Join Date: May 2008
Location: San Diego, CA
Bikes: '72 Schwinn Sports Tourer, '73 Schwinn Super Sport, '79 Schwinn Twinn Sport 10sp tandem
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Newmtnbkr, sounds like that VisForVoltage guy had a capacitor fail in a shorted condition, and blow a fuse (or more), leaving him with a totally dead charger. Mine still is alive, and for all I know may be working correcttly. I just don't know what "correctly" looks like on the LEDs. Haven't found hide nor hair of an instruction sheet for this beast yet.
I have a Fluke DMM and a WattsUp meter, haven't installed the WattsUp yet.
I plugged in the charger to the battery and into 110VAC, and it began the same behavior as described above. This was after it pushed my ebike (48V 1000W) for maybe ten minutes up and down the neighborhood, so I expected the charge to be a little depleted.
I left it for an hour, then came back. The LED that had always been red before, was still red. The one that had cycled between yellow and green, was yellow. Don't know if it was about to change back to green or not. I measured the voltage where the charger connected to the BMS, and got 60.2 VDC.
Then unplugged the charger from the wall, and disconnected it from the battery (BMS). Then measured the voltage at the BMS terminals again, and now it said 57.8 VDC (no current flowing now, or so I assume).
Does this seem fairly reasonable for a battery which just got charged up to the "full" point?
I hope to install the WattsUp meter on the handlebars in the next few days. Don't especially like the idea of running the high-amp wires (I have some 12ga wire) from the battery/BMS on the back rack, all the way up to the handlebars, then all the way back to the controller just behind the seat. But what's a mother to do. I want to be able to monitor amperage, voltage, amp-hours used, etc. as I ride, and that's the only way I can think to do it, unless I start fiddling with battery and/or controller placement.
Sound like a plan?