The batteries are only about 1.5 years old and have been kept charged over that time. I run the generator about 3-4 hours each day and check the water level regularly. When at home I will plug the trailer in regularly for a few days at a time just to keep them charged up. I am planning to add 2 more batteries in the near future and hopefully some solar down the road as $$ permit. In order to add batteries though I will have to move the battery storage to the front basement, to do this I have to make some changes to that compartment to accommodate battery storage. The reason I went with the bigger inverter was to handle bigger loads when I do go to a bigger battery bank and solar. Guess I should have done a 1000 watt instead.
Perhaps I can sell this inverter and get one a bit smaller that can better serve my needs.
Steve