Calculateur d’autonomie pour station électrique

How the runtime estimate works

The basic calculation is battery capacity in Wh x efficiency x remaining reserve / average load in W. Capacity estimates available energy. Output wattage is a separate limit: the station must also support the device's running watts and startup demand.

Use average load for devices that cycle

Refrigerators, coolers, pumps and some CPAP configurations do not draw one fixed wattage continuously. A measured average over time gives a better estimate than using only the highest label value. Always check startup demand separately.

FlashFish capacity examples

Model coverage is based on verified technical data. Product availability may change; check the linked product page for current sales status.

Frequently asked questions

Why is the result lower than capacity divided by watts?

The calculator includes adjustable conversion efficiency and reserve. Real systems lose some energy through conversion, electronics, cables and standby operation.

Does a runtime result mean the device is compatible?

No. Check rated output, peak or startup demand, outlet type, voltage, frequency and device instructions separately.

Can I use this estimate for medical or life-critical equipment?

Do not use a general calculator as the only basis for life-critical planning. Follow the equipment manufacturer and qualified professional guidance and maintain an appropriate backup plan.

Does solar charging extend runtime?

It can, but solar input varies with weather, season, shade, panel angle and station input limits. Do not add rated panel watts as if they were constant all day.