Ed Waldrep
1 µW
- Joined
- Apr 4, 2018
- Messages
- 3
I've been running a 1000watt E-Bay hub motor on a 48 volt controller, the KT48ZWSRLT-LCD, for a while now with HobbyKing Lipo batteries on a 100. I started with 12s on the first run, laughing the whole time at how the batteries normally propelling an RC EDF jet were now pushing me around. I didn't get much range, about 3 miles, before the 40 volt low voltage cutoff killed the power. I know through research that I started late last summer that 13S is one of the normal ranges of cell counts with ebikes and the li-ion batteries. I had a box full of 4S 5000 mah packs my friend gave me when he moved, so I was sort of set to use RC Lipos, vs buying new batteries. I have a plethora of chargers also, some will charge 6s max and some 9s max. I tried 13S using a 4 x 4 x 5 one day and that was better. I decided to give 16S a try, fearing I might fry the controller, but it worked fine, only one time I've had the LCD give some error message, but upon rebooting it worked fine and the motor ran. The low capacity of the packs and their age means I'm pushing the limits every time I ride more than a few miles. I've used voltage monitors with audible alarms that go off at 3 volts per cell early on but didn't have enough for every pack. I marked the packs, and what cells were low on capacity but it's no fullproof, no alarm on some packs means I've puffed a few cells, and the other day an entire pack!
I'd really like a controller that would let me set the low voltage cutoff to my desired level, vs being stuck at 40 volts, which at 16S is well below 3 volts per cell. I'd like to mod my present controller, the KT48ZWSRLT-LCD, but have found very little info on it, a few mentions of it here and there but no detailed info about possible jumper mods or anything like that (I can do soldering and repair my packs, change connectors but electronics are a bit beyond me...I knew I should have told the air force recruiter "avionics"...oh well).
I thinking a new controller would be my only or best option, I saw one that's bluetooth, though I have a windows 10 phone so probably no app for the controller. I could just run 12S with the new 16000mah Multistar packs I have on order, that'd keep my cutoff at 3.33 volts per cell so I'd be very unlikely to damage them, but that limits the capacity I can get out of them.
Any recomendations? I've read a lot in the past, I get on a kick and have 20 browser tabs opening and reading but seem to come up short on info on this controller. If it was an RC controller I'd probably have a programming cable to hook to the PC to change things but they don't have hall sensors in them.
I'd really like a controller that would let me set the low voltage cutoff to my desired level, vs being stuck at 40 volts, which at 16S is well below 3 volts per cell. I'd like to mod my present controller, the KT48ZWSRLT-LCD, but have found very little info on it, a few mentions of it here and there but no detailed info about possible jumper mods or anything like that (I can do soldering and repair my packs, change connectors but electronics are a bit beyond me...I knew I should have told the air force recruiter "avionics"...oh well).
I thinking a new controller would be my only or best option, I saw one that's bluetooth, though I have a windows 10 phone so probably no app for the controller. I could just run 12S with the new 16000mah Multistar packs I have on order, that'd keep my cutoff at 3.33 volts per cell so I'd be very unlikely to damage them, but that limits the capacity I can get out of them.
Any recomendations? I've read a lot in the past, I get on a kick and have 20 browser tabs opening and reading but seem to come up short on info on this controller. If it was an RC controller I'd probably have a programming cable to hook to the PC to change things but they don't have hall sensors in them.