Try a Honda
Hi,I had the same problem when we moor out at Catalina. After looking at all the options, I found that a Honda EU2000 was a great buy. I didn't have air conditioning, but with 2KW of power, it ran everything on the boat, which at that time was a '87 Hunter 34. I had a 3-bank charger system because I had added refrigeration, so there was a load, but no problems. It even ran the hot water heater at the same time, provided I hadn't discharged my batteries too much. And at around $1000, it was the cheapest option that met my needs.I have since moved up to a 40.5 with an inverter system, but I kept my little Honda. It is cheaper and quieter then running the engine to recharge the system.