Hello efficient pv.Just on a theoretical basis. Alternators are three phase. If you wired those three phases into two 24V to 120V transformers, that would get you close to the right voltage and it would be isolated.
"No way the winding insulation gets anywhere near breakdown." Do you know this for certain? Is there any exceptions by make and model?
so if i get this right you are saying use a 12v mpp inverter powered by engine alternator to feed 220vac to a second larger 48v mpp inverter to actuallyi had a shower thought for an easy, yet probably not very efficient (but who cares lol) method to achieve charging from a vehicles engine.
if you're running an all in one inverter with a 240v/220v charger like the MPP solar range, use an appropriately sized to your alternator output 12v inverter on it. limit AC charging on all-in-one accordingly to not smoke your cars alternator.
No doubt round trip efficiency sucks, but the engines running anyways. This way you don't need dual alternators/voltage systems for your vehicles electrical, and if the "hotel" power system is far away from the engine at the other end of your RV/trailer, higher voltage means less current, smaller cables and less vdrop.
the first 12v doesn't have to be a MPP, can be anything.so if i get this right you are saying use a 12v mpp inverter powered by engine alternator to feed 220vac to a second larger 48v mpp inverter to actually
feed power to the ac panel in the boat?
Hello.That sounds interesting. Like you said, the engine is running anyway. Also, those continuous duty marine alternators that I mentioned above do come in 12v versions with higher current - not exactly double, but close.
That wouldn't work too well, power transformers are designed for 60 cycle power. The AC frequency of the alternator power depends on the speed it is turning, but will be MUCH higher than 60 cycles at any normal operating RPM.Just on a theoretical basis. Alternators are three phase. If you wired those three phases into two 24V to 120V transformers, that would get you close to the right voltage and it would be isolated.