Hi, I just joined the group. I'm building a solar powered golf cart using a 36v (6 6v batteries in series) ezgo electric golf cart. I'm replacing the roof with a single 30 volt 300 watt solar panel (2 panels is not an option). My problem is the voltage of the panel (30v) is lower than the voltage of the battery bank (36v). Most mppt chargers as far as I know can only step down voltage and not up. I'm thinking of one of the two solutions below: 1) use a step up transformer between the pv panel and mppt charge controller. 2) use a 12v mppt charge controller and connect it a 3 parallel strings of 2 6v batteries within the 6 6v string that powers the golf cart motor. Does anyone have any thoughts on this?