Last sunday, I finally took some time to solder the PWM kit I got few weeks ago
A little test with a 12V AGM battery and a small motor
It worked !
But when I tested it instead of the capacitor and resistor on the Tyco Kilovac EV200A1ANA, then I got smoke and blew the 2A fuse on the 24V line ... after hearing the contactor having difficulties to close properly with its usual big clap. There must have been too much consumption from the coil to close I guess and the MOSFET was burning hot !
So I kept the resistor & capacitor Economizer solution for the Kilovac, tested for sevral weeks now, and used this PWM kit for the fan speed control on the metal cabinet, manual control that is for now
After long tests with the fan at different speeds, nothing was over heating, and it seemed like a good match
So I plugged it on 24V line of the ESS to further test it with the voltage it will get when mounted in line on the switched 24V
24V taken at the source, right after the 2A fuse