I have 3 batteries in my boat with separate circuits but negative terminals connected.. Can I leave them in place when charging with this charger?
1815083
Yes you can, you have a common ground configuration just like my truck. Having the negative terminals tied together is common, and it will work fine.
1815084
To keep from shorting out the circuit I would disconnect the negative grounds just to make sure. These are also very low voltage; the bigger the battery the longer it will take to bring the batteries up to full charge.
1815085
See answer #14: http://www.batterytender.com/Frequently-Asked-Questions/#answer14
521581
Yes, it does, check out the website and read all the specifications on this unit. Don't leave the boat connected to the battery bank while charging, over-amperage conditions might present themselves, disconnect the negative cables which bond the batteries and the boat together. If in salt water, make sure your zincs are in good shape.
472743
I think "directly" is not recommended, but I cut some stainless tubing into 1/2" spacers and routed my mounting screws thu them. This allowed air circulation around the unit. Be sure and check the performance of your batteries regularly. If one starts to die, your charger will destroy the other and itself.
206822
I have two of the mentioned chargers. I can't answer your question since I keep my chargers plugged in to 110V when boat is not being used. I have owned for a couple of years and am very satisfied with product? These are solid state chargers and should not drain batteries unless there is a problem with chargers or possibly wiring connections.
697401
My batteries are on both sides of my boat and I had plenty of leads left, I mounted my charger in the middle of my boat. Bob
639416
I have two of the boats, so I have two chargers. The charging of the batteries is a bit clunky. Sometimes I will take what I think is a fully charged battery and as soon as it hits the water the remote starts beeping indicating a low battery. The boat runs fast and for a long time, so I'm pretty sure the low battery signal is flawed. Other times, the battery is fully charged and only lasts a short time. Sorry, that is no help, but your charger may be working fine and the boat/remote are acting weird...Happy boating.
2003207
if your charger is 48 volt rated then connect to the two leads that leave the battery bank. the one that leaves the last positive terminal is the red connection the3 one that leaves the last negative terminal on the battery bank is the black connection. if it is a 12 volt charger then you have to charge each battery separately
768376
Hi Shard, my initial assumption is that you do not have the connectors in the right place. The batteries are connected in series i.e. mine are 6volt batteries and I have 6 of them for a total of 36v. So the positive connectorhas to be on the 1st batteries positive terminal and the negative connector has to be on the negative terminal of the last battery. If you have it hooked up that way, one of the batteries might be bad. Bill
1550112
I would think so Alan, but maybe ought to call Battery Tender. I leave my two boats plugged in for months at a time, and when I'm ready...they're ready...at least the batteries are!
1680646
Yes. But make sure you connect the batteries in parallel; i.e. connect the two positive terminals of the batteries together, then connect the two negative terminals. Finally, connect the positive terminal of the batteryminder to the positive side of the two batteries and negative terminal of the batteryminder to the negative side of the two batteries. I recommend disconnecting the batteries from the camper before charging to make sure no circuit in the camper will draw any current from the the batteryminder. The manual, which you can get on-line, states you may charge deep cycle batteries. If you charge two batteries at a time, they should be of same type and of comparable condition.
768380
Hi Shard, my initial assumption is that you do not have the connectors in the right place. The batteries are connected in series i.e. mine are 6volt batteries and I have 6 of them for a total of 36v. So the positive connector has to be on the 1st batteries positive terminal and the negative connector has to be on the negative terminal of the last battery. If you have it hooked up that way, one of the batteries might be bad. Bill
2271424
I would NOT recommend that you do this.. It can probably be done but this charger monitors a battery for the level of discharge as well as the level of charge. If it were the exact same battery with the exact level of discharge maybe but I don't see that happening.. I would NOT recommend you do this..
1567075
You can leave the batteries on the charger to no detriment.I've left mine on for days, even. Do disconnect them if it stays in "charging" for entirely too long (I'd say over 24 hours) as that might blow your batteries up. I've never seen this though.
1508344
Yes, I have mine attached to my battery in my boat 24/7 (at least in the summer) and use the boat at the same time. Don't expect this charger to come anywhere close to charging your battery while using the trolling motor tho. Connect it and forget it.
2149457
Yep, you should be able to hook them up to two 12 volt batteries permanently as the wires are set that way. I didn't have room to mount the charger in the boat so I bought some battery clamps for the end of the wires that hook to the batteries and charge them that way. When the batteries are fully charged, I pull the clamps, unplug the charger, and store the charger away. I like this better as I can see when the batteries are fully charged and not have the charger continuing to trickle charge the battery. Although, they say that is ok. So far, this charge works great!!
1936949
I don't believe it will hurt the batteries, but in general with Li-ion batteries it is a good idea to remove them after they are charged. They will hold their charge for months after being re-charged, so why would you want them left in the charger? It is always safer to remove the batteries and unplug the charger.
1086110
Hook the positive to the positive of the first battery, and the negative to the negative of the last (6th) battery. These terminals will have the supply voltage to the motor. When hooking these up, be sure the cap is on the end of the battery charger lead. Last week, I disconnected the charger and inadvertently dropped the end, without the cover onto one of the batteries in the middle of the cart. BIG SPARK!