Dave,
The Morningstar Relay Driver can work as a stand alone unit, it can
derive it's power from the battery bank.
This allows it to be programmed for voltage based relay operation which
is ideal for vent fan applications.
The relay channels are dry contacts and have a current limit of 750mA.
This will run a fan somewhat larger
than the good old Zephyr vents.
Roy Butler
Four Winds Renewable Energy, LLC
8902 Route 46, Arkport, NY 14807
607-324-9747
Education is when you read the fine print; experience is what you get when you
don’t.
“The less people know, the more stubbornly they know it.”
Although no trees were killed in the sending of this message,
a large number of electrons were terribly inconvenienced.
On 6/3/2025 2:22 PM, Dave Tedeyan via RE-wrenches wrote:
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
--
Logo <https://www.sungineersolar.com/>
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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