What is load factor?
Load factor is a ratio that describes how evenly a facility draws power over a billing period compared to its highest single-point demand. The formula is:
Load Factor (%) = (Average Demand ÷ Maximum Demand) × 100
Average demand is the total energy consumed in the period divided by the number of hours. Maximum demand is the highest 15- or 30-minute interval average recorded by the utility meter during the same period. Both figures use the same unit — kVA or kW — depending on how your tariff defines demand.
A load factor of 100% would mean the facility drew exactly the same power every minute of every day — perfectly flat. In practice, any facility with shifts, production cycles, or seasonal variation will be below 100%. A continuous multi-shift process runs a much higher load factor than a single-shift factory that is idle overnight, so the number only means something against your own history or your DISCOM’s incentive threshold.
The important insight is what a low load factor actually costs you. Maximum demand charges on most Indian HT and LT tariff schedules are based on the peak interval demand — the single worst 15-minute window in the billing month. A factory that draws an average of 500 kVA but has one 15-minute block at 900 kVA pays demand charges on 900 kVA, not 500 kVA (or on the tariff’s minimum billing demand, if that is higher — see how billing demand works). The lower the load factor, the larger the gap between what you pay for and what you actually use.
