Replacing House Batteries.
I need to replace my house batteries in my 2004 Coachmen Sportscoach. I currently have four 6 volt deep cycle golf cart batteries installed, two 6 volts hooked in series to create 12 volts then the tw...
Forum Discussion
Veebyes wrote:
AGM Zero maintenance. Sealed. Can be mounted anywhere, even inside the RV under a bed or wherever there is space. Can be mounted sideways.
Technically, AGM batteries are not "sealed". They can vent. Excerpts from AGM Batteries - Batteries by Fisher
A VRLA battery (valve-regulated lead–acid battery), more commonly known as a sealed battery or maintenance free battery, is a type of lead-acid rechargeable battery. Due to their construction, they do not require ventilation, can be mounted in any orientation, and do not require constant maintenance. The reduced venting is an advantage since they can be used in confined or poorly ventilated spaces. There are two primary types of VRLA batteries, gel cells and AGM.
.
.
.
There are two primary types of VRLA batteries, gel cells and AGM. Gel cells add silica dust to the electrolyte, forming a thick putty-like gel. These are sometimes referred to as “silicone batteries”. AGM, short for “Absorbed Glass Mat”, batteries feature fiberglass mesh between the battery plates which serves to contain the electrolyte.
.
.
.
VRLA batteries have a pressure relief valve which will activate when the battery starts building pressure of hydrogen gas, generally a result of being recharged at excessive voltage, typically greater than 2.30 volts per cell. Valve activation allows some of the gas or electrolyte to escape, thus decreasing the overall capacity of the battery. Rectangular cells may have valves set to operate as low as 1 or 2 psi; round spiral cells, with metal external containers, can have valves set as high as 40 psi.
The cell covers typically have gas diffusers built into them that allow safe dispersal of any excess hydrogen that may be formed during overcharge.
