Battery storage case studies
Representative commercial installs across UK industry. Every figure is modelled the way we model yours — from half-hourly data, with the value streams that actually applied.
500 kWh peak-shaving battery at a Midlands injection moulder
A plastics manufacturer near Coventry running a spiky daytime load on a 500 kVA connection, hit hard by red-band DUoS and a six-figure annual bill. The site wanted to add a new moulding line but had no spare agreed capacity.
- 500 kWh
- capacity
- 250 kW
- power
- £86,000
- annual saving
- 5.4 yr
- payback
Outcome: The battery shaved the weekday peak enough to absorb the new line within the existing connection — avoiding a £140,000 DNO reinforcement — and cut red-band DUoS and peak unit costs. Funded under AIA; net of tax relief, payback came in under 5.5 years.
250 kWh solar-plus-storage at a Yorkshire cold store
A refrigerated 3PL warehouse near Leeds with a 180 kW rooftop solar array exporting around 40% of generation at a low SEG rate. Round-the-clock refrigeration meant a strong overnight and evening baseload the solar couldn't cover.
- 250 kWh
- capacity
- 125 kW
- power
- £41,000
- annual saving
- 6.6 yr
- payback
Outcome: Self-consumption rose from 58% to 91%. Surplus midday solar now runs the refrigeration into the evening peak instead of exporting at 6p/kWh. Combined with red-band avoidance, the battery paid back inside seven years.
860 kWh revenue-stacking battery at a logistics depot
A national distribution depot near Doncaster's iPort with a large, flat load and an aggregator relationship already in place. The operator wanted both a bill cut and a grid-revenue line.
- 860 kWh
- capacity
- 430 kW
- power
- £178,000
- annual saving
- 5.1 yr
- payback
Outcome: Arbitrage and peak-shaving cut the bill ~22%; a Capacity Market agreement plus Balancing Mechanism participation via the aggregator (post-P415) added a six-figure annual revenue line. Blended payback just over five years.