well, arduino has internal buck to 5v, but not enough current for all the 12v fets, so i have additional buck(like rons) for 5v@3a, plus i found some of the load devices(water pumps) work better at the 15v, was hoping to keep it there, plus another load device at the 24v end.... aiming for less circuitry.... I think existing plan will work fine,... now that i realize that arduino can go to 15v
.... i think i am just hooked on the idea that 2 parallel chargers is better since they would individually charge their own batteries, (and not need to send current through battery 1, just to charge battery 2 ... since there will be high(er) power draws but for smaller periods of time in the 24v circuit, at the 12v side there will be constant low power draws with additional low period(1minute every 4)-high power (12v) draws plus the 24v draws. ... so the 12v side battery will be used more, there is no reason to pass additional current through first battery... ..... this maybe a concept i should drop...
but NOW an adequate charger may be problem instead, as im not using proper chargers, actually just regular 15v power brick cos i got no 24v + ones laying around...
dont really want to spend on maintenance charger, got some 2n3055's and some adc s on arduino left , or definitely some power mosfets , or maybe some parallel lm317's, but i can just imagine what kind of heat sink required.... or what is the name of linear chips?