I have delt with one promarine inverter
(may not have been the exact same one) and the control of it is horrible. you can't separate the charger on with inverter on. so either both are on, or off. IE you are plugged into the dock
, and the dock
loses power, it switches to inverter and kills your battery
really fast. you should be able to have a charger on but the inverter in off mode.
we ended up having to install a 2nd charger and just leave the inverter / charger off because it was a big issue at that dock location. which also means none of the outlets on board work either.. since it shuts off the pasthrough when the charger / inverter was set to off. pretty much a gongshow. and should never be on a boat. you want separate switches for charger on / off and inverter on / off
I love the magnums. easy to use. built in battery monitor
(with add on BMK)
I like the promariner ProNauticP chargers though.