I built mine up in a PVC Junction Box with the large three position Speciality Switch Cover...
![](https://i.imgur.com/DXnppyQ.jpg)
Roy's image
I have two battery zones BAT1 and BAT2 and then I use a DC AMP METER off the Battery Selector Switch...
I have this mounted just inside my door to the POPUP trailer...
I glued the meter movements to the inside of the speciality cover...
No electronics involved here just two DC VOLMETERs and one DC AMP meter...
![](https://i.imgur.com/tjWzR1M.png)
Roy's image
I did add an ON-OFF switch on the inside of the cabinet as these mounted meters sure are bright at night... My plan was a night light but didn't realize how bright they would be haha...
If I ever bought one it would probably be the BOGART TM-2030RV-F...
![](https://i.imgur.com/LBXbV2S.jpg)
Google image
Roy Ken
![](https://i.imgur.com/SoQ6BfGm.jpg)