Vigo
Solar Addict
Thanks for continuing to come back with more info/testing as you try things.. I personally hate to see an electrical mystery left hanging.
I don't disagree that store-bought or factory-made wires are 'unlikely' to be a problem, but I also think it's 'unlikely' a 3kw inverter with a 1.5-2X surge capacity hooked to a 5kwh battery couldn't start a 14k btu or whatever it was, so we are already sort of in the weeds to begin with.
You can do the voltage measurements with a regular meter, it's just that a meter with min-max doesn't require you to be looking directly at it as the event occurs. It can turn '3 handed operations' back into 2 handed ones.
I understand the AC startup is a transient situation that doesn't even give the meter reading time to settle on the screen, so you may try just loading the inverter close to 100% with an ongoing load and then take the voltage readings at a less hectic pace, just to give an idea whether there is or is not a voltage drop issue in the cabling.
I don't disagree that store-bought or factory-made wires are 'unlikely' to be a problem, but I also think it's 'unlikely' a 3kw inverter with a 1.5-2X surge capacity hooked to a 5kwh battery couldn't start a 14k btu or whatever it was, so we are already sort of in the weeds to begin with.
You can do the voltage measurements with a regular meter, it's just that a meter with min-max doesn't require you to be looking directly at it as the event occurs. It can turn '3 handed operations' back into 2 handed ones.