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To
Ah
.com
Off-Grid Battery Sizer
Full Sizer ↗
Presets:
❄️ Fridge (45W)
📡 Starlink (25W)
💻 Laptop (65W)
💨 CPAP (30W)
🍳 Induction (1.8kW)
1. Power (Watts)
Watts
2. Run Time
24h / day
3. System Voltage
12V
Vans & RVs
24V
Cabins & Boats
48V
Whole Home
4. Battery Chemistry
LiFePO4 Lithium
80%–100% Usable DoD
Lead-Acid / AGM
50% Max Safe DoD
Min. Battery Needed
860
Ah
(10.3 kWh)
@ 12V DC
≈ 4× 200Ah LiFePO4
Daily Energy
7,200 Wh
Daily Draw
687 Ah
Min. Solar
2,412 W
LiFePO4:
860 Ah
• AGM Equivalent:
1,375 Ah
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