[RE-wrenches] battery vent control for lead acid

[Chris Schaefer]

G'day Solar Bozo's of old, lol,

I've found that over the years the  zephyr just doesn't pull enough cfm's.
My solution was to use the Rule 240-24V. I buy them from amazon for around
$70. These are generally used to vent boats prior to starting the engine
and are US Coast Guard approved. I normally mount them to the top of the
battery box and allow at least 12" before I vent to an outside wall. I
buy a 4" - 3" rubber adapter in the plumbing department of Lowe's with the
4" attached to the blower, the 3" to sch 40 pvc piping. Make sure you
screen the outdoor section to eliminate critters and flying pests. The cfm
is around 200. Unfortunately, they do not offer a 48v unit so I just tap 24
volts off of the battery bank (Steve H is gonna kill me on this one, lol)
and I use a 12v relay. For those inverters that don't offer a signal or dry
contact the Morningstar four channel relay driver works. It has a ton of
options.
Hope this is helpful.

Your Friendly Neighborhood Solar Guy,
Christopher

On Wed, Jun 4, 2025 at 8:37 AM Dana Orzel via RE-wrenches <
re-wrenches at lists.re-wrenches.org> wrote:

> Site looks active [updated 3/2025.]
>
>
>
> My 48volt zephyr fan is still working great since installed in 2015.
>
>
>
> _________________________________________________________
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> Dana Orzel                GREAT SOLAR WORKS!
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-- 

Chris Schaefer’s


*Tel 585-229-2083 or Cell 585-748-1870 *
*5115 S Hill Road ~ Canandaigua New York 14424**www.solarandwindfx.com
<http://www.solarandwindfx.com> ~ E-mail: chris at solarandwindfx.com
<chris at solarandwindfx.com>*


Thomas Jefferson, the author of our great Constitution, once said,
"democracy" will cease to exist when you take away from those who are
willing to work and give to those who would not."
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