Inverter Runtime Calculator

⚡ Inverter Runtime Calculator

Estimate how long you can run your appliances on battery power

🔋 Battery & Load Configuration

Select the voltage of your battery or battery bank

Volts

Enter the total Amp/Hours of your battery or battery bank

Ah
Common 12V Battery Sizes

Enter the combined wattage of appliances you plan to run

Watts
📋 View typical appliance wattages ▼
19" Color TV 100W
Computer System 300W
Power Drill 400W
Small Refrigerator 600W
Toaster 1000W
Microwave Oven 1100W
Circular Saw 1500W
Hair Dryer 1800W
Estimated Runtime
--
minutes of operating time
Based on fully charged batteries at 50% depth of discharge
Battery Energy
-- Wh
Usable Energy
-- Wh
Current Draw
-- A
⚠️ Insufficient Battery Capacity
The total Amp/Hours of your battery bank are insufficient to run this load effectively. Try adding additional batteries to your bank, or reduce the wattage of your appliances.
Enter values above to see the calculation

💡 Important Battery Tips

  • Deep cycle (marine) batteries generally have the highest reserve ratings and are capable of withstanding repeated drains and recharging
  • Engine start batteries should not be discharged below 90% charge state
  • Marine deep cycle batteries should not be discharged below 50% charge state
  • Discharging below these levels will shorten battery life per manufacturer recommendations

🔌 Commercial Use Recommendation

If you intend to use power tools for commercial use, or any load of 200W+ for more than 1 hour regularly, we recommend installing an auxiliary deep cycle battery dedicated to the inverter. This battery should be connected to the alternator through an isolator module to prevent discharging the engine start battery when the engine is off.

!