One reason I choose 24v system is :
12v charge Victron controller (for 1,200w) charge controller and Victron
inverter/charge (3,000w) is about $1,000(with taxes) more expensive than 24v 's counterpart, not to mention the extra cost on wires etc.
While 24v to 12v converter is only one bucks.
Originally Posted by DavidEM
Going to 24 volts will save a little on the solar controller and a little in wire size, but will cost a lot for a 24 volt x 12 volt charger. I wouldn't do it unless you use a lot of AC and you will have a 24 volt converter.
But in any case, what kind of batteries are you considering. If you are ok with FLAs then 12V golf cart batteries are the cheapest $/kWhr.