Power station runtime calculator
Add your appliances, quantities and daily hours. Adjust the assumptions below to estimate energy demand; use the multi-brand advisor to compare suitable solutions.
How to use the calculator
Use measured consumption or the appliance label whenever possible. Library wattages are examples, not measurements of your specific equipment.
For cycling appliances, use average power over the full period OR running power over the actual running hours. Do not apply the same cycle reduction twice.
Solar production depends on location, season, shading and compatible charging hardware. Efficiency and reserve are planning assumptions, not guaranteed performance.
| Device | Typical watts | Qty | Hours/day |
|---|
How to interpret the results
Energy in Wh determines the battery needed. Continuous power and startup peaks in W must also fit the inverter: enough battery capacity alone does not prove compatibility.
Estimates do not guarantee uninterrupted power. Confirm voltage, connections and manufacturer limits. Medical equipment needs a professionally validated backup plan.
Worked energy examples
Illustrative loads only; not product recommendations or promises of solar autonomy.
| Equipment | Average power | Hours | Energy |
|---|---|---|---|
| Router | 10 W | 8 h | 80 Wh |
| Laptop | 60 W | 4 h | 240 Wh |
| Fridge (average load) | 50 W | 24 h | 1200 Wh |
Watts, watt-hours and usable energy
Energy = average watts × hours × quantity. For example, 100 W for 5 hours uses 500 Wh.
Illustration: a 1,000 Wh battery at 85% efficiency with a 10% reserve provides about 765 Wh. At a steady 100 W, that is about 7.65 hours, before any additional standby losses. Actual results vary with temperature, battery condition and load.