Yeah I got a Minn Kota Precision 3 bank and the documents it came with said it's completely waterproof. Sure looks sealed to me. Minn Kota says you can charge lithium batts with it on the AGM mode.
I'm on a lithium battery board Geoff.
People on there, many that are FAR more electrically savy than myslef, say that it isn't a good idea to use standard chargers for LiFePo4 batteries, even if the battery company claims to be able to do it.
They say to use the charger specifically designed for that BMS in your LiFePo4 battery, whichever it is.
There are tons of reasons they give, but the largest is that they are made to operate together and will lead to the longest life of the battery.
Being that these batteries are major bucks, I will err on the side of caution and use the one recommended and supplied by my bettery supplier.
Even if it isn't waterproof/resistant.
The chargers I bought have cooling fans in them and are no way sealed.
But they will located down in my cuddy and away from any direct water.
Now, I bought a 2nd 8amp charger, for use when I retire down in Florida.
I plan on taking the battery with me winters down there to be used on my pontoon boat.
I will buy a 36VDC Terrova ipilot for it (not an Ulterra).
This will give me double duty on the battery and has helped me to justify the huge cost of it.
Anyway, I will have to figure out a way to isolate the charger from rain and moisture without overheating it.
Unsure yet, but I'll figure it out.
With the salt water I will be in, it will probably be best for me to simply haul it out of my storage shed as needed and simply plug it into things on temporary basises.
The BMS in the battery has the bluetooth option that allows me to use a fee app I downloaded to my smartphone.
This app allows me to monitor the battery level while using it and also while charging.
So I can plug in when it gets down to 20-30%.
But more importantly it allows me to go out and pull it off the battery when it finishes charging and the battery is at 100%.
Cool feature.