Battery planning
Battery sizing calculator
Add the devices that actually run in your rig and size your battery bank around them instead of guessing from a product page.
Battery sizing calculator
Add the loads you actually use in a normal day. The estimate updates as soon as the list changes.
Battery bank estimate
Daily use
1410Wh
Required capacity
275Ah
100Ah batteries
3
Think in daily watt-hours first
Battery sizing gets easier once you stop comparing batteries and start comparing usage. The calculator totals the watt-hours your appliances burn in a day, then converts that into battery capacity based on voltage and chemistry.
This is where a lot of off-grid frustration starts: RVers buy a bank based on amp-hours alone, then discover that their fridge, work setup, and inverter loads chew through that reserve much faster than expected. Daily usage is the number that keeps the rest honest.