Camping Battery Calculator

Camping Battery Calculator

Estimate how long your camping battery may last based on your fridge, extra devices and available solar input.

This calculator is designed for typical 12V camping systems including LiFePO4 batteries, portable solar panels and compressor fridges.

How to use this calculator

• Enter your battery size in amp hours (Ah).
• Set the usable battery percentage. Most lithium batteries safely use 80–90%.
• Enter your fridge average amp draw and hours used.
• Add one extra item such as lights, fans or a CPAP machine.
• Enter your solar panel size and estimated good sun hours.
• Press Calculate to estimate battery runtime and solar recovery.

Results are estimates only. Actual performance depends on weather, temperature, battery condition, panel angle and appliance efficiency.

Battery size (Ah) Usable battery percentage (%)

Fridge

Fridge average draw (amps) Fridge hours per day

Extra item

Item name Item draw (amps) Hours used per day

Solar

Solar panel size (watts) Good sun hours per day

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More Tiny Camper Tools

Practical calculators and camping tools for teardrop campers, 12V systems and off-grid travel.

• Camping Battery Calculator — Estimate battery runtime and daily power usage.
• Solar Recovery Calculator — Estimate how long solar may take to replace used power.
• Battery Voltage Guide — Understand lithium battery voltage and voltage sag.
• Trip Cost Calculator — Estimate fuel, camping and travel costs.
• Back to Tiny Camper's Toolbox

Results are estimates only and should be used as general guides. Actual camping performance depends on weather, equipment, battery condition and real-world usage.

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