New to forum. I just purchased a 2004 36 convertible. Has 3126 cats and having electrical problems. 1. Port engine started intermittently giving start up issues. Now it's always. When in run position voltage gauge shows 9 to 10 volts and clicks when trying to start. Checked batteries they are a year old and show 1275 cca when tested at two separate places. Cleaned connections and still doing same problem. I tried using parallel with starboard running and still not enough. I jumped batteries together and then use parallel and it will start. Next I'm going to check connections to ground from battery but I'm hanging hard time tracing ground path from battery because they go under generator and I can't see behind. Any suggestions? 2. Other issue is with AC and DC panel when the battery charger is on port side dc panel works fine. If you shut Ac load off it kills dc side. Again batteries were both tested and are good. I didn't think Ac side and DC were connected in any way?