Enter the power, voltage, efficiency, and length into the calculator to determine the inverter cable size.

Inverter Cable Size Formula

The following formula is used to calculate the inverter cable size. 

CS = (P / (V * E)) * L

Variables:

  • CS is the cable size in square millimeters
  • P is the power of the inverter in watts
  • V is the voltage of the inverter in volts
  • E is the efficiency of the cable (usually around 0.85 to 0.95)
  • L is the length of the cable in meters

To calculate the inverter cable size, divide the power of the inverter by the product of the voltage and the efficiency of the cable. Then, multiply the result by the length of the cable. The result will be the required cable size in square millimeters.

What is a Inverter Cable Size?

An inverter cable size refers to the thickness and length of the cable used to connect an inverter to a battery or a power source. The size of the cable is crucial as it affects the efficiency and performance of the inverter. A cable that is too thin or too long may result in power loss due to resistance, while a cable that is too thick may be unnecessarily expensive and difficult to install. The appropriate cable size depends on the power output of the inverter and the distance from the power source.

How to Calculate Inverter Cable Size?

The following steps outline how to calculate the Inverter Cable Size.

  1. First, determine the power of the inverter (P) in watts.
  2. Next, determine the voltage of the inverter (V) in volts.
  3. Next, determine the efficiency of the cable (E).
  4. Next, determine the length of the cable (L) in meters.
  5. Next, gather the formula from above = CS = (P / (V * E)) * L.
  6. Finally, calculate the Inverter Cable Size.
  7. After inserting the variables and calculating the result, check your answer with the calculator above.

Example Problem : 

Use the following variables as an example problem to test your knowledge.

Power of the inverter (P) = 500 watts

Voltage of the inverter (V) = 220 volts

Efficiency of the cable (E) = 0.95

Length of the cable (L) = 10 meters