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Re: Smart Battery Isolator/combiner [message #328330 is a reply to message #328312] Wed, 17 January 2018 08:45 Go to previous messageGo to previous message
Matt Colie is currently offline  Matt Colie   United States
Messages: 8547
Registered: March 2007
Location: S.E. Michigan
Karma:
Senior Member
Please be cautious with "Smart Combiners".

As many of you know, I was part of a boat electrics service group for many years. (This is where the coach was most used for 6 years.) While I like and have installed and replaced combiners as well as isolators, the combiners that are not rated at starting current (~400A for a 455) are easily damaged if left engaged when cranking. This can happen any time the demand combine capability is used even if the main engine battery is at a capable state of charge.

When a combiner fails, they often indicate that they are functioning properly, but in actual fact are not. The indicators are that it has engaged and there is any differential across the two main posts, it is toast. Repair is somewhere between impractical and impossible. Carry the KenB 1$ combiner in your kit just in case.

Matt

Matt & Mary Colie - Chaumière -'73 Glacier 23 - Members GMCMI, GMCGL, GMCES
Electronically Controlled Quiet Engine Cooling Fan with OE Rear Drum Brakes with Applied Control Arms
SE Michigan - Near DTW - Twixt A2 and Detroit

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