Catalina 30 sailboat internal cabin lights only work when connected to shore power

Aug 6, 2024
1
catalina 30 tyee marina
We have a Catalina 30 sailboat and the indoor cabin lights work fine, but only when connected to shore power. The outlets in the cabin also only work when connected to shore power. It’s weird because everything else connected to the main power bank (autopilot, bilge, etc) works when NOT connected to shore power. Any ideas on what’s causing/how to fix this issue?
 
Sep 24, 2018
2,789
O'Day 25 Chicago
You would need to install an inverter and a transfer switch to make the outlets work when not plugged into shore power. This has the potential to drain your batteries very quickly
 
Apr 8, 2010
1,988
Ericson Yachts Olson 34 28400 Portland OR
If your interior cabin lighting consists of AC fixtures, they will only operate when AC power is applied (usually from shorepower).
Doesn't your boat have interior/cabin lighting that is powered by a DC breaker on your DC distribution panel? It not unusual for boats to have both systems in place, but I was not aware of this for a (stock) Catalina 30. What year is your boat?
Check your DC panel for a breaker marked 'cabin lights' or similar. Can you publish a photo of your boat's breaker panel. That will help others to help you.