battery box fan [RE-wrenches]

[Windy Dankoff, Dankoff Solar]

<x-flowed>>...  I don't particularly believe in the need. Anyone else
>had experience with H2 accumulation?
>
>Jeff


I have heard numerous stories of battery explosions over the past 25 
years of swapping tall tales, and was nearly witness to one. Every 
one involved high stupidity (overcharging using raggedy alligator 
clips, welding over a car battery on boost charge ....  Each resulted 
in cell tops blowing off, indicating that it was the H2 inside the 
cell(s) that exploded, although an accumulation above may have begun 
the reaction.

I have been told that it's difficult to contain a dangerous level H2 
unless you try pretty hard. It seeps through any common porous 
material. I have added passive ventilation in some cases mainly to 
please the critical, or to add confidence. I hate to see people go 
overboard and end up sucking cold winter air through their battery 
bank.

Windy

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