Testing Gains From Bifacial Panels | Round 2

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  • เผยแพร่เมื่อ 24 ธ.ค. 2024

ความคิดเห็น • 104

  • @everydaysolar
    @everydaysolar  หลายเดือนก่อน

    Calculate Solar Cost For Your Home - geni.us/solar_reviews
    395W Bifacial Panels- geni.us/JFG5ho
    EG4 Ground Mount - geni.us/hbaYeE
    Round 1 Testing: th-cam.com/video/qYBnv_ywsiY/w-d-xo.html
    DISCLAIMER: This video is for entertainment purposes only. Also, this video and description contain affiliate links, which means that if you click on one of the product links, I’ll receive a small commission.

  • @andybrasher4355
    @andybrasher4355 9 หลายเดือนก่อน +22

    I think you’ll have to do a full day comparison to get the most accurate results. I have bifacial panels set up to run one of my campers and regular panels on another. The bifacial panels start charging earlier in the morning and continue later in the evening.

    • @putinscat1208
      @putinscat1208 9 หลายเดือนก่อน +2

      I agree.

    • @andyfromtoystory7426
      @andyfromtoystory7426 หลายเดือนก่อน

      Just because they start “charging” earlier doesn’t mean it’s worth any gain. You are talking about 5-10 watts which isn’t shit….

  • @hanswurst6674
    @hanswurst6674 7 หลายเดือนก่อน +15

    Several reasons for the low additional gains of the bifacial panels:
    1. Your mounts provide shading
    2. The ground under and behind the panels doesn‘t provide a high albedo
    3. The most important reason is, your panels are already maxed out by the direct sunlight. They are in their steady state under the given conditions and can‘t generate much more because of the temperature they reach.
    They are 395 Wp which would mean about 1580 Wh of Energy in 2 hours IF they could sustain that for the whole time, which they can’t due to heating up. The maximum sustained power is usually around 90% of the peak power with moderate air temperature. That would give you about 1422 Wh in 2 hours which is pretty darn close to your results.
    Bifacial panels can not shine, when the front side can already max out their long term power cap.

    • @freddurstedgebono6029
      @freddurstedgebono6029 6 หลายเดือนก่อน +2

      The best way for bifacial is elevation but some reflective material behind and around it to angle light into the back. And finally, and small water cooling misting on the top side to stay cool. Optimal performance

  • @johnzach2057
    @johnzach2057 9 หลายเดือนก่อน +13

    For me the big advantage that bifacial panels is that they can be used in vertical east-west orientation. This is the gamechanges since they can now be used for fences in roads and in agriculture. Unfortunately the backside only has 60% the peak capacity of the front side. Hopefully it will eventually get to 100%. And that would mean that a bifacial panel in vertical east-west orientation will be able to produce close to 90% of what a monofacial panel with angled south orientation would have.
    Furthermore east-west orientation will definitely help with the duck curves we are seeing all over the world.

    • @readyplayer2
      @readyplayer2 9 หลายเดือนก่อน +1

      Absolutely agree. Would like to see a comparison of vertical east west aligned bifacial panels with south aligned non bificial at the ideal tilt for your location.

    • @evertking1
      @evertking1 9 หลายเดือนก่อน +1

      So I'm about to purchase panels would you recommend these? Yes I guess?

    • @gregpochet4812
      @gregpochet4812 9 หลายเดือนก่อน

      I agree. A vertical EW orientation test would be the next one I would do.

    • @everydaysolar
      @everydaysolar  9 หลายเดือนก่อน +1

      The best bang for the buck panels I see right now are the REC 370W signaturesolar.com/rec-370w-mono-split-cell-solar-panel-silver-rec370tp2sm72/?ref=tWl8ELLgfBNOCr these are not bifacial but the price is great, looks like there is a 10 panel minimum.

    •  9 หลายเดือนก่อน

      The statement about 60% back side efficiency is false. Trina's NEG21C.20 Topcon panels have >80% bifaciality.

  •  9 หลายเดือนก่อน +3

    I see the same issue over and over again - the ground mounts that are not optimized for bifacial gain are used in majority of cases. The transverse bar is shadowing through the whole width of the panel greatly reduces the gain. Try to put a beam accross the panel on the front side to see the equivalent effect of shading.
    It is true that the backside light is much more diffuse, but still the mounts are waay suboptimal.

