“Hi! Hope you can help me. I bought a 1000W 48v front hub motor for my DIY E-bike project and have four 12v 18Ah UB12180 SLA Batts wired in series to make 48v/18Ah pack. My question is: Could there be any damage to the motor if it can only draw 880 watts at peak? (I live in a city with lots of hills and weigh about 240 lbs and plan on using just the motor most of the time, minimal pedalling).
Also, the charger that came with the motor kit (it says it is for lead-acid batts) has ‘48v/20Ah’ on the box it came in, ‘2.5-3.0A Output’ on the bottom of the chrgr and ‘6v-250A’ on the plug going to batteries. ??? A little confusing ya think?
Anyway, assuming the charger is safe for my config, will it charge all 4 Batts simultaneously if wired to the same terminals that feed to the controller? Or do I have to charge each batt separately? And will current also go to controller? I assume (hope) the controller (which says is 48v 26A max on it) has one way diode or something to protect itself but could I fry the controller? (I also put in a 20A in-line fuse on the hot wire). This is my first e-bike build, so appreciate your comments and taking the time. I haven’t hooked up everything just yet, I’m really looking forward to testing it out, but just wanted to make sure I’m doing it properly. You have a great website here with so much knowledge, thanks again,