PART 2 EcoFlow 220w BiFacial Solar Panel REFLECTIVE Testing with EcoFlow Delta Pro

[@Pigmy001]

I just viewed this and was amazed how much effort you put into your testing, i have had my 220w with my new River 2 pro for 2 months, the very first time i used them while camping as you did on green grass i was totally surprised right off the bat i was showing a full 220w charge not every time but close enough to keep me happy. I have yet to try on sand to see the results. Thankyou for the obvious hard work you do. From the East Coast of Canada

[@TechMadeEzy]

Thank you very much

[@bsylvia1]

I set up my panels on top of emergency Mylar blankets & it works great. Layout the blankets, secure them down with wooden strips on all of the ends, then set up the EcoFlow 220W Bifacial panels on top.

[@ronaldhoppus9015]

You should cover the back panels to see how much they contribute without reflectors.

[@mattblair4123]

After seeing this video and seeing how efficient this Ecoflow panels are. You just made me realize my next solar panel purchase.

[@witHonor1]

I have 2 of these panels for my Delta 2, Glacier and Wave 2, and I've been watching a lot of reviews. Something about the bifacial panels I haven't been able to test, but just math, is that they're different circuits essentially. The front and the back have different amperages. The testing you just showed, in part of my mind, is that these are doing the best they can under every circumstance. I actually bought a set of tent poles(walking sticks actually) to use as the adjustable angle. Rather than leaning them against things, I can just prop them up by the northern holes by sticks. Vive Health, they were $5 each or $40 for 8, so I could even potentially use the case itself as a reflector. At the very least, you proved they're consistent and dependable. During Black Friday they were only $349, two for the price of one 400w panel that was on sale for $699. Winter is coming and I have to figure out how to play with all my new toys.

[@leonardguenther7384]

I have never seen a solar panel as efficient as that one. That is one really good solar panel.

[@piratelestrange]

Thank you for the hard work you put into these tests. I bought these 220 panels after watching your first video. I'm thinking about making some pvc frames for my panels, so I can get more light on the backside. Also, the frames should keep the panels straighter. Should also be easier to move around to chase the sun.

[@TechMadeEzy]

Thanks

[@NathanielHatley]

I picked up 4 of these off eBay. I'm also planning to make a frame and use the whole thing as a canopy. The most difficult part is dealing with the weight. I'm still thinking through my options for building something that'll be strong enough while still being portable and inexpensive.

[@TechMadeEzy]

Yes definitely weight more.

[@sainteal]

Great video! Love that you Love your dog so much!

[@TechMadeEzy]

Aww thanks and yes she’s 10 and thank God she is healthy and happy

[@NoZenith]

I'm just going to say this is already helping me. I don't know anything and I am trying to only make one purchase at this point. All-in-one battery, a refrigerator and probably the Wave 2 air conditioner / heater for a modular small cargo trailer camper. Thank you. I'm just trying to find out the most straightforward system to charge up something like a medium-sized ecoflow to make sure I have a couple days worth of battery if I don't have a chance to get good solar and I stay in one area for a couple days. I've also got the 400 w Ego inverter so I could take a few of those batteries along and if there's a lot of sun I could even charge those back up through the 100 watt input so I'm hoping to find a solar panel with the 100 watt USB output

[@ordinaryhuman3111]

Another word to describe that level of efficiency from a solar panel is "Splendid" and well worth the money.

[@BLASTIC0]

I would like to see all the ecoflow’s side by side, folded and unfolded, just to get a roundabout idea of size. Also would be cool to see a comparison of the the watts per square foot of panel.

[@earllholden4644]

Great minds think alike. I was out today and the Northeast using the same panels to charge my eco-flow Delta Max. I was able to pull 250 Watts at my Max. I made a simple wooden frame to hold the panels at the correct angle and easily adjust if needed. I tried some of the same experiments that you tried. With no sun on the back I was only able to produce 220 Watts. I also noticed after about 2 and 1/2 to 3 hours the panel started to get very warm. In the wattage went down. Now the panel says not to be smashed in water but it is water resistant so I took an old shirt that I use for a rag and soaked it in water and spread it over the panel to cool it down a little bit. That helped significantly for a little while but the wattage did go back up. My suggestion to you is if you can. Use the smallest connection to your device as you possibly can you may be losing wattage through the line as your line heats up. Second check the wattage output on the device and set up on the app. Sometimes it takes the app sometime for it. I've never posted a video on here before but I hope to do one next week on this subject.

