Originally Posted by Ecopco
What's the next step?
If I access the coach batteries by disconnecting the battery disconnect switch do I just pop the battery cell caps and add distilled water? How much, just above the plates? What color of any should the battery water/acid be? I looked before and a few cells were clear and a few were tinted brown.
I absolutely love this forum as a first time RV owner it has been invaluable. I look forward to your reply.
2015 Solera 24R
Brian...you use DISTILLED water... not just bottled. Then pop each cap and fill to above the plated. It is good if you do this before charging the batteries but not always possible.
The color in some cells may or may not indicate a problem as the liquid should always be clear. If you want to reassure yourself about that to insure that each of the 6 cells is in good condition you'll need one of the turkey baster type hydrometers that you can get cheaply at autozone.
This measures specific gravity in each cell.
BEFORE you use it...fill the cells as above AND also give them a chance to go through a discharge/charge cycle before measuring.
Turn some stuff on in the coach 12V system for a while to partially drain the batteries for a few hours. Then plug in the coach and leave it on overnight to get a full charge on AND thoroughly MIX the distilled water and H2SO4 in each cell with a nice bulk charge. Now you can take your hydrometer readings while unplugged.
The main thing you will look for is all cells at the SAME level on the bulb.
One or two cells with different readings is a problem in the making.
If you wait 24 hours more...with the batteries unhooked at the negative wire...you can also determine the state of the entire battery even if all cells read the same.
1.265 is like new
1.225 is loss of at least 25% of capacity rating.
1.190 is less than half capacity...on its' last legs.