Maximum demand quantifies the highest sustained load and drives billing, equipment sizing, and operational decisions. Accurate measurement (appropriate interval choice), attention to power factor and diversity, and active demand-management strategies are the primary levers to control MD and its financial and technical impacts.
Diversity is the engineering principle that not all loads operate at their peak capacity at the same time—sockets are not all loaded to maximum, kitchen appliances run intermittently, and office equipment cycles on and off. Ignoring diversity leads to grossly oversized feeders and transformers; applying appropriate diversity produces a that is both safe and economical.
: The ratio of the maximum demand to the total connected load (always ≤1is less than or equal to 1 🛠️ The 4 Calculation Methods maximum demand calculation
: Restricting the demand by using a protective device (like a circuit breaker) with a fixed rating that the installation cannot exceed. Assessment
In the world of electrical engineering and power distribution, two numbers dominate your electricity bill: the total kilowatt-hours (kWh) consumed and the . While energy usage (kWh) pays for the total work done by electricity, the Maximum Demand pays for the peak rate at which you consume that energy. Maximum demand quantifies the highest sustained load and
For HVAC (often 40-60% of MD), make ice or chill water at night. Use that stored cooling during daytime peak hours. The chiller compressor runs at night (off-peak), reducing daytime MD by hundreds of kW.
: Determining demand based on a fixed protective device (like a circuit breaker) that limits the total available current to a specific value. Ignoring diversity leads to grossly oversized feeders and
Load factor is the ratio of the average load over a certain period to the maximum load in that designated period:
When a facility's demand spikes near its calculated maximum threshold, an intelligent controller commands an on-site battery bank to discharge, supplying the excess peak power locally. This effectively "shaves" the peak demand registered by the utility meter, lowering infrastructure requirements and reducing monthly utility demand charges.