Great charger,  very simple to install.  I used it for my 1992 K2590 diesel (dual battery) that didn't get much use to keep the batteries topped it.  Keep in mind this is a 1.5 Amp charger so it is slow, as designed.  Two complaints (doesn't change the rating as I was aware of these when I bought it) - Led indicator location and no quick disconnect on the wires to use clamps. I installed it under the hood and one of the batteries blocked the LEDs.  A second set on one of the long sides would have been nice.  The other improvement would be the quick connect to add clips for charging something else without having to remove this.