[@earllholden4644]

Thank you and keep up the good work.

[@redmaple4559]

I have the 200 Max and this BF panel that I bought in a package 3 weeks ago , best I saw during charging using 50 ext and Max inside home was 209 watt , It is usually around what you are seeing 170 Watts average. Thanks for sharing your testing , great Video !

[@TechMadeEzy]

Thanks

[@jefftang8103]

The current of 220W is 12a, and Delta Mini seems to be 10A. Is it current limited so that the maximum can only reach about 170W?

[@TechMadeEzy]

Hmm you might have something Jeff Thanks for that note.

[@fege13]

@@TechMadeEzy I think this is the correct answer. The bottleneck is the Delta Mini which can only accepts 10A (10-65v) from solar pannel.

[@walterreil4001]

Thank you. Well done. If using the panels for emergency home home, then I would design an adjustable wooden open-back stand to place the panels on, running the full width of the opened panels, so the EcoFlow "stand" (or anything else) is not used in the middle of the back of the panels. Then I would use some form of mirrors, or reflectors, behind the wood stand so that the sunlight fully reflects along the entire back of the panels. Or maybe not get the bifacial panels and get two sets of normal one-sided panels.

[@c.y.997]

Can you try putting the panels on a concrete pad (like a driveway)? Thats an easy way to mount them and should provide alot of reflected light.

[@bradgrand79]

Awesome, had so many questions on this panel, I do hope you’ll post again if they put another special up

[@TechMadeEzy]

Thank you

[@shmayazuggot8558]

I usually get a jump from 190-200 to about 240 watts with a simple pair of white water proof paper like boards.

[@toddbissell4312]

Tks I still would like to see what snow might reflect. I know you save the white foam, maybe give these a try. Dowels holding up panels so as not to block back as much. Glue on top of dowels rubber arrow heads that will fit through the panel grommets holes. Lay flat put a bow type with fishing line as support in each panel. Like a rocking chair.

[@kd5txo]

I had a pair of 20 watt bifacial panels that were made in Russia and did some similar experiments with mirrors and all. I found the small gain in wattage output was offset by a great deal of hassle in having to constantly adjust the reflectors to keep an even lighting on the back. Perhaps the best approach would be to hang the panels by wires (to minimize shadows) over a large white or reflective background.. and just cope with whatever results you get. Now that the single faced panels are so cheap, it seems hardly worth it to fiddle with more-expensive bifacial panels.

[@1337brian2]

Cool experiment tho! I think I’m getting these panels look decent for the price and portability

[@2001cusito]

Thank you for the work you put into these videos. Very helpful.

[@TechMadeEzy]

Thanks Ed

[@carlperez2621]

Household mirrors are fair-to-poor reflectors of total light energy... In my college days (physics major) I recall seeing efficiencies on the order of 50-70% . There are such things as high-efficiency optical lab-grade mirrors, but the cost would be ridiculously prohibitive when we consider the task at hand. Your hard work in these tests is much appreciated. I imagine we were all thinking similarly: How to pump more energy into the rear panels... Your thorough tests using easily obtained materials convince me that for a best-case power boost on the order of 3-4%, perhaps it's best to let the rear panels absorb what they can without added reflective surfaces... especially when we consider the added hassle of repeatedly moving them all. Great series of reviews... .

[@zedwpd]

Just out of curiosity, place the mirror in the panel shadow right underneath facing straight up from the ground. The UV may bounce better like that then the direct sunlight reflection from 3 feet behind the panels.

[@Boilerone123]

In addition to this comment, I would like to see if using parabolic mirrors to concentrate the solar rays and hopefully increase charging wattage.

