What size power station do you need?
Check what you want to power and how long you need it. The plate computes continuous watts, start-up surge, and the battery capacity (watt-hours) to buy — accounting for inverter loss and a usable-charge margin.
Capacity includes inverter loss (~15%) and a usable-charge margin, so the station isn't run flat. A solar panel or vehicle charge extends runtime past this number.
Power stations that fit
Right size: Extra-large (≈3,600Wh) · 3,600W
A fridge and essentials for a day or more, a 120V window AC, a home office through a long outage. Approaching generator money; the value comes from pairing it with solar so it refills each day.
See current prices on AmazonOne size up: Expandable home backup (≈6,000Wh+) · 5,000W
Backing up whole circuits through a transfer switch; add battery modules for days of autonomy, especially with solar. A home-backup system, not a grab-and-go unit. For 240V loads or true whole-home coverage, compare against a standby generator.
See current prices on AmazonHow power-station sizing works
A portable power station is a battery plus an inverter, so sizing it means answering two different questions at once. First, can it deliver the power? — its continuous watt rating must cover your running load, and its surge rating must cover the single largest start-up spike, exactly like a generator. Second, can it store the energy? — its capacity in watt-hours must hold your running watts multiplied by the hours you need, plus the roughly 15% lost turning battery DC into household AC.
We size capacity so the station isn't run flat (batteries last longer with charge to spare) and add the inverter loss, which is why the recommended watt-hours run above a simple watts-times-hours guess. A solar panel or a vehicle charge effectively removes the runtime ceiling in daylight — the number here is what gets you through without a recharge.