INCREASING Solar Panel Output for CHEAP!
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- Опубликовано: 19 сен 2024
- #solar #solarpanels #offgrid #offgridpower #solarpower #Ecoworthy #EcoFlow I increase the output of my solar panels for cheap in this episode.
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To test the power from rear illumination simply cover the panels themselves.. what you have left after they are covered on the front is what is being added from the rear.... this makes it easy to test.
not true. the panels will be considerably colder increasing efficiency. this would make it look like as if back illumination would add way more power than it actually does.
not at all, as the panels themselves leave light through and with the cover you avoid rear illumination but not the reflection of the light going through panels (and reflection from the cover).
Just add the reflector and collect data on power output before and after and also log temperature on back and front of panels as well as a control surface panel , not reflected.
Ok on the light colored rear gravel. But for God SAKE. I HOPE..your excessively long wire run uses sufficient cable sizing! What's it..?..300 ft.? Wheeeew. Otherwise..Kudos!
Oh!..I forgot..The wire run resistance is for the negative as WELL as the positive lead. So DOUBLE to that 300ft..so 600ft x the per foot resistance factor for the guage.
Nice I did the exact same thing I painted my rocks white and that worked amazingly well then I added a reflective panel like you did and that completed it and everything charges really well and I added white glow rocks around the panels and now it charges even at night for about 3 hours although its not much of a charge being at night but I was very surprised to see that it actually works, thank you for the video
As in glow in the dark pebbles? Can you elaborate?
When you are broke in California and gas is over 5 bucks a gallon… you pick up any and all change you find on the ground. lol every tiny bit adds up… thanks for sharing! I will play with that!
When you are broke in California and gas is over 5 bucks a gallon… you pick up any and all change you find on the ground. lol every tiny bit adds up… thanks for sharing! I will play with that!
As you get closer to high reflection on the back you might want to protect the connectors and wires from the light/heat.
If he is only reflecting and not concentrating sunlight, would this really be a problem? He could use thicker wires to compensate, or lower the current.
@@putinscat1208 Correct, you're only reflecting here, with far less than perfect albedo. The effect on the wiring is almost certainly less than the effect of them just being in direct sunlight.
I experimented with 4x8 galvanized tin. They reflected ok but there was a ton of heat as well. I found it much more useful to lay grain storage plastic on the ground under the panels. This are white, UV treated and have so far lasted 5yrs. Super bright under panels and bright enough that sunglasses are required.
@@1089up grain storage plastic? What is that?
@@PersonalStash420 Grain farmers use these to store grain in the field for the winter as apposed to hauling to a grain bin. Heavy tube shaped thick gauge plastic bag that is cut by machine to length they need, but can be easy 50yrds long. When emptied they are rolled up and disposed of. But if you can find them they have many use's and are long lasting. White on the outside, black underneath and UV treated
It’s pretty cool, that’s a pretty significant boost. I think another thing that would help would be to raise the panels up off the ground so you had less of a shadow space. If you lifted those 6 feet off the ground, you would eliminate more than half of that shadow space, and increase the amount of reflection that would affect the bottom of the panels I would think. 🤔
That's been a very popular suggestion.
@@TKCL if they are lifted up you can put the reflector underneath it and reduce the overall area footprint of the system while boosting the back panel face even more.
BTW, been doing a test of my own. I don't have bifacial panels but while working on angling the panels on top of my TT I found that having the front set of panels laying flat and the back set angled I gained a lot of power. The reflection off the flat panels helped the back get more light. Usually from around 2:30 on I lose a lot of power whether it's sunny or not due to trees. However since laying the front panels down I am more than doubling my power from 2:30 on. Cloudy days I was lucky to get 3 to 4 kwh but now regularly get 5 to 6 plus kwh. Even now where it's been cloudy since 1:30 today I'm over 6.1kwh with an hour and a half of daylight or so to go and still getting 485 watts. Before I'd get around 145 watts with the panels all angled.
There are roof coatings that reflect 98% of light. You could paint panels with something like that to help gather light. 💡🤓
I'm going to be searching for that here in the philippines, just what I need
Elevate the panels and add the reflected surface under the panels. This should give you a 10% increase or more in your system. I live completely off grid here in the West Texas Desert close to El Paso Texas and we have to set it up so we can get the best power rating we can get so we have fully charged batteries and the system runs through the night. We are not running Bi facial panels but I might just have to get me some.