  • @frankthies221
    @frankthies221 9 หลายเดือนก่อน +4

    Yes, please test them in overcast conditions!

  • @dennislyon5412
    @dennislyon5412 9 หลายเดือนก่อน +3

    Hi Scott - not so practical for suburban roof or yard spacing, but what if you had panels spaced out behind panels, so the rear panels would be able to absorb direct sunlight, but they could be angled to reflect some of that light onto the back side of the forward panels for at least a part of the day. This would make the forward double faced panels way more efficient for some of the day if you could get the sun angle for the reflection figured out?

    • @Urugami45
      @Urugami45 9 หลายเดือนก่อน

      Heh...I said the same thing in another reply😂

  • @rolandrohde
    @rolandrohde 9 หลายเดือนก่อน +5

    Bifacial is going to give you much more benefit if you test it for a full day. Of course, during the two hours when the sun is just burning down on that south side, you won't see much difference, but the sun moves around in a large arc, and will sometimes hit the back of the panels directly, especially if they are angled as steeply as you have them there. That's where the bifacial factor will come into play.

  • @dieseldawg7132
    @dieseldawg7132 9 หลายเดือนก่อน +19

    You need something to reflect light behind those panels like white rocks or reflective material to get actual gains

    • @ngk330
      @ngk330 9 หลายเดือนก่อน +1

      I was going to say the same thing, needs to lay something white under and around the panels.

    • @ihatemilk09
      @ihatemilk09 9 หลายเดือนก่อน +1

      Agreed, need something light colored to reflect the sun light

    • @everydaysolar
      @everydaysolar  9 หลายเดือนก่อน +1

      Sounds like a good test 👍 Thanks for the feedback.

    • @Urugami45
      @Urugami45 9 หลายเดือนก่อน +1

      @everydaysolar I was going to come in to suggest that maybe these bifacial panels are really intended to perform best in large-scale solar farms. The panels could be set up in such a way that what sunlight reflects from the row behind would shine on the backside of the row in front of them and you would really get some more production out of the backside of each row.

    • @johnthompson9062
      @johnthompson9062 5 หลายเดือนก่อน

      White marble or here our limestone is cheaper and is white or light in color it was the same effect that snow would reflect.

  • @tjmooney4181
    @tjmooney4181 7 หลายเดือนก่อน +4

    Ive never had a monofacial panel hit 100% of its rated output, ehile ive never had a bifacial not hit at least 10% over its max output rating. I also use them on the brightmount arrays 5 feet in the air

  • @joetripp123
    @joetripp123 9 หลายเดือนก่อน +1

    EG4 now has an extension kit for the Brightmount rack kit. It adds 5 inches to the length and is fairly inexpensive at about $12 US. I've used it to get my four 44.6" Bifacials mounted.

  • @frankthies221
    @frankthies221 9 หลายเดือนก่อน +2

    Scott, I have one of those power meters( actually several). I have found them to be terribly inaccurate in both low current and high current conditions. One of them doesn’t show any current until it exceeds 2 amps! Just suggest you test them and get a feel for their accuracy.
    Love your channel.

  • @PjotrII
    @PjotrII 29 วันที่ผ่านมา

    I think your conclusion of the full sunlight is spot on. A "500W" bifacial panel is not 500W from the front + 150W from the back (= 650W), it is a 500W panel, where the back side helps adding a little extra that the front can´t take in.
    Also, while the panels are now better positioned, able to take more light, I have only seen fair gain results (10-15%) with REFLECTORS steering in light brightening up the backside. This is not that easy to add in REAL life builds.
    Also one suggestion is having a 20cm gap between panels so that light comes in between them, to add gain to the reflection.

  • @JenkinsUSA
    @JenkinsUSA 9 หลายเดือนก่อน

    6:08 RuttRo - It’s ok, at least for now bifacial is the way to go on ground mount. The EG4 Bright mount is great, I have two of them. Kinda curious about the width issue. 45” would be better, they offer a 6” extension kit too.

  • @michaelcassidy7645
    @michaelcassidy7645 9 หลายเดือนก่อน +1

    Do a full day comparison with them in an area that can get east and west exposure so the back side of the panels have more light hitting them.. Your only testing with the sun primarily directly over the panels so they can only get minimal reflected light and direct sun on the back side of the panels.

