Yup, I went through a few sets of Fuses. It was not stressed in use as it was intended to run a backup single phase Pump, since I believe Water is Important, and in a blackout I wouldn't have power to my Primary 3 Phase pump. Also had a 300W Dimer circuit to LED house lighting. I did push it up to 48Amps in to test it a few times. I think the rev EMF voltage from the Inductive ( Transformer) load may have taken out the FETs. Strange if they didn't anticipate that in the Design. I don't have the schematics, and have not disassembled it to have a look yet.
Good News is : GIANDEL Honoured their 18 month Warranty ! Got the Brand New unit just Today . No Charge ... But they want me to make a Video from some reason. I get to keep the Failed unit, so I may be soldering in new mosfets and capacitors as Well.