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What Drives the Cost
There is no single sticker price for commercial storage because no two sites carry the same electrical setup. The table below shows how cost tends to behave across common size bands. Treat the per kWh figures as a broad industry guide, not a quote.
| System size | Typical use | Indicative industry guide (per kWh installed) |
|---|---|---|
| 30 to 50 kWh | Small site, single load or shop | Towards £450, sometimes above. Fixed design and mobilisation costs sit on a small system |
| 50 to 100 kWh | Offices, light industry, warehousing | Around £300 to £450 as scale improves |
| 100 kWh and above | Larger commercial or multi load sites | Around £220 to £300, though grid and civils work grows |
Battery hardware prices have fallen roughly 40% in the last year at the smaller end of the market, which is why older guides quote much higher figures. The biggest swing factors are not the battery itself. They are the grid connection and the electrical work around it.
Where the Money Actually Goes
Battery cells are only part of the bill. The rest sits in the work that makes the system safe and legal on your site.
Grid connection is the main variable. Most commercial systems need a G99 application to the network operator, though the smallest type tested setups can fall under the simpler G98 route. Any protection studies, switchgear or supply upgrades add cost. Three phase power, common on commercial sites, needs larger inverters than a home setup. Then there is the site work itself, meaning cable runs, mounting, fire protection and where the unit physically sits. Every install is carried out to BS 7671 and the IET Code of Practice for electrical energy storage.
Pairing with solar or EV charging can change the number either way. Shared electrical work can bring it down. Extra integration can add to it. We design battery, solar and EV charging as one system, so nothing is priced twice.
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Getting a Real Figure for Your Site
A guide range helps you budget. It does not replace a survey. We look at your load profile, your supply, your grid position and your available space, then give you one fixed, itemised price. Battery, inverter, electrical work and network paperwork, all in one number.
We handle the G99 application and the network operator approvals as part of every commercial install. You do not fill in a single form.
