Power supply is probably the wrong word, it's 48/24v dcdc converter. Once the unit is up and running the unit only draws <1Amp and everything works fine. Even If I put it on a small 9Ahr battery it will drop the voltage during startup 1-2Volts on the battery.
I've tried a 300W converter of the same brand and next i'll try a different brand.
Is there a different onboard psu for the AC model vs. dc model or is it the same unit with a different plug?