powermax output stopped

[Mobilesport]

I just started charging with my Honda 2000 genset and a 75 amp Powermax 
battery charger when I noticed the generator running abnormally loud and as I'm looking at the ampmeter I noticed the amps dropped to zero and the generator quieted down , I thought man I just blew the output out of my charger , later I tore it apart and noticed a component  ( I think it's a capacitor of some sort)
with one of its legs opened circuit like it burnt open , see picture
Anyhow I soldered wires on its legs and it restored the output.
I thought it was strange that it didn't  blow either of the 40 amp fuses and also a glass
fuse located inside was not blown either.
If it ever revs up like that again I think I'll turn the voltage  down a little  for awhile.
Note that I've been using this charger for a couple of months with no problems and the only 
thing that changed recently was a new set of Sam's Club gc2 batteries

 

[SternWake]

I think that is a MOV

Metal Oxide Varistor

https://en.wikipedia.org/wiki/Varistor

But it could also be the inrush thermistor.

https://en.wikipedia.org/wiki/Inrush_current_limiter

Did you plug it in and out and in again quickly?

Is it near where the 115Vac enters?

That thing got REALLY hot.

Good job on the resoldering.

Sometimes these Components can be upgraded to something beefier.
Which components with what replacements would be way Outside my pay grade

 

[blars]

The RT-1 label and symptoms point to it being a thermistor. It may have had a poor solder joint vibrated partly open, then the high power needs caused it to heat up and fail. Modern Lead-free solder is trickier to use properly, us old timers purchased lifetime supplies of 60-40 or 63-37.

 

[Mobilesport]

I think that is a MOV

Metal Oxide Varistor

https://en.wikipedia.org/wiki/Varistor

But it could also be the inrush thermistor.

https://en.wikipedia.org/wiki/Inrush_current_limiter

Did you plug it in and out and in again quickly?

Is it near where the 115Vac enters?

That thing got REALLY hot.

Good job on the resoldering.

Sometimes these Components can be upgraded to something beefier.
Which components with what replacements would be way Outside my pay grade

I didn't plug it in and out and in again quickly that I remember but it's not uncommon for me to
get things going quickly , I've just recently slowed down a little and let my generator warm up
while starting up.
I was unaware that I was supposed to let it warm up.

It's about 4---to---5 inches away from 115 Vac