    • @everydaysolar
      @everydaysolar  9 หลายเดือนก่อน

      Fair point and thanks for the feedback!

  • @95dodgev10
    @95dodgev10 9 หลายเดือนก่อน

    Diy, roof mount on a large pole barn, grid tied, but big enough to reach a zero power bill minus service fees and battery backup for atleast a few days. I've been interested in the qcell bifacial 480w panels and the (i think its called) eg4 pro system. Little fuzzy on the exact name of it but its the grey and black all in one system. Worst part of the setup is about a 200ft run from the roof of the pole barn to the house where the inverter and attery setup would be.

  • @johng4928
    @johng4928 7 หลายเดือนก่อน

    The white tape on top of the blue tape is still not enough. When the camera is behind the panels, you can still see right through that white and blue tape. I can clearly see the grid. Cover it with black tape. Fully block out any light coming through.

  • @gregpochet4812
    @gregpochet4812 9 หลายเดือนก่อน

    I think you made a good, crucial point about the performance in all conditions(sunny, partial sunny, all clouds). What is the difference then? Also, I think a long term test, say a whole week, would be good and might yield better gains for the bi-facial panels. Also, as a few of us have said, a vertical East-West setup.

  • @ronbridegroom8428
    @ronbridegroom8428 9 หลายเดือนก่อน +19

    You were told this in your last test and I do not understand why you do not seem to understand that bifacial panels need to be up so sunlight can reflect onto the back side. This test is hardly different from the first test and you have a dark background. Given your test setup I do not understand why you would expect hardly any improvement. Frankly, if I was considering hiring you to do a solar set up for me these two videos would convince me to look elsewhere. Take care

    • @101bleedsblackx
      @101bleedsblackx 4 หลายเดือนก่อน +1

      Took that personally, huh? 😂

    • @xiaoka
      @xiaoka 3 หลายเดือนก่อน +1

      @@101bleedsblackxhe thinks TH-cam comments are like DMs. 😂

    • @Detonator007
      @Detonator007 3 หลายเดือนก่อน +2

      Frankly if you were my customer I would not want you as s customer as it seems you already know everything lol

  • @pallyzplayzone4282
    @pallyzplayzone4282 8 หลายเดือนก่อน +1

    How much light gets through? We have a patio on the south side of our house that my wife wants covered. I’m thinking that something like these would be a unique way of creating a roof system.

    • @everydaysolar
      @everydaysolar  8 หลายเดือนก่อน

      Yeah, I still have a “Solar Pergola” on the list of projects I want to do. I think it is a cool idea. 👍

  • @KevinJones-Peacefreak
    @KevinJones-Peacefreak 8 หลายเดือนก่อน

    I just watch another video on the benefits of bifacial panels and they were explaining that bifacial panels have 2 collection layers so any light the first layer misses or lets through hits the second layer to increase production. If this is true, your test can't block the second layer from the front at all.

    • @forrestgump282
      @forrestgump282 4 หลายเดือนก่อน

      best test scenario is 390w bifacial vs 390 monofacial

  • @Electronzap
    @Electronzap 9 หลายเดือนก่อน

    I wonder how well a white background behind bifacial would work.

  • @joetripp123
    @joetripp123 9 หลายเดือนก่อน

    Good test, I was expecting more on this one. I read about a test with bifacials and height. They need a minimum height raised off the ground to hit that max gain. I believe it was like 6 feet so like a full commercial rack would do it.
    I built a similar temporary base for my Brightmounts but I used 4x6's. Also due to the location requirement I didn't connect the two halves together in the middle so each rack is a two panel rack.

  • @ronbridegroom8428
    @ronbridegroom8428 9 หลายเดือนก่อน

    Also, having the panels right next to each other also prevents sunlight from reaching the backside of the panels.

  • @jasonbroom7147
    @jasonbroom7147 9 หลายเดือนก่อน

    Bifacial panels, mounted above snowy ground, on a very bright day, perhaps even with a vertical, east-west orientation. Most of the time, under normal conditions, they seem like an added expense without much added value.

  • @panospapadimitriou3498
    @panospapadimitriou3498 9 หลายเดือนก่อน

    maybe the tape lets the heat reach higher numbers losing a bit more power for the covered ones... but it depends the climate at your place....

