Commercial Battery Storage (BESS)
TECHNOLOGY
How they work
Commercial Battery Energy Storage Systems (BESS) capture, store, and dispatch electrical energy on demand. Combining high-capacity batteries – predominantly lithium-ion – with inverters and intelligent management software allows businesses to take active control of their energy use, reduce operating costs, and improve sustainability.
BESS sits between a facility's power sources – grid supply, on-site solar, or both – and the building's operational loads. An Energy Management System (EMS) controls when to charge the batteries, when to store renewable energy, and when to discharge stored power, making those decisions automatically based on tariff rates, demand patterns, and generation output.
highly modular
Where BESS works best
BESS technology is highly modular – scalable from medium commercial operations to large industrial sites. It tends to deliver the strongest returns for:
- Hospitals and data centres: Where uninterrupted power supply is critical and any outage has serious operational consequences.
- Manufacturing and cold storage: Where load balancing and surge protection are ongoing requirements.
- Logistics and retail: Where BESS reduces operating costs and supports on-site EV charging fleets.
energy storage
Key applications
BESS helps your energy go further and is ideal for:
- Peak shaving: Many utility tariffs include demand charges based on your highest energy spike recorded in a billing period. A BESS detects these spikes and discharges stored power to reduce grid draw at critical moments, avoiding punitive charges.
- Load shifting: Batteries charge during off-peak hours when grid electricity is cheapest, then discharge during peak tariff periods – reducing reliance on expensive grid power at the times it matters most.
- Renewable energy integration: Storing surplus energy from on-site solar means clean energy isn't wasted. Batteries supply power during low-generation periods, at night, or on overcast days.
- Backup power and resilience: In the event of a grid outage, a BESS can switch instantly to support critical infrastructure and keep operations running.
- Grid services and revenue: Businesses can participate in demand-response programmes or provide frequency regulation services to grid operators – generating revenue from stored energy capacity.
- EV charging support: A BESS can offset the power demands of commercial EV charging infrastructure, reducing the risk of grid overloads and avoiding costly connection upgrades.
energy strategy
Is battery storage right for your business
BESS works best when there's a clear use case – whether that's cutting peak demand charges, maximising returns from existing solar, protecting against outages, or supporting EV infrastructure.
To assess whether it's worth it for your site, the key factors are your current electricity spend, whether you already have on-site renewable generation, and what your primary goal is. We review all of this as part of our assessment, model the financial case, and give you a clear picture of projected savings and payback before any commitment is made.