First off, go to your battery manufacturer's web site and look up what THEY say charging voltages & current should be. Second, get a Triminic battery monitor with shunt and install it to see what kind of voltage your converter is putting into your batteries AT THE BATTERIES. The big issue with converters is that they are designed to not overcharge anything, and that means they usually don't put out enough voltage to really charge in the first place. While I like Progressive, I wouldn't just go by what some sales rep says for any product of any company.
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