  • @arnoldreiter435
    @arnoldreiter435 9 หลายเดือนก่อน

    my experience with my DIY solar is that one can never have to many panels.....no really! I bought 20 used 250w panels thinking i would never even use them and now a year later i am again looking for more panels. Looking back what i would recommend is decide how much you can spend and then build that system as a matched battery/solar setup, then after you have lived with it you will have a good idea what or if you need to expand it. As for the bi-facials they are not for every application. In the right setting they are a better choice such as a fixed ground mount in the winter will benefit when there is snow on the ground(a time when every watt is needed) and in the summer a ground mount will actually have the sun rising and setting behind the panels and bi-facials will take advantage of this. And there is growing evidence of using them vertically like fencing which opens up new mounting possibilities.

    • @sethsipakati6818
      @sethsipakati6818 7 หลายเดือนก่อน

      Those bifacial panel have advantage of conserving space, but how do they compare with tracked standard solar panels back to back.,?

  • @crazzyleggs8477
    @crazzyleggs8477 4 หลายเดือนก่อน

    Put white rock underneath the backside for reflection and test again?

  • @cppfb
    @cppfb 9 หลายเดือนก่อน

    Can you test and compare the energy production by placing various materials beneath it to reflect sunlight onto its rear side? Materials such as white-painted sheet, aluminum-painted sheet, aluminum foil, mirror, etc.? It would be great if you could set up the panel at least 5 feet above the ground.

  • @shelley131
    @shelley131 9 หลายเดือนก่อน

    I only have the EcoFlow Bifacial panels. Did not really see much of a gain on sunny days. I mainly use them at the beach where the sun can reflect some from the sand. At most I got about 200 watts out of the panel. If any advantage to my bifacial panel is that on cloudy days it produced 22 more watts over my 160 watt panel. Don't know if it is because the bifacial is a 220 watt panel. Regardless it was enough to maintain my 12V fridge over 4 days in cloudy conditions running. I might have run out of battery power had I only used my 160 watt panel by the 3rd day.

  • @jjm9902
    @jjm9902 3 หลายเดือนก่อน

    I simply added one more panel (bi-facial, cause that's what i had tho any panel is fine) and never consider the backside contribution. Nice vid, thx!

  • @adnanzahid009
    @adnanzahid009 9 หลายเดือนก่อน

    have you ever tried using a light guide to direct the sunlight directly from the sun at the bottom of the panels? in such a way that both the sides of panel are LIT properly?

  • @Ruralmn
    @Ruralmn 9 หลายเดือนก่อน

    I'm open to a commercial company doing my project if it is reasonable but if i can do it myself for half I'll do it myself. I'm looking to reduce or eliminate my power bill as much as possible.

  • @bdelight5422
    @bdelight5422 9 หลายเดือนก่อน +1

    I am doing the DIY off grid pair with DPU, 2 batteries, used Qcell panels. I feel good and keep looking at the input data, feeling I was mining gold coin. 😂

    • @everydaysolar
      @everydaysolar  9 หลายเดือนก่อน

      There is something about harvesting energy from the sun 💯

  • @philsmock4943
    @philsmock4943 9 หลายเดือนก่อน

    I'm thinking about DYI bifacial panel on a sun tracker system of some type. Thanks for doing these types of comparisons. Very interesting.

    • @everydaysolar
      @everydaysolar  9 หลายเดือนก่อน

      You bet, thanks for the feedback!

    • @sethsipakati6818
      @sethsipakati6818 7 หลายเดือนก่อน

      I wonder how tracking bifacial panel can be since the surfaces are facing opposite. May be you try tracking and compare with monofacoal panels.

  • @ThePlankeyeEffect
    @ThePlankeyeEffect 8 หลายเดือนก่อน

    I think the solar panels will give more of a percentage increase if possibly it is domed in aluminum backing... as far away as solar panels' height to "domed backing." I believe these reflective backings will greatly enhance the output to charge or usage. I will be testing my own project like this as I am about to build my Ecoflow unit.
    (I also think these solar panel companies would benefit in wind turbine power as well. It would be a great ad on revenue due to power = sun, power = wind (when the sun may not be out, or it may be night). Every source is building a greater energy future.
    That is my approach to this project of mine.

