Join Date: Sep 2008
Location: Victoria B.C. Canada
Thanked 105 Times in 96 Posts
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I don't doubt that Iota makes a good charger, as does Powermax. But they do not have settings for gel, both according to their manual and btrayfors who is a marine electrician and owns 2 Iotas. His post was the one I linked to above.
Gel batteries need a lower bulk/absorption voltage and a higher float voltage than either flooded or agm batteries, as shown below from a Xantrex manual. I certainly wouldn't risk the life of expensive gel batteries to save a few dollars on a charger. Best to buy a marine rated 3 stage charger with a gel setting.
Or buy batteries to suit the charger.
Living aboard in Victoria Harbour