Jamesshoop1

Well I don’t want to jinx it by saying it’s fixed, but I added a second 100ah battery and I haven’t had any problems this week. The voltage is much steadier note I don’t get big drops going uphill. Still, I don’t think it was a bms issue, as I was always getting power past the solenoid

Well, it started doing it again today with the voltage at 52ish so I guess I can rule that over voltage protection out. i did notice, while it was driving good this morning, I took it out on the road and opened it up in high gear and got a massive voltage drop on the litime display down to 46v which seems unhealthy for a lithium ion battery. It killed power to the motor right after that and now it’s back in the loop of killing drive every 5 seconds regardless of power draw. i went ahead and ordered another battery, that will bring me up to 200ah

Well, now it’s not doing it. I left the dash on and let the battery go down to 52.3 volts down from like 53.9 last night. Maybe it is a high voltage shutoff? Does anyone know what max voltage the sevcon will accept?

Yeah the output really varies when it kills, it can be at a crawl pulling just a few amps or open throttle still kills exactly 5 seconds. Also, I put a multimeter on the sevcon side of the solenoid, and after the motor kills I’m still getting 52v going into the sevcon so I really don’t think it’s battery related. and no, no errors on the battery monitor anyway, I’m bringing it in to the dealer tomorrow morning, I’ll report back

This one: https://a.co/d/fabHdcb i realized its undersized on ah, but it doesn’t make sense that it would kill drive with the back wheels jacked up pulling very low amps

I never get an error, indicator light on sevcon stays solid green as well. Today I cleaned all electrical connections and put in new main battery cables. I’m about to give up and take it in to the dealer. i only have one battery, its voltage it 53 right now. Maybe it’s too high for a controller programmed for lead acid? I’m going to let the charge drop way down and see

Well that didn’t work. New 12 volt and it still cuts power every 5 seconds on cue. Checked the brake switch, solenoid, charger interlock, speed controller… stumped 🤔

I had tested the 12 volt battery with a multimeter and it was fine, 13.8 volts. However when I load tested it it dropped to 9, and when I removed the battery it was reading 6 volts. So I’m pretty sure this was the issue. I have a lifepo 12 volt on the way I’ll report back if that fixes it

This was happening to me regularly with the original battery pack, I would drive a few yards and power cut to the motor, no error code, dash works, lights etc, just no drive. Brake lights not on so I don’t think it’s a switch thing. Sometimes it would go back to normal after a few day sitting in the barn. I ended up changing to lithium ion battery 100amp 48v and the problem completely went away for two months so I figured it was something worth the old battteries. Now it’s doing the same thing again, I’ve removed every main electrical connection, cleaned it good, and put it back together. Battery is at100 percent and good voltage. What is interesting is it doesn’t matter how much power I’m drawing, if I’m just creeping along in low or flooring it in high it stops after the same amount of time, about 7 seconds. If I let go of the acceleration right before the 7 seconds I can keep driving like that indefinitely but obviously that’s pretty annoying. Or if I switch immediately to reverse I can back up and go back to F without cycling the key. Has anyone else run into this? It really seems like a safety switch issue to me but unsure what else to check.