Great video. For anyone up north bifacial is the way to go if you can ground mount.
I found bifacial to be really beneficial for colder climates. Those cloudy/winter days is where it shines.
also if you're more interested in being usable in places with lots of rain and cloudy weather instead of the monocrystal panels get polycrystalline panels. Not as efficient but can pull at least some charge out of overcast days with poor weather when monocrystalline panels won't produce at all.
There are some test that show in some situations vertical bifacial panes mounted vertically actually are the best idea. And some have even had the panels facing east west not south.
The reason this works so well is the cooling effect. Panels that heat up drop in efficiency enough to be a problem
Uni in Netherlands has tested and what you said is the best option.
Its not only the cooling effect, its also how the shadow is projected from those panels.
I’ve heard that as well, I wanted to try it but I’m scared that wind & the debris it kicks up might damage the panels!
I have the panels on my shed facing east and west. I looked it up before I installed them and I didn't lose much doing it that way, maybe 15% if I remember correctly.
@PersonalStash420
I have it on all 4 sides of my house. The East West panels are about 15% lower than the South panels. So that sounds about right.
My roof is a 4/10 pitch so I get 70% in the summer and 50% in the winter on my north panels
You'll probably get the best results with a bright white background. The problem with flat mirroring objects is that they reflect light in a specific direction, which means that at certain times of day, you lose all the extra light that is reflected in the wrong direction. You need diffuse reflection or parabolic mirroring.
Parabolic is the way to go. You need polished aluminum.
But overall this system that he is installed behind the panels is actually worthless.
When summer comes those panels depending on what latitude you're will be flat or pretty close to being perfectly flat on the ground.
The only way to overcome that problem would be to raise the panels in the air.
The higher you put the panels the greater the shadow that's cast behind it.
If you still want to go ahead with this you have to still use the parabolic setup but it would have to be further back behind where the shading is.
Furthermore you'd have to have additional reflection underneath the panels to get the solar arrays reflected for a second time. I do not use bifacial panels. I have some panels that face the sun in the east in the morning . The majority of my panels face due south. And then I've got six more of that face the West so I can catch the Sun almost until 9:00 at night in the summertime
A parabolic mirror will concentrate the sun energy in the form of extreme heat. You can hit several hundred degrees with a parabolic mirror focusing direct sunlight. You'll destroy your panels with that much focused heat. Heat kills panels.
@Wrenchmonkey1 True, that would create too much heat. Maybe combining the two solutions is the best way to go, using a parabolic mirror shaped white, or diffuse surface, so not all the heat is directly concentrated. Or maybe just moving the panels a bit out of focus.
@@Mikaci_the_Grand_Duke
Parabolic white reflectors is a really interesting idea.
actually, flat white reflects the best. At least that's what pot growing research has determined. You can't argue with Bro science. 😃
I bought three of those 200w bifacial mounted on a ecoworthy rack mounted on a base that I put 6” swivel dolly wheels on for mobility. I used an RV windshield aluminum shade behind it works very well with the reflective panel behind and easily movable as needed. 👍
That is awesome!
It all adds up. What you're doing won't reduce your power.
Panels are super cheap. I maxed out what i could put in and it supplies one third of my electricity - and I use electricity for everything: heat, home and car. Being able to make my own energy sure beats handing over money to petroleum companies!
If you add reflective stainless metal sheets both on the ground and on the hinged wall you were talking about, then that would help increase the gain even more, because the panels would use both the first reflection (sun-mirror-panels) and the second reflections (sun-mirror-mirror-panels).
I think it's worth mentioning that filling the surroundings with stone material or concrete etc, will make them heat up by the sun and also store such heat. You may have hurt your feet while walking on hot sand or street, but never when waking on grass.
Higher temperatures reduce efficiency by about 0.4 percent /k in PV cells.
Also concrete or stone material will turn green by the time and then they do not reflect well. So I would not recommend to create such "dead" zone around the PV panels 🤗
I used some mirrors, that can be purchased from thrift shops or discount stores, which greatly increased the watts.
Got a place that gives me large mirrors and smaller picture frames.
