I installed a Drok 0.40 waterproof digital volt meter and a Moller #042221910
battery disconnect switch on the
battery box of my
Scamp 13. Both $13 from Amazon. Easy installation, and both work great. I switched the positive
battery lead and hooked the volt meter to the switch so I can turn everything off, including the meter LED display so it does not drain the battery even though it is very low ~ 0.4 milliamps draw. I installed the volt meter in the battery cover and spliced in a two pole trailer plug so I can disconnect the leads to remove the battery cover. The switch was installed in the end of the battery box, I have a group 27 battery and there is plenty of room for the switch installation but I did put a couple of 2x2 inch blocks on each side of the switch to keep the battery from shifting and contacting the switch. I made all of the cut-outs in the battery box with a utility knife and after installation I ran a bead of RTV along the inside edge of the cut-outs. I checked the accuracy of the meter; the meter display read 12.0 v and my Fluke meter read 12.05 v. I tried to post a picture but think it is lost in cyber space. Terry M