  • @tjmooney4181
    @tjmooney4181 7 หลายเดือนก่อน +1

    Bifacial make the most extra gains compared to monofacial panels on cloudy days when light is being dispersed all around

    • @everydaysolar
      @everydaysolar  7 หลายเดือนก่อน

      Thanks for the feedback!

  • @mgotovac
    @mgotovac 11 วันที่ผ่านมา

    You dont use mounting construction for bifacial panels.
    Make comparison at low insulation - cloudy day.

  • @wipatriot510
    @wipatriot510 5 หลายเดือนก่อน +1

    While GREAT in theory, bi-facial panels really aren't what they're made out to be, more of a novelty than anything else...
    The conditions that bi-facial panels are used in have to be so precise, it's not worth making the investment, in either the panels OR the infrastructure to support them...

  • @qubinets5014
    @qubinets5014 5 หลายเดือนก่อน +1

    i was getting 820 watts from my 655watts trina solar bifacial in perfect condition, its rare to happen,but possible.

    • @everydaysolar
      @everydaysolar  5 หลายเดือนก่อน

      Dang, thanks for the feedback 👍

  • @pvanderwall3473
    @pvanderwall3473 9 หลายเดือนก่อน

    Love doing the DIY projects and especially the projects you've been doing. 👍👍

    • @everydaysolar
      @everydaysolar  9 หลายเดือนก่อน

      Thanks for the feedback and I will keep poking around and sharing my projects 🙌

  • @davinatkins3047
    @davinatkins3047 6 หลายเดือนก่อน

    I'm curious why your test was only a few hours and started from 3pm. I feel like a reasonable test would take several days (with results for each day) or at the least be a full day.
    Especially for bifacial panels, my assumption is that the extra power is generated when the panels aren't in the ideal position during the day.
    I like youe channel! But this video didnt really answer the questions I jas about bifacial panels. I would definitely watch a more indepth test over several days.

    • @everydaysolar
      @everydaysolar  6 หลายเดือนก่อน

      Thanks for the feedback and agree extending out the test duration would help validate the end results. I am working on a ground mount where I can swap out different panels for testing. More to come 👍

  • @ngk330
    @ngk330 9 หลายเดือนก่อน

    How do I know if I need to ground my panels?

    • @readyplayer2
      @readyplayer2 9 หลายเดือนก่อน +3

      The short answer is you need to ground all solar panels.

    • @ngk330
      @ngk330 9 หลายเดือนก่อน +1

      @@readyplayer2 would having my panels set directly on the ground count? I have 400 watts sitting outside propped up against my house and run a cord into my Ecoflow delta 2 lol

    • @everydaysolar
      @everydaysolar  9 หลายเดือนก่อน +3

      Most people would not ground that type of setup. At least from my opinion I would not worry about grounding.

  • @OzarksGypsy
    @OzarksGypsy 6 หลายเดือนก่อน

    What is that small energy monitor dongle you are using?

    • @everydaysolar
      @everydaysolar  6 หลายเดือนก่อน

      Little power monitors usually used for RC battery monitoring. Here is a little deep dive on the units
      th-cam.com/video/y6Dmn69pbm4/w-d-xo.html

    • @OzarksGypsy
      @OzarksGypsy 6 หลายเดือนก่อน

      @@everydaysolar Thank You!

  • @dennisdickinson8337
    @dennisdickinson8337 9 หลายเดือนก่อน

    The only thing that matters is amps
    Ohms law shows us your panels are only putting in about 14% of your maximum rated output
    And clearly displays what a rip-off solar is

    • @dennisdickinson8337
      @dennisdickinson8337 9 หลายเดือนก่อน

      Please please put an amp meter between controler & battery

  • @1GREATDANE
    @1GREATDANE 9 หลายเดือนก่อน

    I used Nasa Vapor Barrier Material Stapled on Cheap Pallets and found massive gains due to this material reflecting almost like a Mirror behind My Panels

    • @hansscholte5472
      @hansscholte5472 9 หลายเดือนก่อน

      Hi GreatDane, sounds interesting! Could you tell a bit more please? Tnx

    • @1GREATDANE
      @1GREATDANE 9 หลายเดือนก่อน

      GOOGLE OR EBAY search NASA VAPOR BARRIER Material Rolls

  • @brianpfleuger
    @brianpfleuger 6 หลายเดือนก่อน

    Taping that cardboard I can see in the background to the back of your panel would have been a lot easier. 😜

  • @sethsipakati6818
    @sethsipakati6818 7 หลายเดือนก่อน

    Bifacials are a good idea if you don't like tracking the panels and you wonna save space.

