My friend that left the switch in the “Both” position is more mentally depressed than physically.
To follow up, after 8 hours on shore power, I was able yo open the hatch & put a “real” charger on the batteries. 1hour later the engine fired right up.
I like the suggestion about putting the 12 V...
I have a 2018 280 Sundancer. The last person that put the boat away about 1 month ago left the battery switch in the "Both" position. Today I went to get the boat and the batteries were dead. The hatch would not open. I tried to access the hatch opening to pull the pin from the hydraulic...