Join Date: Dec 2013
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Re: Magnum 2000 charger/inverter install
You don't *need* a combined unit but they are convenient, with automatic charging upon connection to an AC source, simpler wiring, integrated battery monitoring, etc. The troubleshooting advantage of having separate devices is true in theory but my experience in practice is that an inverter/charger is one of the most reliable devices you can put on a boat. Hell, I just pulled a perfectly good Heart Interface Freedom 2000 inverter/charger out after 20 years of yeoman service. The only reason I upgraded was for true sine power for some electronics I have that don't like the modified waveform, an AGM charging program, and the ability to use a small generator to augment inversion from the batteries if I choose.
If you're going to pay ~$2K to install a simple inverter and battery monitor to complement your existing charger, I'd argue that it's worth putting the extra ~$1K in to do it with an integrated inverter/charger. If your existing charger is nice, maybe you can sell it to defray the incremental cost of the inverter/charger. If your existing charger isn't worth anything on the used market, I'd argue you're probably gonna get a better charger going integrated.