We use black boxes for batteries as the increase in performance in the winter overrides the damage to the batteries in the summer

On 08/15/2019 04:31 PM, Ken Hohhof wrote:
The difference between standard machine grey and just bright white spray paint from the hardware store is dramatic. I suspect everything beyond that is incremental.

Also back around 2005 when I ordered my first outdoor cabinet from DDB, I thought I wanted unpainted metal aluminum since all the traffic control boxes I see are plain metal or stainless steel. The salesperson said I absolutely didn’t want plain metal because it would get hot in the sun and what I wanted was the cream color.

*From:*AF <af-boun...@af.afmug.com> *On Behalf Of *Bill Prince
*Sent:* Thursday, August 15, 2019 6:19 PM
*To:* af@af.afmug.com
*Subject:* Re: [AFMUG] Solar load

If you look up insulating paint on Wikipedia, the entry there says all ceramic heat-reflective coatings are snake oil.

I did find a good discussion on Scientific American (https://www.scientificamerican.com/article/benefits-of-insulating-paint/). They don't exactly describe it as snake oil, but they also suggest that you not get your hopes up.

I suspect you can get your best results with a coat of reflective white paint, and try to keep it clean.



On 8/15/2019 1:12 PM, ch...@wbmfg.com <mailto:ch...@wbmfg.com> wrote:

    Be interesting to do a bake off between this and the plain
    “satellite white” I use.

    I have always found it interesting that highly reflective things
    like polished aluminum, chrome and silver paint seem to be really
    bad at reflecting heat/sun.  But we have all grabbed a chrome wrench
    that has been left in the hot summer sun and realized hot much it
    absorbs.  I am guessing what we see as reflective, Infra Red sees as
    flat black.

    *From:*Bill Prince

    *Sent:*Thursday, August 15, 2019 1:46 PM

    *To:*af@af.afmug.com <mailto:af@af.afmug.com>

    *Subject:*Re: [AFMUG] Solar load

    Which reminds me of this material that a friend clued me in on.

    You can get this at Home Depot (for example). It is pricey; around
    $250 per 5 gallon bucket, AND it needs a top coat of another
    material at near the same price. However, for an advertised
    reduction in temperature of over 60 degrees F, it may be worth a look.




    On 8/15/2019 12:35 PM, Lewis Bergman wrote:

        I remember Chuck doing a study on this same subject so I thought
        there might be some interest.

        Cabinet heat load

        Lewis Bergman

        325-439-0533 Cell


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