Power Station Runtime Calculator
Estimate how long a 300Wh, 500Wh, or 1000Wh power station may run a fridge, CPAP, router, fan, or laptop.
Open calculatorFree planning tools
Portable power and solar calculators
Start with the load, runtime, battery, or panel you already know. Each tool shows the assumptions behind the result and the hardware limits to verify next.
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Runtime and outage backup
Start with a device load and the hours you need, then check capacity and surge.
Refrigerator and Freezer Outage Backup Calculator
Estimate refrigerator or freezer runtime from running watts, duty cycle, surge, battery size, and outage target.
Open calculatorOutage Backup Load Planner
Pick outage loads, adjust watts and hours, then get a rough power station size class before shopping.
Open calculatorPower Station Size Calculator
Estimate a portable power station size class from device watts, hours, days, reserve, and extra charging needs.
Open calculatorStarlink Power Station Runtime Calculator
Estimate runtime for a satellite-internet setup and the solar panel size that may help refill the battery.
Open calculatorCPAP Power Station Runtime Calculator
Estimate how many nights a power station may run a CPAP, including humidifier settings and usable battery capacity.
Open calculatorMini Fridge and 12V Cooler Runtime Calculator
Estimate portable power station runtime for a mini fridge, 12V fridge, or electric cooler using duty cycle and battery watt-hours.
Open calculatorSump Pump Backup Power Calculator
Estimate sump-pump battery capacity and output requirements from duty cycle, outage hours, inverter efficiency, editable inverter idle draw, reserve, and surge watts.
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Panels, batteries, and recharge
Translate battery capacity, panel output, and input limits into a compatible charging plan.
Solar Recharge Time Calculator
Estimate how long a 100W, 200W, or larger panel might take to refill a portable power station.
Open calculatorWhat Can a 100W Solar Panel Run?
Compare daily 100W panel energy with a device's watts and runtime after collection losses, output losses, and reserve.
Open calculatorSolar Panel Compatibility Checker
Screen panel or array specs against a power station's MPPT/input voltage range and maximum Voc, current, and watts, including a cold-weather Voc allowance.
Open calculatorAmp Hours to Watt Hours Calculator
Convert amp hours to watt hours with the formula Wh = Ah x Volts, plus common 12V, 24V, and 48V battery examples.
Open calculatorRV Boondocking Daily Watt-Hour Calculator
Estimate daily RV boondocking watt-hours from lights, fan, fridge, laptop, phone charging, and battery reserve.
Open calculator12V Shed Lighting Solar Calculator
Estimate nominal battery watt-hours, amp-hours, and panel watts for 12V shed lighting with explicit usable-capacity and output-loss assumptions.
Open calculatorSecurity Camera Solar Sizing Calculator
Estimate nominal battery and panel size for low-voltage security cameras with explicit usable-capacity, output-efficiency, and solar-collection assumptions.
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Home solar quote checks
Use modeled production and complete monthly costs to sanity-check a home solar proposal.
Solar Production Estimator
Use PVWatts-backed location and system inputs to estimate monthly and annual solar production.
Open calculatorSolar Lease Reality Check Calculator
Compare a solar payment plus the remaining utility bill against the old bill and a 10% investment scenario.
Open calculatorBetter inputs, better estimates
Measure first when the result matters
A plug-in watt meter, EnergyGuide label, or current equipment manual is usually more useful than a generic appliance preset. The calculators keep every input editable for that reason.
How results are built
See the formulas, default assumptions, source hierarchy, review dates, and limits used across Solar Gear Spot.
Read the methodology