If you want inverter and charger reliability at a competitive price, Magnum Energy’s MS series can't be beat. Backed by a three year warranty, you can trust your marine power to Magnum. The MS Series inverter/charger from Magnum Energy are pure sine wave inverters designed specifically for the most demanding mobile and off grid applications.
Pure sine wave AC output
Reliable
3 stage charger with equalization and battery saver modes
Battery temp compensation
Optional remote panel
Remote panel is necessary for some set up options and to display error msgs
Chassis ground connection size and location could be better
Heavy
Large DC power draw requires large AWG cables
Jeff is a stand-up guy,
says Laurie.
He goes above and beyond, and he’s not trying to manufacture work for himself.
-Laurie
Q:
My 33 foot Chris Craft has dual inboard gasoline engines with stock 55-amp alternators on each. What is your advice on getting a better charge rate from the alternators? 
-Bob