RV energy calculator
List what you run each day, add your solar, and see which Eco Battery system fits and how long it keeps you off the grid.
1Daily usage
Pick an appliance or type your own. Check "Together" for anything that may be on at the same time. That sets your inverter and battery current.
| Appliance | Together | Power | Qty | Hours/day | Watts | Wh/day |
|---|
2System capacity
Choose the battery voltage for the system and how deep you plan to discharge.
–Daily energy (Wh)
–Daily draw (Ah)
–Capacity required (Ah)
–Peak simultaneous load (W)
3Solar input
Leave panel count at 0 if there's no solar. Efficiency covers panel quality and typical weather; 100% is a perfect sunny day.
–Array size (W)
–Array current, panels in parallel (A)
–Solar harvest (Wh/day)