Hi, I have a 12v 100ah battery that I built. I have 300w inverter that use with it to charge varies things. I never had a problem till i tried to use a charger for a E-Skateboard. The charger output is 42v 8.0a. The invert i have does not have a built in fuse or terminals to hook up battery directly so i have a Noco 12v cigarette plug and i plug the inverter into that. The Noco has a 15amp fuse that blew as soon as i plugged it in, what is the problem? tia!