Generator Wattage Calculator
Estimate running watts, starting surge, and a practical generator size for selected backup loads.
Use case: Sizing a generator around selected home, garage, or campsite loads.
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Backup Power Calculators
Estimate backup power needs for generators, portable power stations, refrigerator runtime, solar charging, UPS devices, CPAP battery backup, RV camping loads, and home outage planning.
Portable Power Station Runtime Calculator
Estimate how long a portable power station can run a load after efficiency losses and reserve.
Use case: Checking how long a battery station may run a known device load.
Open calculatorRefrigerator Backup Time Calculator
Estimate refrigerator or freezer backup time using battery capacity, duty cycle, and inverter efficiency.
Use case: Estimating electrical runtime for a refrigerator or freezer during an outage.
Open calculatorSolar Panel Charging Time Calculator
Estimate solar charging time from battery size, charge target, panel watts, sun hours, and system efficiency.
Use case: Planning solar recharge time for a battery or portable power station.
Open calculatorUPS Runtime Calculator
Estimate UPS runtime for routers, computers, NAS devices, and other small electronics.
Use case: Estimating backup time for routers, computers, NAS devices, and electronics.
Open calculatorCPAP Battery Backup Calculator
Estimate CPAP backup runtime and nights from battery capacity, humidifier use, reserve, and efficiency.
Use case: Estimating CPAP power needs for backup battery planning only.
Open calculatorRV / Camping Power Calculator
Estimate daily campsite energy use, trip battery needs, and optional solar recharge.
Use case: Estimating daily and trip energy use for camping or RV devices.
Open calculatorHome Outage Backup Planner
Plan 24, 48, or 72 hour backup needs for critical home loads using battery and generator estimates.
Use case: Planning 24, 48, or 72 hour backup needs for critical household loads.
Open calculatorBackup power guide library
Pair calculators with guides for appliance wattage, outage planning, battery sizing, solar charging, UPS runtime, and generator comparisons.
Planning limits
These calculators provide estimates only. They do not replace device labels, manuals, local code requirements, manufacturer guidance, professional electrical advice, medical advice, or food safety guidance.