[@kornelcseri5115]

@@Boilerone123 Parabolic mirrors would burn out the surface of the solar panel since they focus light and that comes with increased heat.

[@peterthompson1228]

I would like to know what the wattage would be if you placed the reflective panels flat on the ground directly underneath the solar panel or slightly angled up. You took care to make sure the solar panel was correctly aligned but the reflective panels were way out of angle alignment with the back side.

[@rickmelcher6845]

Thanks for all your work to show us various “hacks” to get the best reflectivity. In viewing other YT’s, I believe the biggest gain is more throughout the daily….total daily watts gained. If you’re moving your panel to have a “perfect” angle all day a bifacial probably won’t give you much gain for the money. BUT if you have rigid bifacial panels on a fixed mount, then I believe the reflected solar energy will be absorbed at a higher daily wattage over the entire daily sun path.

[@TechMadeEzy]

Thanks Rick

[@Frankthesurf]

Great test. One thing maybe is that does the rear panel just soak up ambient sunlight. Maybe doing the test with the rear totally blacked out would give a different result.

[@richh6790]

Might have been useful to cover up the main panel to just get the reading on what the back panel was generating?

[@edwardv54]

Also try putting foil on the ground directly behind the panel.

[@ReviewsandTech]

Nice review and comparison too man, appreciate the hard work and explanation as well, I love that 220w panel, cheers.

[@TechMadeEzy]

Thank you I appreciate it

[@Chris78596]

Thanks for the time you took to make this video.

[@TechMadeEzy]

Thanks Chris

[@electechchannel3739]

Thanks, been wanting to do this myself, you saved me the trouble.

[@TechMadeEzy]

Thanks Check out part 3 when you have time, link is in the description

thanks for your tests! very informative.

[@TechMadeEzy]

Thank you

[@rar1001]

For a second, I thought you were going to write “Progresso” on that solar angle guide 😂. Great video!

[@TechMadeEzy]

lol thank you

[@georghausherr3210]

Thaks for you testing. Now I think getting some black panels might be better and easier than those bi-facial ones. One question however: you don’t seem to use any grounding systems. Isn’t this potentially dangerous?

[@TechMadeEzy]

Thanks for watching our video and with our PowerStations we don’t need any grounding the way they’re built grounding is not required.

[@indians_official]

Hi, I am a KZbinr who reviews camping supplies in Korea I would like to quote the Ecoflow 220W solar panel video you tested, can I leave the source and use it

[@johndyson2528]

The sales pitch for these dualfacia EcoFlow panels indicates better performance is achieved placing the panel on snow, but is reduced when placed on grass. So, I laid a white sheet on the ground, cited the panel on that and it increased the power input to my battery. Could also try white cardboard. The problem with your own tests is that the rear of the panels faced down towards dark grass and even the reflections from your mirrors, foil, etc made barely any impact. Sorry I don’t have the stats from my experiment, but I invite you to try. Just make sure the ground beneath and behind the panels looks white, capturing more incidental light. Remember also that when the panels become hot, they generate less power, which is common with solar panels. They produce more power when first set up (i.e. just taken out from my garage), then power generation drops as they warm up. I’ve yet to see if a battery-operated fan could help cool them!

[@travistran9971]

Can you test with the back of the panel facing the sun and take the baseline?

[@OriginalThisAndThat]

I wonder how these backside panels are connected to main panel. Ive heard something about if they are in series or parallel (or something) they wont produce electricity if some part is in shade or less power output so it limits the watts at the level thats lowest. Might explain the small differ with mirrors and other reflective materials.

[@Eris-sp6yt]

First thank you for this review! Regrading the back panel I think the problem is with the angle. It is best if the sunlight hits the surface of our solar panels perpendicularly, so the angle of incidence should always be 90 degrees. I think it's hard to find a perfect situation for a BiFacial Solar Panel unless you're using it on a planet orbiting a binary star. :) Or using some special mirror system.

