Free calculators that answer one question each, show their math, and don't ask for your email. Built for blackouts, vans, RVs, boats, homelabs and off-grid setups.
What size power station rides out a blackout? Pick your appliances, set the outage length, get watt-hours with honest headroom.
LiveBattery bank, solar array, inverter and MPPT controller — sized from your real daily usage, DC and AC handled properly.
LiveHow long will your router, server or desk survive? Includes battery ageing, inverter losses, and the size you'd need for a target runtime.
In developmentDaily price tracking on major battery power stations — real price history and cost per Wh, not fake MSRP cuts.
35 guidesSpecific computed answers: what size power station for a CPAP, a fridge through a power cut, a weekend off-grid, and more.