Check your temperature. Mirrors can cook your panels and greatly shorten their life.
@@tiggeroushCool them with water
I have a suggestion. Its basically a mirror effect. But using some plexi and using a mirror tint to the back of it and use it similar to the bubble wrap.
Its much more durable then the bubble wrap and hardier then mirror and should give you a similar effect!
Additionally, to increase the sunlight hitting the top side of the panel, you can add a reflective surface (at 60 degrees to a panel surface that's perpendicular to the Sun) along the bottom edge of the array. This can effectively double the sunlight hitting the front surface and provide a substantial increase in output. It will also increase the temperature of the panel so some sort of auxiliary cooling may be needed. Keep in mind that Increasing the temperature of the panel and doubling the UV energy hitting it may decrease panel life. However, if used to supplement panel output only on hazy days it would not cause nearly as much heating and the UV energy would be reduced considerably.
Anything is possible, but the heat concern is something we must watch here in sunny Florida.
Andy, You are a premier explainer and researcher among the best, if not the best! Many thanks for your efforts! 👍👍👍
Thank you for the kind words
I totally agree.
Those type of panels are great for limited space as they naturally receive around 25% more energy for output. Great idea for reflection :)
I use the large roll of aluminum foil from Costco, their brand, for when I need reflection. It's super cheap, very reflective and you get hundreds of feet for less money than you spent on that reflective material. It's a very cheap, and super effective, mulch around my potted plants. I live in the Sonoran desert, where daytime summer temps regularly hit 120°F. Reflectivity is the critical key to keeping the temperature off of your plants roots. Maybe that same super reflectivity will work here for you, too.
We buy that same foil
You will know when you have the best reflection on the back of your panels because the shadow will be less dark on the ground.
This was GREAT! One of your best videos yet, IMO.
I have the 100 w Ecoflow foldable bi facial panels, so the reflective bubble wrap will help speed up charging.
Thank you for taking the time doing all the 'tests' to save us the guesswork.
Glad you enjoyed it
Putting down white crushed stone underneath the solar panels will greatly increase the ground reflectivity and that will have a dramatic Improvement on your bifacial panel output.
Amazing diy channel. You are helping to educate, provide practical information,inspire others to save money and help the environment. Channels like yours is what makes youtube worthwhile instead of dramatic and political/controversial. Well done !
Agreed! No time for drama here.
Nice words, but unfortunately in this case it's the blind leading the blind. There's nothing practical or educational in this video. These panels preform best upright and in an east west orientation. This video is just a random guy shooting in the dark, hitting miles off target. I certainly hope you don't consider this educational.
Says the person saying pointing a panel exactly opposite of the sun is best. Videos all over RUclips disproving this "theory". At this point I'll test this since there's been enough people curious about it.
@@TKCL It's not exactly pointing "opposite to the sun" though, is it? It's more like one side facing the rising sun until midday, then the other side facing the setting sun ... you guessed it, until sunset. And both sides collecting reflected light all day.
You clearly are not qualified to run this test (same as the others who "disproved" this), so don't bother. Or do it, give us more to laugh at.
A practical way to enhance regular solar panels is to attach solar pool heating bladders to the back. This will keep the panels cooler, thereby increasing their efficiency and output, while simultaneously generating hot water.
Alternately run the heated water through a spare repurposed car truck radiator with a regular car temperature controlled electric thermo cooling fan to increase the panel efficiency and power output, suitable for extreme climates where this idea is practically usable due to the excess light.
If you're worried about mirrors breaking and creating a mess you could always add a thin layer of something like Fiberglass or similar to car windows- a thin layer of some adhesive material so that if it does break it'll all stay together and not make a mess. Nice experiment! I love this sort of tinkering.
Interesting results from your testing. You can get reflective mylar sheets. Amazon has 48" x 10' rolls for $26. You can get longer rolls for more money, obviously. It'll be a little more reflective than the bubble wrap. I believe that a curved surface will be able to passively track the sun better than a flat panel. Since you're not going to use the area behind the solar panels you could build a radiused reflective wall behind the panel and test how it tracks the sun without having to move the reflective wall. You could even try different height and radii to see which follows the sun better. The styling of the new EcoFlow looks cool. I'll be looking forward to your review. I expect it to be an amazing product.
