I have an XS power intellicharger 100E5 (brand new first time ever used) It's in the other room charging 2 xp3000's and a D2700 in paralell. It has been charging now for about 2 hours and it just made a really loud whistling sound that faded away and the house lights dimmed for a second. Is this normal? I've never used these chargers before, It caught me off gaurd and scared the shit out of me lol.
It's set at 25 amps, XS agm mode 12 volt. I wa stold to leave it all night but I'm kind of keeping an eye on it before I go to sleep.