Battery Bank Sizer
Calculate the right battery bank size for your off-grid system based on your daily energy usage, autonomy requirements, and battery specs.
Daily Appliance Usage
Appliance
Watts
Hrs/Day
Qty
Wh/Day
150 Wh
90 Wh
240 Wh
540 Wh
Total: 1020 Wh/day
System Configuration
System Voltage
2days
12357
90%
80%85%90%95%98%
10°C
-20°C0°C10°C25°C40°C
Battery Specs
Quick Presets
Ah
V
90%
10%50%80%100%
Sizing Result
Batteries Needed
2
× 200Ah
Total Capacity
400
Ah
Total kWh
5.1
kWh
Usable Autonomy
3.9
days
Daily Usage1133 Wh
Daily Ah Draw88.5 Ah
Required Capacity203 Ah
Efficiency Loss113 Wh/day
Temp Derating3.0%
Required kWh2.60 kWh
Expected Cycle Life4,000 cycles