life expectancy of sealed batteries [RE-wrenches]

[Todd Cory, Mt. Shasta Energy Services]

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I have had too many problems with sealed batteries, even on grid ties 
with battery backup... so everyone gets wet cells from me now. I have 
the customer check the water levels monthly when they do their EQ which 
stirs the stratified electrolyte. Most customers get 10 to 12 years out 
of them.

Todd



Drake Chamberlin wrote:

>
> At 06:11 AM 1/7/2008, you wrote:
>
>> Not sure what batteries you were using but we have many off-grid 
>> systems with L-16 batteries that easily lasted 8 years or longer. 
>> Most of these had battery "rooms" and it was easy for the homeowner 
>> to check and water the batteries every few months
>
>
> It seems that L-16s work decently in off grid applications, but fail 
> where they are not regularly cycled.  The most convincing explanation 
> that I've heard is that the acid concentrates in the bottom of the 
> cells when they do not get regular cycling, and damages the plates.
>
> Whatever the reason, even with good maintenance and monthly cycling, 
> they seem to last about four years on grid, in my experience.
>
> Drake


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