Plan reliable power for demanding projects, balancing output, cost, and risk daily. Enter system details to see energy, fuel, savings, and reports fast onsite.
Choose an energy source and enter site conditions. Values are adjustable for planning, tendering, and daily operations.
Sample scenarios show how different site energy sources perform under typical conditions.
| Scenario | Key Inputs | Daily Energy (kWh/day) | Period (30 days) (kWh) |
|---|---|---|---|
| Diesel generator | 100 kW, load 0.65, derate 0.95, 10 h/day, availability 0.95 | 586.63 | 17,598.75 |
| Solar PV | 50 kW, 5.0 sun hours, PR 0.80, shading 0.05, availability 0.95 | 144.40 | 4,331.88 |
| Wind turbine | 30 kW, capacity factor 0.30, availability 0.95 | 205.20 | 6,156.00 |
Effective kW = Rated kW × Load Factor × Derate × Availability
Daily kWh = Effective kW × Run Hours per Day
Daily kWh = PV kW × Peak Sun Hours × Performance Ratio
Apply (1 − Shading Loss) × Availability for practical output.
Daily kWh = Rated kW × Capacity Factor × 24 × Availability
Capacity factor reflects wind resource over time.
Period kWh = Daily kWh × Days. Energy value uses electricity rate. Generator fuel uses Fuel (L) = kWh × (L/kWh). Emissions follow the selected factors.
Construction sites depend on continuous electricity for lighting, pumps, hoists, welding, ventilation, and temporary offices. An energy production plan reduces downtime, protects equipment, and improves bid accuracy by translating nameplate ratings into realistic daily kilowatt-hours. This calculator combines availability with source-specific performance drivers so you can forecast output for a day, a month, or a project phase.
Start by selecting the power source that best matches your jobsite strategy. For diesel generators, the key drivers are rated power, average load factor, derating, and run hours. In practice, altitude, high ambient temperature, and aging can reduce usable power, while low loading can increase fuel consumption per delivered kilowatt-hour. The calculator reports fuel liters and operating cost using specific fuel use and fuel price inputs, helping teams compare rental options and refueling logistics.
For solar, the model uses installed capacity, peak sun hours, performance ratio, shading loss, and availability. Performance ratio represents inverter efficiency, wiring losses, temperature effects, soiling, and mismatch losses. Temporary shading from cranes or material stacks can be significant on compact sites, so entering a shading loss provides a conservative plan. For wind, rated power and capacity factor estimate average production over a full day, reflecting the local resource rather than short-term gusts, and it should be supported by measured data or a credible site study.
Example planning case: a 100 kW generator at 0.65 load, 0.95 derate, 10 hours per day, and 0.95 availability produces about 586.63 kWh/day and 17,598.75 kWh over 30 days. With a specific fuel use of 0.27 L/kWh, fuel demand is roughly 4,751.66 liters for the period. A 50 kW solar array with 5.0 peak sun hours, 0.80 performance ratio, 0.05 shading loss, and 0.95 availability yields about 144.40 kWh/day and 4,331.88 kWh over 30 days. A 30 kW wind turbine at 0.30 capacity factor and 0.95 availability provides about 205.20 kWh/day and 6,156.00 kWh over 30 days.
Use the cost and emissions fields to translate energy into measurable business impacts. Electricity rate can represent avoided utility purchases, internal carbon cost, or a comparable value used for selection. For renewables, avoided emissions use the grid factor; for generators, emissions come from fuel. Download CSV and PDF to support planning reviews and approvals across all phases.
Availability accounts for downtime from maintenance, refueling, weather disruptions, and operational stops. Use historical site experience or contractor targets. Lower values reduce daily and period energy in every system type.
Use the expected average electrical demand divided by rated kW. If demand varies, estimate a weighted average across shifts. Very low load factors can be inefficient and may justify a smaller unit or load management.
Use local solar resource datasets, project feasibility reports, or measured irradiance from nearby stations. Enter average daily peak sun hours for the period you are planning, not a single clear day.
Performance ratio bundles real-world losses such as inverter conversion, temperature, wiring resistance, soiling, and mismatch. Typical planning values range from 0.75 to 0.85, but dusty or hot sites may be lower without cleaning.
Start with a site wind assessment, turbine curves, and nearby met data. Capacity factor represents long-term average output as a fraction of rated power, so it is usually far below 1.0 for most sites.
The rate provides a comparable value of produced energy, useful for budget comparisons against grid supply or alternative sources. It does not replace fuel cost; use it to evaluate overall energy economics and trade-offs.
No. Emissions are planning estimates based on fuel or grid factors. Regulatory reporting may require verified fuel records, engine certifications, and jurisdiction-specific factors. Use these values for screening and documentation, then refine with audited data.
Important Note: All the Calculators listed in this site are for educational purpose only and we do not guarentee the accuracy of results. Please do consult with other sources as well.