allowances on commercial solar: full expensing & AIA explained
- How solar improves your commercial EPC (and helps with MEES)
- Commercial battery storage: costs, savings and payback
See our funding options, commercial solar and solar by industry pages.