Dc to D.C. Alt charger for audio battery

[shift95]

Has anyone used one of these promariner digital mobile chargers ( battery to battery ). I would like to isolate my group 31 Audio batteries and still be able to charge them when the boat is running ... I have a 2017 Scarba 195hoi thank you guys for your input !

 

[Ilmmct]

Yamaha owner, but curious if you have a dual battery setup; one battery/switch for Start, a second battery/switch for House (audio, lights) and a third switch for Parallel (emergency joining both batteries for dual power). There may be benefits of a dual battery setup (in your Scarab already) or by pursuing this as an aftermarket mod. Audio isolation and redundancy (parallel mode). I have a dual battery maintainer that I use when I get back to shore power.

 

[David Analog]

There are several common methods for selective isolation and charging of dual battery banks. 1) a manual switch. 2) diode isolation as used by many outboard motors with dual charging outputs. 3) a voltage sensing solenoid.
Most boaters accomplish dual bank charging needs with a dual bank shore charger plus a VSR/ACR (option #3).
The Promariner charger appears to be combining routine functions in a single chassis without addressing anything new.