Re: Marine Battery Charger
The size battery you need depends on the number of accessories the battery must power and the current draw of each. If this is a starting battery, a group size 24 or 27 will be fine. If this will be a trolling motor or "house" battery then you need a deep cycle and the largest capacity (group 27 or larger) you have room for and money for is what you need. You cannot go too large when selecting batteries -- but you can go too small. As for chargers, most marine chargers these days are smart chargers and can be left turned on indefinitely and are intended for permanent installation in the boat. If you have just one battery, you need a single output charger in the 6 - 10 amp range. If you have two batteries you need a dual output charger with 6 - 10 amps per output.
