Quote:
Originally Posted by Piotrsko
is this a financial decision or a practical engineering one? Dc to Ac then back to Dc conversions are really lossy and expensive for all the pieces parts involved. Suppose you could build your own supercap voltage multiplier and PWM stepdowns, but all the voltage multiplier circuitry I have experienced is not that high currents and really fussy about parameters.
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I'm doing something similar but I already have a 12V setup because I'm starting with an ambulance. There is a charger for shore power and a full sine wave invertor that powered the medical equipment.
The sticking point for me was how would I charge the 12V vehicle system from the 48V house batteries. There are 48V to 12V DC - DC inverters but they cost quite a bit and I'm not keen on finding room for even more hardware and cabling. I'm planning on just using a standard 120V to 12V battery charger plugged into the house system. Yes it is very inefficient but I already have on and I'm running a very oversized 48V system.
I'm also a fan of K.I.S.S.