🇬🇧 United Kingdom
Battery energy storage
Commercial battery storage from single-cabinet units to containerised BESS — shifting solar into evening load, cutting peak demand and holding critical processes through an outage.
- LFP chemistry as standard
- Cabinet systems from 30 kWh to containerised MWh-scale
- Peak shaving, load shifting and backup modes
- Fire strategy and siting guidance
What a battery is actually paid for
Three things: moving solar generation from midday into evening load, reducing the site's peak demand charge, and keeping critical load alive through an outage. Only the first two show up as recurring savings — value the third as risk reduction, not as revenue.
Sizing
A battery only earns on the energy that passes through it. Sizing follows the daily surplus after direct use, not the size of the array. Our calculator models a modest self-consumption uplift and shows the incremental payback for the battery on its own, so it can be judged separately from the PV.
Siting, fire and ventilation
Commercial storage needs a considered location: separation distances, ventilation, access for the fire service and an agreed fire strategy. Bring this into the design early — it is far cheaper than relocating a cabinet after commissioning.
Tariff dependency
Storage economics move with the spread between day and night unit rates and with capacity charges. A contract renewal can change the case in either direction, so we model against your current contract and flag the sensitivity rather than assuming a fixed spread for 25 years.
United Kingdom: regulatory & commercial notes
These apply to the United Kingdom only and do not transfer to the other market.
- Connection
- Storage capable of export forms part of the G98/G99 application to the DNO. Export limitation is routinely used where the connection is constrained.
- VAT and allowances
- Battery storage installed with, or retrofitted to, qualifying installations may attract 0% VAT, and generally falls into the special-rate pool for capital allowances. Confirm your position with your accountant.