Another vote for ProMariner. The 1st project on Northern Lights during the 1st month we owned her was replacing the old ferrocent (sp) charger. I went with a ProMariner 1260 c3, I haven't a single complaint, the 2 8D batteries hardly use any water, less than a quart per year total for both. The 8d start and the generator battery are the same ones that were in it when we bought the boat in 2010. The 8D house battery was replaced in 2012. The original was working fine for a old style charger, I wanted a newer 3 stage with the option to equalize.