Probably a dumb question, but I’m not real bright on electrical.
I have an on board charger for my 24V trolling motor batts that I think is either not working or hooked up wrong as it isn’t charging.
I have a regular batt charger. Can I hurt anything by leaving the TM batteries hooked as is and charging them individually with the manual charger until I get it looked at?
Thanks.
Yes, you will hurt them. They are wired in series so you have 24volts. Your charger regular charger is rated for 12volts and can not isolate the draw of each batter. Disconnect the jumper wire and then you can use your regular to charge the batteries one at a time.
THANKS! will do!
Vinman
“Every saint has a past, every sinner a future”
www.summervillesaltwateranglers.com
2011 Carolina Skiff 178DLV
90 HP Honda
It’s still not good for them but it will work in a pinch. Deep cycle batteries are designed to be charged slowly. Your on board charger prolly charges at 5 or 10 amps… Your regular charger most likely has a lot more out put. I just installed a 3 bank Dual Pro charger on my boat. Check into Dual Pro if u need a replacement best bang for your $$$ in my opinion because they last.
2007 Scout 221 150 Yamaha 4 stroke
Thank you
Vinman
“Every saint has a past, every sinner a future”
www.summervillesaltwateranglers.com
2011 Carolina Skiff 178DLV
90 HP Honda
Vin, I know this is probably a “duh” suggestion, but did you check the in-line fuses on the postive leads from the charger? If not, your solution may be that simple. Check both of them. Also, check the terminals. They can get really hot sometimes (especially if you test your motor while it’s batteries are low and charging). I’ve had to re-solder mine before. Finally, check the cells in both batteries and make sure they are full of water. One low cell can potentially pull both batteries down. I Just a thought to try and help, if possible. I fish in spurts–fish hard for a few months, and then don’t fish at all for months while the boat lays up unattended, and then I alternate back to fishing hard for a while, and so on–so I’m always running into stuff like this.
Gotcha Covered,
Lee Strickland
Strickland Marine Insurance Agency, Inc.
https://stricklandmarine.net
843-795-1000 / 800-446-1862
You can use your portable 12V charger and leave the batteries connected. Your on board charger does not output 24V. It has two 12V (pos and neg)outputs; one for each battery. A 36V charger would have 3 outputs.
To use your 12V portable, decide which battery you want to charge first and attach the positive and negative to the respective post on the battery. The watchout is to make sure the leads from the charger are connected to only one battery. If you have the positive lead attached to battery #1 and the negative lead to battery #2, then you can have a problem.
Iain Pelto
Sea Hunt Triton 160 w/ 90 ETEC “JB3”
Native Manta Ray 14
Yes you can. As hairball said, just charge one battery at a time. You dont even have to disconnect anything. Just make sure you charge both batteries. It is only bad if you have one charged battery and one discharged battery. By doing this, you are doing exactly what your onboard charger is doing, only a more inconvenient way. Slow charges are always better. Your 24v circuit is only complete when it is in use, and power is flowing!!
Key West 225cc Yamaha 225
*Unless you are useing mutli cell lipo batteries… which I am sure you are not.
Key West 225cc Yamaha 225
another solution is to buy a 24v charger/tender. that way you do not have to disconnect batteries. just put the positive on one battery and neg on the other. always will want to charge at the 2-5 amp rate. i just bought one for my boat and am happy. we also sell them at the shop.
Thanks for your generous and thoughtful answers. Thats what I love about this site. Problem solved. Actually found a wire misplaced that kept it from charging right in the first place. I believe we are back in business.
Thanks again, peeps!
Vinman
“Every saint has a past, every sinner a future”
www.summervillesaltwateranglers.com
2011 Carolina Skiff 178DLV
90 HP Honda