Charger Sizing... (too big?)
I've been digging through the tons of great info on the subject of chargers and find a lot advise about installing too large or too small of a charger. 'Size it to fit your bank(s) and use requirements.' (10% rule) The issue I have is that the new(old) boat has an ancient ProMariner charger that I'd like to upgrade to a modern multi-stage charger (ASAP). However, within the year I will also increase the size of the house bank. Currently have a group 24 starter battery and 4 golf carts (200Ah) on the house side. Longer term plans include upgrading to 400+ on the house side (possible AGM) as well as solar and wind-gen. But while the big refit is underway, she'll be on a dock with shore power. Will the modern multi-stage chargers like the ProNautic 1250P (50A) toast the current battery bank? Do I need to overhaul the battery bank and the charger at the same time?
Thanks for any and all input.