[@TechMadeEzy]

Thank you

[@juandough6501]

Ditch the cover as kick stand. Replace with 4 small keyrings and a fold up tent pole across the top. Modified tent pole sections for legs in 2,3, or all 4 spots. Can be folded up and stored in cover. Practically the whole back side is now open for reflection. That said, for the minor increase in power from the back side, I'd rather have the same panel minus the back for a significant Weight loss. I just recently bought 2 on black Friday.

[@TechMadeEzy]

I prefer the 160w panel

[@NoZenith]

​@@TechMadeEzydo you still prefer the 160 watt panel?

[@TechMadeEzy]

@NoZenith yes that and this one depending on if your power setup can support it kzbin.info/www/bejne/ipLReWuwbZp2aNUsi=eGx-r4SlWt7iomyk

[@thebigjr9995]

Bifacials often do better on a light coloured floor or ground. Grass absorbs a lot of light.

[@kornelcseri5115]

To see clear, you may let the back side of the BiFacial solar panel facing the sun. That is the 155 Watt side. Maybe the back side is not working. I have read reviews when they got their Ecoflow solar panels delivered with an internal fault. The 160W panel was only producing 60W. Sent back and the new worked as intended well. So would you mind doing a test with your 220W BiFacial solar panel when you turn the back side of it towards the sun? I am curious of the results. If it goes well, then I will buy this 220W panel for my Topeak journey bicycle trailer.

[@jansugalski4856]

One important thing you did not take account of. With solar panels, a very small shaded part makes a disproportionate drop in the output wattage. I think this is true of all panels. I have the bifacial panels and in full sunlight, if I placed a 5" x 6" sponge on the panel and it produced a 25 to 30 watt drop in power. You would think that the percentage of area blocked would be proportional to the power drop but IT IS NOT. Furthermore it does not matter where on the panel the light is blocked. Also at the end of your experiment the panel sections were not straight which should have made a slight difference.

[@WizzRacing]

These panels shine in cool weather. As they hate heat. And adding mirrors and reflective material makes them hotter..Spray water on them and see what I mean..

[@valmiller4338]

Thanks for doing this review. I always knew solar panels are not that efficient. But with this video, you just shown me otherwise.

[@freelyroaming]

Interesting. I would have liked to see these panels flipped around with only the back pointing at the sun.

[@TechMadeEzy]

The backside actually produces less than the front side

[@freelyroaming]

@@TechMadeEzy yes. The spec says so. That is why I'd like to see what it would actually produce when it is used alone.

[@diydesi8433]

I am sure we all have bifacial friends n family in life😁

[@TechMadeEzy]

🤣

i have a few bipolar ones

[@TurnFullCircle]

I think you should have tried to maximise the light from the font only - use the mirrors to send more light to the front - this would have been more beneficial ?? Cheers

[@91lifetime23]

Great video, i thought the large mirrors would do better, is there no way of extracting that full 220w?

[@TechMadeEzy]

I was supposed myself. Bottom line it’s about the sun, the angle, temperature plays a part also, the cooler the panel it will perform better also.

[@sportychris990]

THX for this test. In total the bifacial benefit it is disappointing and not worth the extra money in my opinion. Really good do know.

[@toonvandenbroeck6393]

Test number 3, how many watts would the panel produce if you turned the panel to the other side? The side with 150 watts ? I'm curious about that.

[@TechMadeEzy]

Good idea as well

[@lcatalla7292]

I just received Delta 2 w/ 220w bifacial solar panels but did not come with the solar charging cable. Do you have to buy the cable separately?

[@TechMadeEzy]

Yes sold separately here is our link if you want to use it bit.ly/3Faydbm

[@merseyviking]

I just got mine (I'm in the UK), and it came with the cable. Seems they listened to their customers.

[@JamesBond-qv2ht]

What would happen if you taped aluminum foil directly to the back of the panels?

[@TechMadeEzy]

Not sure

[@JamesBond-qv2ht]

@@TechMadeEzy sounds like a good reason to give it a try.

