Is use/store in use? (Not sure if Thor wired it up correctly and emergency start may only work in use--stranger things have happened.)
Are you properly using emergency start (I know an insulting question like "is it plugged in" but it needs to be asked):
- Make sure in use
- Start genny (just to get some extra juice)
- Hold down emergency start while turning the key
- Release emergency start after engine running (if it starts)
I'm not sure but there also may be a breaker on the chassis battery (others may be able to answer this question).
If you can get a voltmeter on the chassis battery check its voltage (if its fully charged you have a breaker/fuse issue if it isn't then a battery issue).