I recently built an electric wagon. I started out with 10AH batteries (2 - 12V batteries) and that proved to be too limited a running time so I upped the batteries to 35AH (2 - 12V batteries). Everything runs great, but I think I have run into a problem.
I have a 2A charger, which obviously is going to take a long time to charge these batteries. When I plugged the charger into the new (and should be charged) batteries, it lit green but when I then plugged the connected charger into the wall, it lit red and stay that way for 5 hours before I pulled the plug. I am using the SPD-24500B controller. First question, any thoughts on why the recharger never lit green? The batteries are new and I only have about 20 minutes of use on the batteries.
Second question, I am considering getting a better charger (7A) but I am concerned that the SPD-24500B controller might not handle the current output from the charger - will this be an issue? Third question, if this is an issue, can I just alligator clip the charger to the batteries and bypass the controller to charge the batteries?
Last and unrelated question, my throttle (THR-73) has a green connector for the battery meter. What connector do I attach this to on the SPD-24500B controller?
New batteries typically have not been charged since they left the factory and will take a while to charge for the first time. I would expect that the battery charger light will turn to green if it is left charging the battery pack for a longer period of time. It is recommended by most battery manufacturers to charge new batteries for 10-12 hours with a standard size battery charger, so with a battery charger that has 60% less output than standard I would charge the batteries for 24-30 hours for the first charge. During the initial charge of the battery pack the charger should be left on the battery pack after its light turns green to trickle charge the new batteries to condition them for the first time.
The SPD-24500B controller is rated for battery chargers up to 3 Amps. The wires between the controller and its battery charger port plug are not heavy enough to put more than 3 Amps through. When using a charger over 3 Amps the charger port should be wired directly to the battery pack.
You could use alligator clips to recharge the batteries however I do not recommend alligator clips due to the possibility of accidentally connecting the battery charger in reverse polarity to the battery pack and damaging the charger. I highly recommend using a charger port which is permanently wired to the battery pack to avoid making any battery charger to battery pack connection mistakes.
The green battery meter wire of the THR-73 throttle should be connected to the red wire of the SPD-24500B controller's Power Light connector.
Please let us know if we missed any of your questions, or if you have any further questions.
Thank you for the prompt answers! This has been a fun project. I just wish the 35AH batteries were not so heavy!
batteries charged battery indicator reads dead. Less that a month old.
These tests will tell you a lot about the condition of these parts. If the battery pack Voltage tests low then I would individually test each battery in the pack to see if one of them has a low Voltage compared to the others. Then I would load test the individual batteries to see if one of them is defective.
I would start with these tests. If the problem is still not solved after performing these tests then please let me know and we will take it from there. Please let me know if you have any questions.
That help`s but it run`s like it is fully charged , yes I did get a voltage meter that read 20 22 . haven`t ran it for at least a week, but I will check everything U said, and that I Thank U very much for getting back with. me.
THANK YOU,THANK YOU, THANK YOU, It was a loose wire, in tight now, your are the best. and I'm going back outside to ride, thank you again your the best.
P.S. It`s still fully charged, seeeeyaaaaaaaaaaaa.