[@presidentpotato222]

The Videos are good .. but we all come here for the gorgeous woofer

[@TechMadeEzy]

Brooklyn says hi 🐕

[@mcleodmayhem7086]

Would be interesting to see how much energy you get from just the back side of the panel from the mirror setup….

[@bradgrand79]

Hardly seems like the effort is worth it to add the reflectors. Seems like a very good panel overall

[@cavalierguy6754]

If you had the glass mirrors parallel with the rear panels, you would get higher numbers. You are reflecting off them instead of into them! Try it!!

[@subobo4719]

I wonder why the panels never come near the promised 220 Watts inspite of brilliant sunshine and perfect choice of angle to the sun.

[@TechMadeEzy]

Panels never produce 100% of the rated wattage, all panels have different levels of efficiency, and none of them guarantee 100%. In perfect conditions you can come close especially when the weather is cooler because heat affect panels as well..

[@tibdek4042]

What would happen if you would completely cover the back side (vs leaving uncovered)? Would Wattage drop? By how much?

[@TechMadeEzy]

I’m trying to get more wattage not less 😊

[@paintmasteryates77]

You should have done one more test. It looks to me like the backs of those mirrors were white.. White being the most Reflective color. You don't have to do it for the cameras but it would be nice to know if white works better.

[@BlueDroneBlues]

That is weird on the glass part being on the back. On my 160w I have a nice durable tough material like what is on the case itself. After all these tests. this increase was so little there wasn't really much left for the panel to give. Seems odd. I seen these panels produce over 180 watts and other times less. I don't know how much connectors play a roll in this? I guess some of these same panels just give more than what some of the others put out? I'd do a test myself, and the sky is beautiful, but my power station is fully charged. It wouldn't really be much of a test. The amps would be almost non-existent. Nice comparison and good video. Just a little jump of topping 6 watts max increase out from 166 to 172 was cool to see the jump, but just in real world seemed hardly worth the effort of setting that all up on a normal bases for that fraction of juice.

[@TechMadeEzy]

I like the 160w better to be honest, he performs well, and it’s definitely a lot cheaper cost wise

[@dubprocesslbc]

Are you using a XT60 or XT60i connector?

[@TechMadeEzy]

Definitely xt60i with the delta pro

[@OSussannah]

Whats the overall longevity of these portable panels compared to fixed panels?

[@TechMadeEzy]

They won't last as long as rigid panels, they do wear over time. I've seen wear just over a year.

[@OSussannah]

@@TechMadeEzy Thanks for your reply. I'm looking at the Ecoflow Delta 2, just for home use / back up and thinking a fixed panel would be much cheaper. As long as the panel is within required specifications, is it just a matter of attaching the right adaptors to the panel...and then plug and go?

[@TechMadeEzy]

@OSussannah @OSussannah just make sure you stay within specifications if you buy a panel that’s too strong you can actually damage the solar controller, here is the video we did on the delta 2 if it helps kzbin.info/www/bejne/qqfHpHyKrKyShbMsi=T__cEq31IMfaqevf

[@TechMadeEzy]

@OSussannah I would probably recommend just getting a 200 W panel that should do the job if you want I’ll place a link below on one I can recommend amzn.to/4azmCzT

[@I_Am_SciCurious]

Nobody believes me when I say this so disclaimer up front: I’m in hydroponic horticulture professionally. We’ve checked every type of reflective surface because light in hydroponic systems is crucial. The most reflective surface is white. Mirrors, foil, etc absorb light as a gray surface, while white reflects the visible spectrum. Focused light caused by lensing, by a mirror, window, etc can be effective in signaling, starting fires, and so on but with solar panels you want a broad area instead. You can get white paint intended for highly reflective roofs in the US if you really want to go for it, but a standard white paint on cardboard or white poster board should do the trick.

thaknks for the idea. gonna try it.

[@joelmize4051]

Interesting. I have a solution for an open back solar panel rack. Thanks for info.

[@Leonardokite]

Try turning off the AC fast charging and you may get better results with solar charging. A little birdie told me.

[@Mannn453]

try using delta 2 with 2 bifacial 220w panels and you will have about 500w input. I have achieved it without the cover supports, only the two flat panels on the floor and the deltA2. try two 220w panels connected and make a video again.

