Energy Consumption Tool
Track and project total energy use across multiple equipment items.
Calculator
No signup required. Results are indicative—verify for your standards.
Monthly consumption: 19240 kWh
Monthly cost: ₹1,53,920
Formula
Total energy (kWh) = Σ [Power (kW) × Daily hours × Days]. Total cost = Total kWh × Tariff (₹/kWh).
Example calculation
Site with compressor 37 kW × 20 hr/day, pump 15 kW × 24 hr/day, lighting 5 kW × 12 hr/day over 26 working days: Total = (37×20 + 15×24 + 5×12) × 26 = (740+360+60) × 26 = 29,640 kWh/month.
Engineering notes
Use measured kW from power analysers where possible — nameplate kW is the maximum rated power; actual consumption at partial load may be 60–80% of nameplate. Install sub-metering on major loads to get accurate consumption data for energy audits.
When to use this calculator
- Energy audit — build bottom-up site energy model from equipment inventory and usage patterns
- New plant budget — estimate annual electricity cost for a proposed production facility during FEED
- Load shedding planning — identify which loads to shed during peak demand periods to reduce demand charges
- ISO 50001 — support energy management system with quantified consumption baselines by department
- Renewable energy sizing — determine total site consumption to size a rooftop solar or captive power plant
Frequently asked questions
- How do I measure actual power consumption vs nameplate rating?
- Use a clamp meter or power analyser connected to the equipment supply cable. Measure real power (kW), reactive power (kVAR), power factor, and current simultaneously. Compare with nameplate kW. Motors at partial load consume less than rated — a 37 kW motor at 60% load draws about 22–25 kW. For continuous monitoring, install permanent energy meters (sub-meters) on major loads.
- What is a specific energy consumption (SEC) benchmark?
- SEC = Total energy consumed / Output produced (kWh per tonne, kWh per litre, kWh per unit). It is the standard industrial KPI for energy efficiency. Compare your SEC with BEE (Bureau of Energy Efficiency) benchmarks for your industry sector. The PAT scheme sets SEC targets for designated consumers. Improving SEC means producing the same output with less energy.
- How can I reduce energy consumption without capital investment?
- Low-cost or no-cost measures: (1) Switch off equipment during non-production periods — many plants waste 10–15% of energy on idle loads. (2) Reduce compressed air pressure by 1 bar to save approximately 7% compressor energy. (3) Fix compressed air leaks (a 3 mm leak at 7 bar wastes ~2,000 kWh/month). (4) Optimise motor loading — motors at <50% load are inefficient. (5) Adjust lighting to actual needs.