I had a rectifier cook my battery, it really went fat, but didn't burn the PGMIII even at 17 volts.

On the other hand, did a PGMIII on the other bike, burn the RC valve transistors and part of the circuit board, in the PGMIII, with no apparent reason. Everything ran correctly and freely and still does with the new PGM.

In non of the cases did a fuse blow.