I'm buying new batteries. The charger is original to the boat 1993-18 foot. So I was looking at replacing the charger with a new one. I understand the new chargers are more efficient and monitor each battery. Duffy wants $650 for a new one, wow! Doers anyone have a better approach?
The charger in my 2017 Snug Harbor does not monitor individual batteries. I just did some quick price checks on reputable 48-volt chargers, and the price you mentioned does not seem all that unreasonable. Hopefully, theirs would come with some support if you needed it.
Let us know how things go, and thanks for posting.