My tests had very little live load. I think only 100 watts so that is probably
the major difference.
We just use a color called satellite white. I don’t think it matters much.
From: castarritt
Sent: Friday, July 9, 2021 9:26 AM
To: AnimalFarm Microwave Users Group
Subject: Re: [AFMUG] Solar and shade for AE Fiber Cabinet
Chuck, is there a specific paint you used to shield against solar radiation? I
rolled a gallon of white elastomeric roof coating from home depot onto one of
our DDB boxes, and while it did drop the temp slightly, the results weren't
that impressive. I think the issue with our test is we chose a site that has
~1.2kW of power draw, so most of the heat was likely from the equipment in the
box rather than direct sunlight.
On Fri, Jul 2, 2021 at 1:21 PM Chuck McCown via AF <af@af.afmug.com> wrote:
20+ years ago, I set up 4 identical outdoor enclosures. Temp telemetry.
Some live load, don’t remember the details. They were about 24” cubes. All
started out as gray. Tried sun shields, exterior insulation, vents, fans,
peltier cooling modules. Silver paint, white paint. The overwhelming #1 thing
that lowered temps was the satellite white paint. By a long stretch. Then
filtered powered vents. Silver paint was worse than gray. I wonder if the
railroad still used silver. Sun shades did little to help if the box was
satellite white. Interior styrofoam insulation helped a bit, not much, but was
cheap and easy to add to the white paint.
Sent from my iPhone
On Jul 2, 2021, at 11:39 AM, Sterling Jacobson <sterl...@avative.net> wrote:
Super hot out here in Utah.
My fiber cabinets running Active switches are getting harder to maintain
and AC units on the side of the cabinets are starting to fail faster.
I’ve had the thought of shading them with a permanent four post structure
and a reflective white painted cover to shade them from the southern sun
exposure.
Then I thought, well, maybe it might be interesting to “shade” the cabinet
with solar panels as well.
Is anyone doing this?
The AE cabinets all have Alpha FXM 15 or 20A units running the UPS to a
string of four 12v AGM batteries.
I do have limited rack space in some of these available since the batteries
sit in a slide out section below.
Haven’t done solar in like a decade since I had remote WISP type sites.
Is this doable to offset power costs and also get the temp down for the
cabinet?
Or is it just a huge time suck and money pit for no real return?
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