Looking for advice on winter projects as Chance , is sitting high and dry for winter Milwaukee Wi. Replacing batteries and 120 volt shore power charger. larger alternator on my atomic 4 engine now has standard 30 amp. Battery bank now is two house hook in parallel , 9 years old . One starter battery 2 year old. A new 120 volt electrical charger size and brands to use ? Looking for galvanic isolator type and brand ? Looking for a bullet shape anode in magnesium or aluminum 1 1/8" stainless shaft fresh water. If I can't find a bullet would use streamline mg or al near hull and keep my zinc bullet on the same stainless shaft 3/8" from the strut ? Bob K