Perform fast calculations with our user-friendly online calculator! Conveniently crunch numbers and solve equations instantly. Ideal for quick math tasks, our tool simplifies your daily computations effortlessly. Try our intuitive calculator for accurate results on the go!
Calculate inverter load, battery backup time, and power capacity easily with our free inverter load calculator for home and solar systems.
An inverter is an essential device for homes, offices, and small businesses, especially in areas where power cuts are common. It helps you run important appliances when electricity is not available. But choosing the right inverter is not easy if you do not know your actual power needs.
This is where an inverter load calculator becomes useful. It helps you find how much load your inverter can handle and how long your battery can provide backup. We developed this online tool to make inverter load calculation simple, fast, and accurate for everyone.
With our calculator, you can easily calculate inverter load capacity, battery backup time, and total power consumption in just a few seconds.
An inverter load calculator is an online tool that helps you calculate the total power required by your appliances. It also estimates how long your inverter battery can run those devices.
By using this calculator, you can:
This tool is useful for home users, shop owners, solar users, and anyone who depends on backup power.
To calculate inverter load capacity, you must first know how much power your appliances use.
Each electrical device has a watt rating. When you add all appliance wattages together, you get the total load.
The basic idea is simple.
Total Load = Sum of Power of All Appliances
For example, if you use:
Then your total load is:
80 + 120 + 40 = 240 watts
Your inverter should be able to handle more than this value. It is always better to keep some safety margin.
Our inverter load calculator uses the standard industry formula to calculate backup time.
The formula in simple text format is:
Backup Time in Hours = (Battery Capacity in Ah × Battery Voltage × Number of Batteries × Depth of Discharge × Inverter Efficiency) ÷ Total Load in Watts
Where:
This formula gives a realistic estimate of how long your inverter can run your devices.
Using our online inverter load calculator is very easy. You do not need any technical knowledge.
Within seconds, you will see:
This helps you plan your power usage better.
Let us understand the calculation with a simple example.
Suppose you have:
Battery capacity = 150Ah
Battery voltage = 12V
Number of batteries = 1
Depth of Discharge = 0.5
Inverter efficiency = 90%
Total load = 300W
Now apply the formula.
Battery Energy = 150 × 12 × 1 = 1800Wh
Usable Energy = 1800 × 0.5 = 900Wh
Effective Energy = 900 × 0.9 = 810Wh
Backup Time = 810 ÷ 300 = 2.7 hours
So, a 150Ah battery can run a 300-watt load for about 2 hours and 40 minutes.
An inverter load calculator is an essential tool for anyone using backup power. It helps you avoid overloading, improves battery life, and ensures reliable performance.
Our online inverter load calculator is built to provide accurate, fast, and easy results. Whether you want to know how long a 150Ah battery will last, how much load your inverter can take, or which inverter is best for your home, this tool gives you clear answers.
Use it before buying an inverter or battery and make a smart decision.
Add the watt rating of all appliances. The total value is your inverter load. Your inverter should be rated higher than this number.
A 150Ah 12V battery can run a 300W load for about 2.5 to 3 hours, depending on battery condition and efficiency.
Yes, multiple batteries can be connected in series or parallel to increase voltage or capacity.
Yes, higher efficiency means less energy loss and longer backup time.
Yes, this calculator works for home inverters, solar inverters, and hybrid systems.