Definitely an idea/project to consider.
Vertically mount bifacial’s to complement the regular system you have.
Bifacial Poly Crystallines for me! Most days there are cloudy, especially during Autumn and Winter Months, but even during all months. Polyscrystallines still produce.
This absolutely answers the questions i had about using bifacial panels. I'm in the southern philippines near the equator with a steep pitch roof that has a clear view of the sky. I was considering mounting on a frame that extends from the ridge either side but is has a low angle leaving significant space underneath at the eaves. It looks like painting the roof white or with reflective paint will make a significant difference. The only problem I'll have on really sunny days is heat, it's consistently high 80s year round and 95 plus in summer. Thanks for the very informative video.
Heat definitely reduces panel efficiency, but that's part of it.
The thought came to me that one way around any inverter problems is to use as many dc appliances as possible .
I have a small dc refrigerator that my panels run just fine . Also a dc coffee pot and a small dc water heater .
My dc coffee pot works so slowly 12v but it's almost unbelievable how slow and awful it works compared to ac.. now I wonder if there's better dc coffee pots out there
@@HighDollarHobo probably . If there is a 24 volt version it might be quicker .
My 12 v coffee pot is not too bad but not quite as quick as my AC. My ac is about 15 to 20 min. My DC is about 25 min.
@@bold58 thanks for replying.. my small coffee pot cobra from truck stop brand is worse I think maybe cut the car plug end off incase It restricts flow ill keep trying it I don't mind 10 more mins but not 30 mins
Here's a test suggestion; what if you had more solar panels similarly arranged in back? Although they are black, they are nonetheless REFLECTIVE due to the glass. To aid the effect you could have the panels in back at a steeper angle, just as you did with the bubble wrap.
You should try vertical mount. More reflectivity and less heat on the panels. And better in winter. No snow accumulation.
Very experienced gardener and landscaper… stuff will grow thru those rocks and if you weed whack to could take an eye out or anything glass… so you are left with weed hoing., hand pulling and poison… if you poison, you want to spray as seedlings start popping through. You could have put cardboard or landscape fabric beneath the rocks but eventually that doesn’t help… good news is, if you hoe when early growth comes through… that will be relatively easy work… don’t let anything green grow too long… if you stay on top of weeds for several years, you’ll have less to deal with in years to follow… but you’ll still need to stay on top of em … just be sure to do it when it’s easy. May take three to four outings each grow season.. in my area typically spring and fall. I suspect that’s similar for a lot of areas.
Thank You for supporting Solar and for All that you are doing for our Planet Earth....
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Mylar emergency blankets may be cheaper so you could coat a plywood with the mylar wrapper to make a reflector. Though anything cheap like that could work for a backing even a heavy sheet of acrylic. Also you may want to use marble limestone or something very reflective that is a white like a gypsom sand , titanium dioxide powder and maybe some powdered calcite and mix some very white mineral powders into your concrete. If you get a fluorescent powdwe like that is used in lights and mix it in concrete that could help too.
Don't know if this provides some perspective for some folks, but that 70 W gain you saw with the reflective panel is roughly the equivalent of the full rated power of my solar on the Landcruiser I lived in for 18 months back in 2006/2007. I had a single 80 W panel and a deep cycle lead acid for storage (can't remember the Ah). It was just enough to run an Engel fridge/freezer for maybe a couple of days without driving. That's a meaningful gain for sure! I suppose in today's terms, you're getting enough extra juice to charge a power hungry laptop. Can't hurt, right!
I built my own solar-electric grid on my place in North Texas, but with a "twist" I've not seen anybody else do.
I use small 12-18-volt PV panels both permanently mounted as well as on moveable (tracking) angled mounts, each location running a small 12-volt motor that powers a standard air compressor (like for a spray paint rig) using belts and pulleys to gain a mechanical advantage and they all pump air into a grid of 1/2" PEX pipe terminating at my "air battery" (a series of ginormous air tanks).
When I want electricity, I manufacture it by running a generator coupled to any of several air engines of my own design.
I build steam engines for a hobby, by the way.
I'm 75 and autistic and I think about things in a more simplistic way than most others.
Anyway, I get pretty much free electricity but without all the wires and fancy, expensive gizmos.
