It's not clear what your intention is here. Do you want to "build your own inverter"? Then, do some research on inverter circuits.
You seem to only read the last message each time you come online, My intention should be very clear if you read the Title of the post even if you havent read anything thats been said.
but let me say it, the aim is to use an audio amplifier as an inverter. you asked if I want to build my own inverter that would be yes otherwise I would just purchase one.
I have been doing research on inverter circuits for years now and have made several.
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Do you want to use an off-the-shelf power amplifier? A class-D amp makes way more sense than a class AB, as has been repeatedly noted here. But that still means you're trying to use something for which it was not really intended.
I would prefer to build my own circuit I stated that earlier in the messages but if unable to build the type I require then I would have to purchase an amplifier board/s for the purpose.
I am aware a class D amplifier makes more sence since its 90% efficient or higher and a class AB is 50% or less as was already discussed in this thread.
I am aware that an amplifier isnt intended to be used as an inverter so far no one has said that using a class D amplifier as an inverter is less efficient so I dont see any harm in trying.
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SO on the other hand even if using a power amplifier (class D) was still less efficient than using a traditional method of making an inverter it still wouldn't stop me from trying this is my hobby after all.
I can make another post about a traditional version inverter I have many designs working on but I tend to source parts before I bring it here so I can do tests as I post to make things quicker.