If your Sunny has the factory converter in it, leaving it plugged in 24/7 is not a good idea. They aren't really designed to maintain a battery properly. They will keep trying to charge the battery, even after it is fully charged. Doing this will cook the water/acid out of the battery and kill it. Newer style converters have different stages of charging and are able to keep the battery state of charge maintained, without damaging it.
Here is a quote from JohnB, in his
converter upgrade thread:
"After looking at the price and shipping, I could get a Progressive Dynamics Intellipower PD9260C converter that has 3 stage charging, 4 modes of charging, variable speed fans, desulfation mode and is a fully automatic high quality charger. And for slightly less dollars then the American upgrade. Basically with the Intellipower you are buying a high end quality charger/power supply that is field tested for many years. But no fuse panel and no 120 breaker box. You are paying for the better charger"
As far as the converter you have now goes, it would probably be a good idea to plug it in 24hrs before you want to go camping. That way, the battery will be fully charged. Another option would be to disconnect the battery if you want to leave the unit plugged in 24/7. My issue with that, would be forgetting to re-connect it before leaving on a camping trip. Without the battery, your emergency trailer brakes would not work.
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