I am currently running a small 24v emergency power solar system. I have a 40a MPPT charge controller with (4) 12v flooded lead-acid batteries in a 2S-2P configuration. I have a need for both 24v and 12v power during outages.
The 24v is obviously easy, but am having a problem getting a decent 12v buck converter to suit my power needs that doesn't cost an arm and a leg.
I was wondering if it would be possible to design a circuit that would take (2) 12v inputs and seamlessly switch between them constantly balancing the voltage on the two 12v banks, all the while outputting an uninterrupted high current (30+ amps) 12v output.
I know it's a lot to ask, and I realize the parts might cost more than a pre-made buck converter but I figured it would be worth a shot and I might learn something!