# How to determine the efficiency value of the inverter we design?

I designed an inverter with a maximum input voltage of 20 volts.

I want to make a specification of the efficiency of the inverter that I made using the formula efficiency = (output power / input power) * 100%.

• The problem is I don't know how to calculate the output power of my inverter. Is the output power obtained from the load voltage * the load current connected to the inverter?

• Is the input power obtained from the input DC voltage * the input DC current?

• Do you know how to calculate power the of an AC signal connected to a load? – Andy aka Sep 27 at 13:06
• I don't know about that. how to calculate it? @Andy aka – Nur Aqmarina Sep 27 at 13:14
• For DC systems it's simply DC voltage multiplied by average (DC) current. For AC systems you need to do instantaneous multiplication and then averaging to get watts. – Andy aka Sep 27 at 15:21
• It's not clear -at least to me- whether you have a working prototype or simulation and whish to measure achieved efficiency or instead you are going to estimate it analytically – carloc Sep 27 at 17:15