My wattmeter, that's connected between my battery and controller via a shunt, stopped working a while back. I checked the connections, and things appear to be OK. The voltage reading still works, but amps, watts, and watthours just read zero (actually the watthours increments tiny amounts after a long ride). Thinking back, it failed around the same time that I had starting using regen, but not sure if that's coincidental. Is it possible to damage the current circuitry when the current is reversed during regen? I'm guessing no, since it seems like the measurements on either side of the shunt is really just a small voltage going the meter, albeit with the reverse polarity (which I guess could have caused damage).