Recently saw this https://www.mpja.com/Adjustable-DC_DC-B ... /36843+PS/ and thought it might be nice installed in the van to give the chair a rapid top up charge between places on busy days.
Would like opinions on suitability for that limited purpose, and ideal voltage and current limits for 75Ah MK gel at 38C. 10min - 1.5hour random duration. I know it isn't a proper programmable 3 or 4 stage charger. But its only $25, up to 22A, adjustable, and useful for other purposes like running my CPAP while camping.
At the end of the day when you just want to be done and home, but your chair is slow, stretching out the minutes.
Or 3rd day camping with no mains AC, and no fuel to idle through the night powering inverter and stock chair charger.
I'm willing to add a single 24v Anderson connector to the chair, but want to avoid the series/parallel plugs w jumper. The new 270A Euro 6 ECM regulated alternator tends to keep voltages on the low side, making auxiliary charging complicated.