We are delighted you have found your way to the best Jet Boaters Forum on the internet! Please consider Signing Up so that you can enjoy all the features and offers on the forum. We have members with boats from all the major manufacturers including Yamaha, Seadoo, Scarab and Chaparral. We don't email you SPAM, and the site is totally non-commercial. So what's to lose? IT IS FREE!
Membership allows you to ask questions (no matter how mundane), meet up with other jet boaters, see full images (not just thumbnails), browse the member map and qualifies you for members only discounts offered by vendors who run specials for our members only! (It also gets rid of this banner!)
It will charge them all if you have them in parallel, but that's generally not a good idea as the charger will sense when one battery is full and shut off charging and leaving the second battery a bit low all the time. If you have multiple batteries, you should always use a multi-bank charger to ensure they all get charged up properly.
So if you did that with a multi bank charger, would you need to disconnect the batteries from each other first, like through a switch? I was thinking of installing 2 new batteries for new stereo with a circuit breaker, then switch on each one, then into the power bussbar. From the bussbar out to the fuse block and to the backup parallel switch on the main power (to provide backup if starer battery dies for some reason) and the new stereo devices...
No, the charger has leads going to all of the batteries and they're each charged independent of the others. That way each one can get a full charge. The positive leads of the charger are on separate batteries, so each battery gets its own charge and it doesn't affect the other - no need for switches or swapping wires.
Not sure how yours is wired, but if the boat came with dual batteries, you likely don't need to do all that. Just replace the batteries and let the system take care of them. If the house battery gets low from cranking tunes all day and the ride back to the dock is short, the charging system won't get it back to full. That's why we use chargers at home/dock/storage.
The stators actually put out decent amperage and can easily charge the start battery, then switches to the house. But unlike a car, returning to the dock just isn't long enough to get a good charge into the house battery if it's low. If the house is at 50% it'll take hours to charge back to full. It's not like your car where you only start it up and then recharge the battery back to full in 5 mins. All day tunes with an amp will suck a lot of juice out of the house battery, just like if you parked your car and ran the stereo all day, the car probably won't start at the end of the day so you need a boost. Same thing applies to the house battery if used all day.
I don't understand this part....if you have the batteries hooked up in parallel, isn't putting a charger on one just like putting it on all of them?
Yes that's right. But if you have dual batteries and a dual battery switch, then they are not in parallel. One battery is wired to the house, and the other is wired to the engine starter motors, and they can be charged independently.
Thanks. I was planning on leaving the start/existing house since they're older stock batteries, and add 2 new batteries for the stereo. If I put a switch on each and throw a dual bank charger on it, that should be good. When the current house dies, I'll re-wire to use the 2 new ones for current house as well and as backup starter.
How many batteries do you have with your amp/speakers that lasts 5-6 hours? Just 1? How low does it get in that amount of time?
I've ordered the same one but 12 amp dual bank as I don't need high current. I considered the NOCO brand, but once I found out the ProMariners can push all 12 amps to the house battery after the start is full, sold me on it.
You should already have a DVSR switch that isolates the batteries when not charging. There are a few ways you can set it up to disconnect them when you are charging with shore power.
Thanks that's a good link. Pretty easy mod to move the DVSR to the switched side of the house switch to disconnect them when the house is off. I think with that and my other switches I should be able to accommodate my setup