New to portable power? Start with the jobs you need your battery to do, rather than the biggest number on the box.
1. List what you want to power
Write down each device’s running watts and how many hours you expect to use it. Check the device label or manufacturer documentation. Appliances with motors may also need extra startup power.
2. Separate watts from watt-hours
Watts (W) describe power output. Watt-hours (Wh) describe stored energy. Your station must support the devices’ combined output demand and store enough energy for your intended use.
3. Estimate runtime carefully
A starting estimate is usable battery energy in watt-hours divided by average device draw in watts. Inverter losses, temperature, standby consumption and appliance cycling affect the result. Advertised capacity is not all available at the AC sockets.
4. Check how you will recharge
Compare wall, vehicle and solar charging. For solar, match the station’s stated voltage, current, connector and input limits to compatible panels. Panel wattage alone does not establish compatibility.
5. Check practical details
Look at weight, ports, noise, warranty terms and the manufacturer’s safety instructions. For RV shore-power or home-circuit connections, confirm the correct equipment and use a qualified professional where required. Never backfeed a household socket.
Read more about Portable Power Expert.