[topjustice]

I agree with most of the comments, however, the location of my garage is outside of town on another property I own and during bad winters I cannot access it sometimes for a couple of months. It’s at a higher elevation and gets tons of snow sometimes. I cannot keep an eye on the batteries, so I bring them home and keep them in a heated area of my cellar and put a trickle charge on them about every 5 weeks. I did the same for my two previous units but never had the hissing issue with the converter. It doesn’t seem to hurt anything but just curious why it’s happening. I do keep the inverter unplugged, but even with the inverter plugged in the converter still hisses.