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AGMs and Gels typically both have higher voltages than flooded batteries, not only when fully charged but throughout most of the discharge curve.
Here's a comparison table of Open Circuit Voltages -- OCV (from East Penn):
Well, don't know why this **xx%%##*** Board won't let me attach a small file.
The 100% charged values for flooded, AGM, and gelled are 12.6, 12.80, and 12.85 respectively. "Or higher"
The 75% charge values are 12.4, 12.60, 12.65
The 50% charge values are 12.2, 12.30, 12.35
The 25% charge values are 12.0, 12.0, 12.0
Note that the true OCV can only be determined once the battery has been disconnected from the load -- charge or discharge -- for 24 hours.
Last edited by btrayfors; 03-23-2010 at 10:31 PM.