Join Date: Jan 2003
Location: Maine Coast
Thanked 287 Times in 220 Posts
Rep Power: 17
You may want to run a Balmar Duo Charger between the house wets and the AGM as this will provide proper output charging voltages & profiles for the AGM and the wets.
You will probably want an external regulator when you go full AGM. The reason is not so much voltages as the massive acceptance capabilities of AGM's. AGM's tend to cook alts by running them flat out for way to long. With a good Balmar you can turn down the output to about 15-20% less than the rating on the alt, this and temperature compensation will help it last longer.
You'll also want temperature compensation for the alt and the batteries.
A solar panel on a dodger, where it can be shaded by the boom, can drastically alter the performance of it. Even 10% shading can cut the output by a large amount. If you're cruising you may want to consider davits then mount the panel there to get the most out of it.
As John said more information about the current alternator and belt sizes would be helpful.
-Maine Sail / CS-36T
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