Solar Energy

Sirius 415w BiFacial Solar Panels with White Tarp Behind! How Much Gain do you Actually get??



How much Gain can you get when you have with a White Tarp or White Rock or Gravel behine the New 415w (539w with BiFacial Gain) Sirius BiFacial Solar Panels?? Lets Find OUT!!

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38 Comments

  1. Mirror or GTFO!!!
    I kid, I kid! I have always been curious about exactly this, especially with snow. Not that in Aus we see any, but for places with clear skies and snow, I can see it being a big deal in winter.

  2. Here in Europe, they install mounted directly to struts on the roof, which means the panels are only a few inches above a clay tile (or slate in some cases).
    Some installers say they will still gain from the rear surface, whereas others say there is minimal scope for reflection under those circumstances, so it's not worth paying for bi-facial.
    Be nice to see what you measure with such a close fit and poor reflective surface?
    One of the main suppliers local to me in the UK pushes Rea or JA Solar bi-facials. Trouble is you'd never know what's really true unless you try both ways….

  3. Would you mind testing 80 degrees vertical SE/SW facing bifacial vs your 29 to 30 degree nromal south facing? Not sure if you can test the daily full production of 2 at a time. I have one of them eg4 mini splits to install, and I was going to use 4 or 6 of the 400 watt bifacial aptos panels on it, but I was thinking facing half SE, and half SW, and somewhere I read 80 degrees vertical is superior to 90 degrees, and or 30 degrees south with the bifacials. Thank you for all these videos.

  4. Painful to watch. For bifacial panels, why wouldn't you have a reflective surface ( foil or aluminum, full sun – not shade ) behind (not under ) so that the sun reflects to the bottom of the panel?

    Why is wHiTe UNDER THE SHADE OF THE PANEL the best reflective surface for bifacial? Use ur imagination guys.

  5. Most people aren’t installing their panel over a driveway, so yea, this doesn’t compare what most people would do. Maybe cover a few sheets of plywood with shingles to have a “normal” and then paint those shingles (or have duplicate plywood set) that you paint with one of the white elastomeric sealants from APOC or AMES.

  6. If it was my only solar panel and being that it’s bifacial I’d just flip it upside down and run it til the wheels fell off. Prolly have to drill a small drain hole in the framing for rain to escape.

  7. 1:54… That why I pre-drill holes for the screws on the ends of lumber..😉
    4:53… Is it just me or does the panel look like it's covered in dust ?
    7:44.. Was that an Air Biscuit ?…🤣 8:38… Another one ? Did you have beans for breakfast..😂

  8. Should have tested grass vs white tarp. Also, some sort of angled white pieces to reflect more of the light on to the back. Some sort of oil based varnish/poly so that it seeps into the pores of the shattered glass may reduce the diffusion and increase the output.

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