Commercial battery storage has evolved from a niche technology to a mainstream business tool. With electricity prices volatile and grid capacity increasingly constrained, batteries offer UK businesses a way to take control of their energy costs while improving resilience and sustainability.
Why Commercial Battery Storage?
Battery storage systems store electricity when it's cheap or abundant and discharge when it's expensive or needed. For businesses, this translates into several key benefits:
Peak Shaving
Many commercial electricity contracts include demand charges based on your maximum power draw (measured in kVA). A 100kVA peak, even for just 15 minutes, can add thousands to your annual bill. Battery storage "shaves" these peaks by discharging during high-demand periods.
Example: A manufacturing facility with a 150kVA peak reduced it to 100kVA using a 50kWh battery, saving £8,000 annually on demand charges alone.
Energy Arbitrage
Electricity prices vary significantly throughout the day. With time-of-use tariffs becoming more common, businesses can charge batteries during cheap overnight periods and discharge during expensive peak times.
- Off-peak rates: 8-15p/kWh (typically 11pm-7am)
- Peak rates: 30-45p/kWh (typically 4pm-7pm)
- Potential saving: 15-30p per kWh cycled
Solar Self-Consumption
Without storage, solar PV systems typically achieve 30-50% self-consumption for businesses. Batteries can increase this to 70-90%, using solar generation after the sun sets and reducing grid imports.
Backup Power
Grid outages cost businesses money - from lost production to spoiled stock. Battery systems provide seamless backup power for critical loads, often faster than diesel generators.
Grid Services Revenue
Larger battery systems can earn revenue by providing services to National Grid, including frequency response and demand flexibility. Revenue streams of £50-150/kW/year are achievable.