# How much can your business save with commercial solar?

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.

## 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.

## Sources & further reading

- [Ofgem — energy regulator (tariffs & network charges)](https://www.ofgem.gov.uk)
- [Energy Saving Trust — solar PV guidance](https://energysavingtrust.org.uk)
- [Ofgem — Smart Export Guarantee](https://www.ofgem.gov.uk/environmental-and-social-schemes/smart-export-guarantee-seg)

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Source: [How much can your business save with commercial solar?](https://ppafunding.com/guides/how-much-can-a-business-save-with-solar) · Author: PPA Funding team · Updated: 2026-07-30

PPA Funding is an independent introducer operated by DVC Group Ltd (Companies House 10462808), Shrewsbury — not the funder, the installer or the maintenance provider. The service is free to use; a commission may be earned from a partner at no extra cost. Content is educational and is not financial or tax advice.