  • @mikesgarage394
    @mikesgarage394 3 หลายเดือนก่อน

    You are sitting in the shade of the panels - gee why only 3%? Reflect some light on the back.

  • @kevindavis8442
    @kevindavis8442 3 หลายเดือนก่อน

    Your test is flawed, you are only trying to stop reflected light, but the bifacials generate power from the back from light penetration to the back too, not only reflected light

  • @frenchydampier2209
    @frenchydampier2209 6 หลายเดือนก่อน

    Bi facials need to be mounted vertically.

  • @schadlarry
    @schadlarry 9 หลายเดือนก่อน

    Your attention to and explanation of details is amazing. I'm more interested in a DIY, ground mounted grid tie system.

  • @frenchydampier2209
    @frenchydampier2209 6 หลายเดือนก่อน +1

    You really fail to understand the purpose and how to use bifacial panels.

  • @rtsrts2317
    @rtsrts2317 3 หลายเดือนก่อน

    "Maxes out with 4 panels" Ha ha, average joe got 10 panels on his bright mount.
    Nothing is final except death.

  • @gavinator354
    @gavinator354 7 หลายเดือนก่อน +1

    literally every single video you talk about your home roof installation. its been like 2 years. enough already lol

    • @everydaysolar
      @everydaysolar  7 หลายเดือนก่อน

      Thanks for the feedback and appreciate the support. The challenge is only 4% of our views come from subscribers so that is the thought process of keeping the same message in every video.

  • @PtBm2975
    @PtBm2975 9 หลายเดือนก่อน +1

    Won’t be truly convincing until you actually compare it to standard panels, not taped bifacial panels…

    • @everydaysolar
      @everydaysolar  9 หลายเดือนก่อน

      Yeah, I need to get 2 sets where they are both the same brand, dimension, but only difference is one is monofacial and bifacial.

  • @koputai
    @koputai 9 หลายเดือนก่อน

    The Ecoflow can take a maximum solar input of 800W, which is pretty much what your panels are without the bifaciality. Perhaps the Ecoflow is the limiting factor, not the panels. Maybe just run one panel into each Ecoflow, and do the test over a longer time.

    • @everydaysolar
      @everydaysolar  9 หลายเดือนก่อน +1

      The Delta Pros can go up to 1600W for solar but a longer test would help and would be nice to have time-series data as well to see the differences through out the day.

  • @jalpa9642
    @jalpa9642 9 หลายเดือนก่อน

    I'm in an RV living Full time in a RV PARK..... it sucks paying their Electric bill every month...! They don't even read my Meter half the damn time so they guess here and they guess there...... they even told me last July that my Electric Meter jumped 400 to 500 Kw and gave me an $83.00 Electric Bill.....! Thankfully, I read my Meter every evening...! I had Proof that they were full of crap. So I'm a DYI person could never afford the full Roof Solar Panel deal, too freaking expensive..! I got an ECOFLOW RIVER PRO.... Refurbished Power Station and the Extra-Smart Battery w/the ECOFLOW Cable for 1440 Watts of Power w/2-100 Watt Panels, ground mounted for now, expanding slowly as $$$ allows...! =)

  • @europana7
    @europana7 4 หลายเดือนก่อน

    What s waste of tape ... Garbage bags are cheaper

  • @EmmaHasted
    @EmmaHasted 9 หลายเดือนก่อน

    why did you do

  • @gavinator354
    @gavinator354 7 หลายเดือนก่อน

    lol are you purposely being silly? why would you choose WHITE duct tape to go over the blue paint tape? just use black to 100% guarantee no light leaking through!

  • @evertking1
    @evertking1 9 หลายเดือนก่อน

    Tape?? Ok

  • @user-el6cn3jf8n
    @user-el6cn3jf8n 9 หลายเดือนก่อน

    Keep testing wrong, someday you'll find it by accident.
    People have already patented it.