Maximum Demand Peak Shaving: How Businesses Can Save Money
Maximum demand peak shaving means reducing the highest level of power drawn from the grid — when a business approaches a demand peak, the BESS discharges stored electricity so the grid sees a lower, cheaper peak.
Why businesses have demand peaks
Commercial and industrial sites often have demand peaks because many systems operate at once — a factory starting multiple machines, a mall running air-conditioning, lighting, escalators and tenants together, or a cold store cycling compressors. Common causes include machine start-up, production-line operation, HVAC and chillers, refrigeration, compressed air, pumps and motors, EV chargers, and data-centre cooling.
How peak shaving saves money
Peak shaving saves money by reducing maximum demand charges. If a business lowers its recorded maximum demand, it may reduce the demand portion of the bill. BESS is ideal because it responds quickly — instead of manually switching equipment, the system discharges automatically when demand rises above a preset level.
A worked example
Imagine a factory with a normal load of 900 kW that occasionally peaks at 1,300 kW. The BESS is designed to discharge 400 kW during the peak period. Without BESS the grid demand may reach 1,300 kW; with BESS it may only reach 900–1,000 kW. The business still operates normally, but the recorded peak demand is reduced — that is the financial logic behind peak shaving.
EMS: the brain behind peak shaving
The EMS monitors the site load and controls the battery, deciding when to charge, when to discharge and how much power to release. Without intelligent EMS the battery may discharge too early, too late or at the wrong level. A strong EMS protects savings and improves performance.
Which businesses benefit most
Peak shaving suits sites with high or irregular demand patterns, including:
- Manufacturing and food-processing plants
- Cold storage facilities
- Shopping malls and hotels
- Hospitals
- Office towers and data centres
- Logistics warehouses and industrial parks
Frequently Asked Questions
It is reducing peak grid demand by using stored energy during high-load periods.
BESS discharges electricity when site demand rises, reducing the power drawn from the grid.
Yes. If maximum demand charges are significant, peak shaving can reduce monthly electricity costs.
Yes. Factories with machinery, motors, compressors or production peaks are often suitable.
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