[RE-wrenches] battery vent control for lead acid

[Dave Tedeyan]

Hi all,

What are people using these days for venting a good ol' 48v flooded lead
acid battery box? I am upgrading an off grid system. There is a one year
old set of flooded lead acid batteries, so those will stay, but everything
else will be new. I plan on using a Sol-Ark inverter. The existing battery
box does not have any active ventilation, so I would like to add some. In
the past, I have used the Zephyr Power Vent Fans, like this one:
https://www.thesolarbiz.com/zephyr-power-vent-fan-for-48-volt-battery-systems.html
They don't seem readily available, but I think I can find one somewhere.

More importantly, what would you use to control this? Sol-Ark inverters do
not have any kind of relay for it. I have found external controllers in the
past (Yandina LLC Vent Control), but I cannot seem to find any right now.
There is one noted in the fan documentation (Solar Converters,
Inc. VCS1AH), but that does not seem available anywhere right now. Does
anyone have a recommendation for either a vent fa controller or a whole
venting solution?

Thanks!
-Dave
-- 

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Dave Tedeyan, P.E.
Owner | Sungineer Solar
p: he | him | his
a: 1653 Slaterville Rd. | Ithaca, NY 14850
w: www.sungineersolar.com <http://www.sungineersolar.com/>
c: (607) 270-0370
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