Battery not charging
We bought our 1994 Duffy Snug Harbor in March, and it worked great for a month, we used it every weekend. We didn’t use it for 2 weeks and five of the six batteries “died”. We were told all 6 batteries were brand new when we purchased in it. The boat was plugged in for the 2 weeks, and we believe none of the switches for the radio, lights, etc. were turned on during that time.
We replaced all five batteries and are still having issues. On the NOCO Genius charger, banks 1 and 3 work like normal, but for some reason bank 2 will not work and when you push the button, the “High Voltage“ light comes on. All batteries are 6 volts and are connected in a series.
We purchased a brand new NOCO Genius charger to see if that was the issues and it did the same exact thing. We decided to return the new charger because it was not the cause of the problem.
We also tried replacing the motor controller and that didn't fix the issue either.
Does anyone have any ideas on what could be causing the “High Voltage” light to come on?
Can you tell us the model of the NOCO Charger you are using? Lead acid batteries need to be kept charged to be kept alive, and it seems that the NOCO charger just didn’t keep the batteries charged. I assume you have a 36V system (6 x 6V batteries connected in series), correct? When you say banks 1,2, and 3, are you charging 2 6V batteries at a time?
I think you’d be way ahead by buying a suitable 36V charger to charge the entire battery pack at the same time. Delta Q is the brand used on many Duffy boats, and if you do a Google search “Delta Q 36V charger”, you’ll get several links to an appropriate unit.
Also, if you only replaced 5 dead batteries, you should replace the 6th battery with a new one. The pack works best when all of the batteries are of the same brand, model, and approximate age and condition.
Good luck, and let us know what you end up doing.
@robhouston The NOCO charger is NOCO Genius GENPRO10X3, 3-Bank, 30-Amp (10-Amp Per Bank) Fully-Automatic Smart Marine Charger, 12V Onboard Battery Charger, Battery Maintainer and Battery Desulfator with Temperature Compensation.
Yes, 36V system (6 batteriers, each 6V in series). Yes, to my each bank is charging 2 batteries. I've seen something about that Delta Q, but haven't looked into it. Thank you for your help.