Peak demand is an important part of a commercial electric bill, and understanding it can help businesses manage energy costs more effectively.
What is Peak Demand?
Peak demand refers to the highest amount of electricity a business uses at one time during a billing period. Utilities measure this level of demand because supplying electricity during these peak moments requires additional capacity.
In simple terms, peak demand is about how much power is needed at once, not just how much energy is used over the month.
Why Peak Demand Matters
Commercial members are often billed for both:
- Total energy use (kilowatt-hours, kWh)
- Peak demand (kilowatts, kW)
Even if a peak only happens briefly, it can affect demand charges for the entire billing cycle.
What Can Cause High Peak Demand?
Peak demand can increase when several systems operate at the same time, such as:
- Heating and cooling equipment
- Refrigeration systems
- Large motors or machinery
- Lighting and other building loads
These overlapping uses may create short periods of higher demand.
Ways to Manage Peak Demand
Many businesses can reduce peak demand through strategies such as:
- Adjusting equipment schedules
- Staggering start-up times for large systems
- Using energy management systems to monitor usage
- Participating in utility demand response programs
These approaches may help lower demand charges over time.
Peak demand is a key factor in commercial energy costs. By understanding when demand is highest and taking steps to manage it, businesses may be able to improve efficiency and reduce monthly utility expenses.