PRECISION SIZING TOOL

Battery Size Calculator

Size a LiFePO4 leisure, marine or off-grid battery bank to match your real-world load. Engineered assumptions. Real TITAN batteries. No guesswork.

01 Use case
System voltage
Vehicle type

02 Appliances & loads

Pick from the library or add a custom load. Adjust hours per day and quantity for each item — we model duty cycles and inverter losses for you.

No loads added yet — tap an item below to begin.
Add a custom load
03 System configuration
Autonomy 2 days
1 day7 days
Solar input 0 W
None800 W
Reserve at journey end 15%
Drain fullyBarely used

How much capacity would you like remaining at the end of your trip? 15% is our engineering recommendation — enough headroom for cold-weather performance and cell longevity. LiFePO4 handles deep discharge well, so you can safely drain further if you need the range.