CPAP Power Station Runtime Calculator
Estimate how many nights a power station may run a CPAP, including humidifier settings and usable battery capacity.
Open toolSolar gear tools
Quick calculators before you buy.
Use these rough planning tools to narrow the size class, then verify the exact specs on the manufacturer page before spending money.
Refrigerator and Freezer Outage Backup Calculator
Estimate refrigerator or freezer runtime from running watts, duty cycle, surge, battery size, and outage target.
Open toolStarlink Power Station Runtime Calculator
Estimate runtime for a satellite-internet setup and the solar panel size that may help refill the battery.
Open toolOutage Backup Load Planner
Pick outage loads, adjust watts and hours, then get a rough power station size class before shopping.
Open toolPower Station Runtime Calculator
Estimate how long a 300Wh, 500Wh, or 1000Wh power station may run a fridge, CPAP, router, fan, or laptop.
Open toolSolar Recharge Time Calculator
Estimate how long a 100W, 200W, or larger panel might take to refill a portable power station.
Open toolSolar Production Estimator
Use PVWatts-backed location and system inputs to estimate monthly and annual solar production.
Open toolRV Boondocking Daily Watt-Hour Calculator
Estimate daily RV boondocking watt-hours from lights, fan, fridge, laptop, phone charging, and battery reserve.
Open tool12V Shed Lighting Solar Calculator
Estimate battery amp-hours and solar panel watts for simple 12V shed lighting.
Open toolSecurity Camera Solar Sizing Calculator
Estimate solar panel and battery size for a low-voltage security camera or small Wi-Fi camera setup.
Open toolSump Pump Backup Power Calculator
Estimate battery watt-hours for a sump pump outage backup using pump watts, duty cycle, outage hours, and surge.
Open toolAmp-Hours to Watt-Hours Calculator
Convert amp-hours to watt-hours and estimate usable energy after reserve.
Open toolSolar Panel Compatibility Checker
Check whether a portable solar panel is within a power station's watt, voltage, and current input limits.
Open toolPower Station Size Calculator
Estimate a portable power station size class from device watts, hours, days, reserve, and extra charging needs.
Open toolMini 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 toolHow these calculators help with solar gear research
Most budget solar mistakes start with sizing. A power station can have enough capacity but too little surge output, a solar panel can be larger than the station's input limit, and a home solar estimate can look good before shade or roof direction is checked. These tools give you a first-pass number so the next buying decision starts from the load, recharge time, or production target instead of a listing headline.