So I'm trying to put together a system of an MPPT controller, an inverter (for a little bit of 110V power)and two pairs of serially-wired 6v golf cart batteries in parallel (or do I have that backwards?) to create a 12v system. There will no be a tie-in to a vehicle battery; this is essentially a stand-alone system to be housed in our short-bus RV.
1. The panel has 24v output so the first stumbling block is choosing a charge controller. Math tells me I need a controller that can handle at least 10 amps - is there a suitably-sized MPPT controller in the $100-200 range that will automatically drop the voltage to 12 volts, removing the need for a transformer in there?
2. Our overall 110V needs are quite modest (charging ability for laptop and GPS, maybe occasional use of a DVD player & small flatscreen TV) so a smaller inverter should be fine - is 600 watts too small?
Thanks in advance for any/all help... I get a little lost going much beyond V=IR.