[@john-wk4gq]

should have put the back of the panel to the front to see how much it will charge that way

[@BLASTIC0]

So… 2 of the 220’s or 1 of the 400’s? Which would be better?

[@TechMadeEzy]

I would say two 400 W panels as long as your device can handle the specs VOCs etc. I believe they are 48v each

[@Bisztov]

Hi. What is the clip on the solar panel to help you set the right angle? Can you please name?

[@TechMadeEzy]

bit.ly/40Si16E

[@richardmondio7216]

It simply doesn't make sense that adding sunlight to the backside will not increase the voltage respectively - maybe the heat is causing the drop.

[@thesurvivalist.]

mono panels cannot produce much when shaded, they need to make poly bi-facial

[@jmrdrgz]

I just saw somewhere else that the temperature will top off the max and you won't get any benefits. Apparently it is only good in the cold, so they said. This appears not to be worth the money or overall any better than a single face.

[@НовыйШекель]

А почему не попробовали панель положить сверху на зеркало и фольгу?

[@НовыйШекель]

*просто поставить не на траву, а на зеркало и фольгу

[@TechMadeEzy]

We've done a few videos and we really tried everything

[@MacSociety]

maybe the panels are like vampires. can't see their reflection in mirrors. lol

[@ronaldalsup9517]

That is impressive. You were able to get 173 watts from a 220 watt solar panel. Efficiency at its finest.

[@hartwinbruckner9260]

It's impressive how little you get for so much money. There are better and cheaper out there

[@Butane-lj6tr]

So let me get this straight. Ecoflow says that the mirror can produce 220wp + 150wp on the other side. From the test this panel seems disappointing. Better get a monofacial model, no?

[@TechMadeEzy]

I prefer the 160w EcoFlow Panel for the price, especially when on sale. Or even a few 100w rigid panels they are like $99 each

[@piratelestrange]

Amazon has a $100. off coupon right now on this panel 8/14

[@TechMadeEzy]

Thanks

[@beautyofthailand7393]

What about a cheap parabolic reflector? In the front and back

[@Sylvan_dB]

Most solar panels void their warranty if you "concentrate" the sun.

[@DFENSFL]

Well done. I just got these. I am bit disappointed, I don't think the extra expense for this "bifacial" approach was worth it.

[@brentftaylor]

you’ll get more by cooling the panels

[@damianv1531]

Awesome

[@TechMadeEzy]

Thank you

[@rono33]

Drop a blanket on the front side! That will tell you what your extra money is getting you on the rear..considering the higher price of this panel for a 220w panel which is only about 10% more efficient on a perfect day than most standard one sided panels operating at about 70% efficiency typical. So paying extra for the "bifacial" side is only getting you 10% better efficiency? or less it seems (even with mirrors!!??) . I'd luv to drop a blanket on the front side and see what the rear side's total output actually is? Seems gimmicky and not performing

[@Sylvan_dB]

Bottom line - doesn't really do anything for me. I'm surprised bifacial panels are so hyped. Maybe they work better with a fixed ground-mount install.

[@lordtrini]

heat.... the issue is heat

[@TechMadeEzy]

Always and angle etc

[@winstonsmith935]

Efficiency of solar Panels is at best 30%. Improve that to 70% and you well on the way to decent return on your solar Power. Hydro Electric is up to 90% efficient and is renewable energy,.

[@1stRanger]

As I suspected this design is a gimmick, nothing more. That back side makes absolutely no difference. The difference you may think you've seen is within measurement error.

[@joeluisramirez]

byfacial like at work when your best friend BFF your 2nd grade BFF FOR EVER from elementry school STABS YOU IN THE BACK FOR THE PROMOTION????????????? AT WORK!!!!!!!!!!!

[@TechMadeEzy]

Lol that too, that’s more like 2 facial lol

[@hartwinbruckner9260]

The panel is just expensive and not worth the money

[@FelixRisingOriginal]

5w, barely worth mentioning