Update: recently purchased this -> DC 10-55V MAX 60A PWM Motor Speed Controller and it literally blew up (pop) in short order, just like prior (above). Using 50V DC input off 4-in-series connected solar batts running only at 10% of 'output' suspect, read somewhere, reason overheated is -> PWM circuit goes into overrun, can't keep up?

If I try lower DC input, 12 or (24 or 36)? perhaps will last longer?

Am trying something different, still in 'experiment mode', want pure H2 and O separation without investing in a new, double gasketed dry cell with separate outports? What am doing is taking TWO 21 plate dry cells, removed ALL gaskets reassembling via center hole (of 3) using SS washers instead then, completely flooding both placed side by side (now 'wet') with one now 'neg' and other 'pos' .. with a gas/electro divider in between except at very bottom, below 'gassing' level.

Still working out container details but def smells of HH production (lol the O cannot detect)

Will Keep Posted!