Calculate Off Grid usage for your adventures
This calculator is designed to help you estimate your daily energy usage while living off-grid in a motorhome, campervan, caravan, or boat.
By entering your appliance usage, it provides tailored recommendations for the ideal inverter size, battery capacity, and solar panel array needed to keep you powered and self-sufficient wherever your journey takes you.
Off-Grid Usage Calculator (12V & 230V)
Plan your daily energy usage and see how solar affects your battery.
12V Appliances
Estimate use in hours and minutes. If your appliance isn’t listed, pick a similar rating.
Total Daily DC Amp-Hours: 0 Ah/day
230V Appliances
Estimate use in hours and minutes. If your appliance isn’t listed, pick a similar rating.
Total Daily AC Amp-Hours (battery): 0 Ah/day
AC Ah ≈ Wh ÷ 10.8 (12 V battery with ~90% inverter efficiency).
Solar Panel Selection
Select your solar size. Calculations assume 4 hours usable sunlight per day (UK average over seasons).
Net Ah (Solar − Load): If positive, you’re generating more than you use (battery charging).
Tap a size to apply. Tap again to change.
Estimated Solar Charge: 0 Ah/day
Estimated Battery Impact (1 Day):
Net Ah (Solar − Load): 0 Ah/day
Battery is: Balanced
Total Wh: 0 Wh/day
Total Ah: 0 Ah/day