Now that we are beginning to see light at the end of the tunnel, we may want to consider visiting our coach so we don't experience any surprises. One of the more common situations will be the house batteries. For a lot of us they have been sitting dormant for over a year. Even though Beaver owners are the smartest on the planet, we should check our house batteries out even if the coach was plugged in or solar charged.
Deep cycle batteries will leave a small sulfate deposit on the lead plates over time and the acid mixture will stratify from sitting too long. After checking water levels, and charging them up to "float then full" I would suggest that you give them a "hydrometer test" to see what state they are in. A fully charged lead acid battery should read 1.265 specific gravity (at 80 degrees). You can purchase a hydrometer for under $10.00 at any NAPA parts store. If your test is less than specified and you have not "equalized" your batteries recently, here is how you can do this yourself. In the Inverter/charger owners manual under "charging", you will find Bulk, Absorption, Float, then Equalization. Enclosed is a picture of how I do it to keep the process under control. This sequence will make the batteries boil a little as the voltage rises. Read the instructions and initiate the process from your Inverter/charger remote panel. After you are done, wipe down the batteries with baking soda solution then clean and protect the terminals. Doing this per your instructions will extend your house batteries life. Happy trails to all of us. Fred