Commercial battery storage saves money in three main ways: storing cheap off-peak or self-generated solar energy for use at expensive peak times, shaving costly demand peaks, and increasing how much of your solar you use on site. It can be funded with no upfront cost, so you benefit from the savings straight away.
Where the savings come from
A battery lets you buy or generate energy when it is cheap and use it when it is dear. For businesses on time-of-use tariffs, that gap between off-peak and peak rates is where much of the value sits. Batteries also reduce short, expensive demand spikes that push up capacity charges.
With or without solar
Paired with solar, a battery stores surplus daytime generation for the evening, lifting self-consumption. On its own, it still earns its keep through off-peak charging and peak discharging — useful for high-usage sites with limited roof space or in lower-sunlight areas.
What affects payback
The main factors are your usage pattern, the spread between your peak and off-peak rates, and how the system is sized. A well-sized battery matched to a genuine load profile pays back faster than an oversized one, which is why the assessment matters.
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
Is battery storage worth it without solar?
It can be. A standalone battery still saves money by charging on cheap off-peak energy and discharging during expensive peaks. It suits high-usage sites and those with little roof space.
How is battery storage funded?
Like solar, it can be funded through a PPA (zero upfront), hire purchase or outright purchase. Our funding options page compares them.
Related guides
- Capital allowances on commercial solar: full expensing & AIA explained
- How solar improves your commercial EPC (and helps with MEES)
- How much can your business save with commercial solar?
See our funding options, commercial solar and solar by industry pages.