Battery Backup Time Calculator

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Battery Backup Time Calculator

UPS · Power Bank · Solar Storage · Generator Fuel

🔋 Battery Specs

Battery Capacity (Ah)

Voltage

Battery Health: 85%

Inverter Efficiency: 85%

🏠 Appliances / Load

Total Direct Load (Watts) — or use list below

Or Add Appliances

🔋 Power Bank

Power Bank Capacity (mAh)

Charging Efficiency Loss: 15%

📱 Device

Select Device

Current Device Battery: 20%

☀️ Solar System

Battery Bank Capacity (kWh)

Solar Panel Total Output (Watts)

Average Sun Hours/Day

🏠 Consumption & Goals

Daily Consumption (kWh)

Days of Autonomy Goal (without sun)

⛽ Fuel Tank

Tank Size

Unit

⚙️ Generator Specs

Fuel Consumption Rate (at full load) Liters/hr at full load

Load Percentage: 75%