Hi, Sealed Lead Acid Gel batteries do not vent under normal conditions. Referring to 12 V batteries: Just make sure the maximum charging voltage is as per the batteries spec. (usually about 12.65V at 25deg C) My experience is that even when they have been left erroneously charging continuously in equalization mode at 14.4V they bulge, dry out & loose capacity pretty quickly but they don't gas and they don't leak. Sealed Gel cells generally should not be equalized at a higher charging voltage. So if you have an equalization setting disable it. Some chargers may have a temp sensor which should be placed on the batteries casing, this helps to adjust the chargers batteries charging voltage to match changes in temperature.
As such they are safe to have in the same room as your equipment. I have not yet used AGM type sealed batteries, but they are supposed to be much more durable under repeated deep discharge cycles, a batteries worst enemy in reducing their lifetime. For this reason they are highly recommended for Solar systems. Peter On Sat, Aug 7, 2010 at 5:05 PM, tahrens301 <[email protected]> wrote: > > > Hi Folks, > > I got a couple of the large AGM batteries for > a solar installation, and was wondering if > there is any condition that will lead them > to vent inside the enclosure? They are sealed, > but probably have one-way valves. > > Can I put the solar controller in the same > enclosure? > > Figured some of you folks have done solar stuff > before. > > Thanks, > > Tim > > >

