US battery/ onboard charger

[TowboatTroller]

Had some batteries recommended to me from Mo and BRM "US brand batteries" doing the specs on batteries the two I'm looking at are.

Us185 E @25amps 355 minutes
L 15 5/8 W 7 1/16 H 14 7/8
105lbs. $210.93 + $30 core charge
$6 shipping to buisness

Us 12v xc2 @25 amps 292
L 13 1/8 W 7 1/16 H 11 3/8
86lbs. $153.00 $20 core charge
$6 shipping to businesses in truck route.

These big batteries will take a lot of charge I'm sure. I have an onboard charger 210d minn kota two bank 5amp per bank. With two batteries staggered 24volt could I hook car charger to pos on one battery negative to other battery on say 10amp 20amp or 40amp charge to charge over night faster? Other words running two chargers at once onboard and car charger? Have done it on previous 12 volt setup with same kinda onboard charger and car charger on different boat but not sure about 24 volt or if it'd hurt batteries?
Eventually gonna buy 3bank 15amp per bank onboard charger but for now can this work?

[TowboatTroller]

Just spoke with guy at pro charger he says could do both chargers at same time just have to do one battery at a time with car charger.

I was confused cause I staggered charger hook ups on camper but there 6 volt batteries so got that explained to.

[TowboatTroller]

What's you guys opinion on these batteries think 106lb to big or the 86lber would be plenty to troll all day? Guess you can't go to big if it'll fit but just not sure which one to get.

[Cray]

On charging you are only going to be putting back in what you took out. If charger is charging batteries you now have it will charge those the same way. I would be Leary of trying to hook up two separate chargers on that 24 volt setup. One crossed wire could create a disaster. I would wire the charger you have and give it a whirl first. Use car charger on cranking if needed. The larger battery is going to give you the longest run time. 25 amps at 355 is the number of minutes it would run a 25 amp load. Amp load from a trolling motor is a question that always gets a sewers from all over the board but you are rarely if ever going to pull that kind of load. If your pulling cranks and can fit the bigger battery that's the way to go.

[TowboatTroller]

The battery says @25 amps 355 minutes is that same as RCA ??

[TowboatTroller]

I don't see an actual RCA number on the lines for these batteries do you?

[CatFan]

I don't see an actual RCA number on the lines for these batteries do you?

RC is in the column on the right that says minutes @ 25 AMPS

The 185E is a big battery. Pushing 16" long and 15" tall. Make sure you have the space. The other battery is a couple of inches taller than a 29 or 31 too.

Biggest problem with those batteries is you are hosed if you have a failure during warranty unless you have a dealer close who keeps replacements in stock.

Charging is going to require a bigger charger IMO. You normally want to charge them with a charger that supplies 10% of the 20 hour AH rating. For the bigger battery, that is 185. That means you'd want to charge that battery at 18.5A. 15A would probably do, but I wouldn't go less.

[BuckeyeKdog]

Dang, them is some High Dollar Batteries

[TowboatTroller]

I thought them was rc numbers just didn't know for sure or if its @25 amps or more. I'm gonna measure when I get home to see what I can hold but I believe quite a bit bigger. If the ever start are 190 would any two batteries 220-250 rc last 6 hours pulling cranks? I know the ever starts I have now which are almost 3 years old don't last long in the wind. Maybe 2half solid hours then there kinda weaker.

They have one year warranty and truck runs every Tuesday guy said they'd swap if needed. There's dealer in town to check them.

[TowboatTroller]

Gonna go with the 86lber @25amps 292
its 13 inches. Two of them should be plenty.