Hi Glenn, I just looked through the manual for the Morningstar relay controller, and it looks like this should work. It can even power up to a 750mA load without needing a relay, which is more than enough to power one of those Zephyr Powervent fans. Thanks for the tip!
Cheers, Dave On Tue, Jun 3, 2025 at 3:12 PM Glenn <glenn.b...@glbcc.com> wrote: > Dave, I just pulled one of those out in a battery retrofit, I don't know > what the customer did with it... > Maybe a Morningstar relay controller could be setup using system voltage? > > > > -Glenn > > On Jun 3, 2025 14:22, Dave Tedeyan via RE-wrenches < > re-wrenches@lists.re-wrenches.org> 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 > -- > > [image: 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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