
I thought it was just the battery being low on charge so recharged it fully at home. No problems on later camping weekends but then we were on electrical hook-ups. But by end Sept the batter was completely flat and I killed my cheap charger trying to bring it back to life.
I thought it was a problem with the Zig system and the online forums really didn't address my particular problem. BUT yesterday I finally had the chance to use the multimeter on the system and yup no charge going to the leisure battery (which was my spare 075 starter battery). It's located at the back and has a fuse and a breaker on it. Both of those were fine. And then I remembered


So, the lesson learned here was to use the multimeter and then look for fuses on the main positive or negative charging cables (mine is on the positive) to see if they had blown or not.
A simple fix that was bothering me for months as I had no time to rummage around hunting down the root cause.
I also bought a proper leisure battery yesterday so the other 075 stays as a spare, plus another gas cylinder for all of our wild camping plans for this CV-19 affected summer.
Andrew