Do you sell any of this? I’m interested in an electric generator that works on compressed air, how you did it? I would like to compress air with solar during day and run the generator during nights on compressed air
Once the rocks dry well a coat of good whitewash will help in reflectivity. Just a thought. Great video.
If you change the angle of the reflective material throughout the year (to better use the available sunlight) move the 'reflector' closer and farther away to increase the potential benefit. This is among your most fascinating videos, and it's hard to not love them all.
Thank you for watching
vertical mounted panels with a bubble wrapped satellite dish (mega sized) underneath it. Science already figured out how to reflect in an optimal way. its a satellite dish shape. with the flexible bubble wrap i think you can make an easy approximation of one with just some vertical wood posts and run the bubble wrap between. I know that wasnt the purpose of this video... but you should totally try it.
One more note is if you made the bubble foil reflector concave, it can both gather more light as well as direct the light into a smaller focus to allow the panels to be exposed to a higher concentration of the reflected light. Good luck!
vertical solar panels with v-shaped mirrors on back and front sides. solar trench can be made from a v-shaped ditch. yes its ground supported. just plain stainless sheet steel or just galvanized steel sheet is durable for large surface area. just aluminium paint the steel sheets. or just silver mirror paint.
In the long run wouldn't adding another panel be more cost effective...
Yes and would also make a bigger difference on overcast days.
aluminum rolled flashing is highly reflective and durable for outdoors, maybe give it a clear coat. Can also make heat sinks out of aluminum sheeting to pull summer heat from panels.
Recently saw an interesting video about Bifacial panels that were setup vertically facing east/west, they actually produced 10-15% more electricity then conventionally laid panels.
I've watched similar tests that show it produces less, erratic results on RUclips.
Thanks for your sharing! I've investigated panels -- I've seen bifacial panels are better installed vertically - facing East/West. They found the reduction due to heat at the top of the day is rectified and the intensity from the East then West faces do great.
I've watched those tests myself with a few not having the same results. I might need to test myself.
With all the acreage you have it would be better to just simply add more panels and larger arrays. This will not only help you in sunlight but also when it's raining and cloudy. In fact you have enough acreage there you could put a half a megawatt of panels and you could make rain or rather electric power in the worst thunderstorms.
New sub here hello from remote rural off grid solar and wind Australia here, yes it started as a rather steep learning curve but in the past 11 years I was prepared to learn and experiment, I can see a beast of a system being built by you, many thanks for the time and the upload may give those panels a test run no shortage of sun where I am . So much so that I painted the roof of my structures with what here is called eco tech white paint it bounces up 2 15 F probably more and the UV back from the roof, worth a thought.
Thank you for watching and the support
If you are keen, try the same methods with the panel mounted verticle. I think you will be surprised with the results
You have to reidirect the sunlight wih two panels to properly mirror the sun. 1-A at a ht behind and above the panel ht @ An axis ht about 4 ft. to get the sun to point half way to the panels and direct that A panel to another B shiny Panel placed on the ground halfway between. It will make much more light than your single reflector . Also if you lift the panels off the ground 2 more feet you can redirect more light at a harder more direct angle. 90+ 90 .
Thanks
Thanks for sharing your thoughts, ideas and videos. Great video showing the properties of the bifacial panels. Would be interesting if you could video a line chart of your power output and overlay it to your videos. You could then see in the video the affect in sync to the video. You never know what nuances you might find. Might be worth trying to mount the panels in a vertical orientation. I’ve heard that is the latest craze, you make more power in the morning and evening, typically when needed by the power grid. Understandably not really relevant for you but the part I like is they should be less susceptible to damage from things like hail and could possibly be used in an urban setting as a replacement to a fence.
Just put black plastic underneath the gravel- no plants.
White shells used on road shoulders in Louisiana would be good for reflective light.
Anomet, Brampton, Ontario, Canada polished aluminum panels polished to mirror finish, great web-site, on-line sales, relatively inexpensive.
Wil Prowse did a video about these type Solar panels a couple weeks ago. He said you need to get them up off the ground quite a ways to get the benefit of bifacial gain out of them. Yet he had his laying almost flat on a cement slab. He was reviewing the Aptos brand. They sell 440w, 400w and 370w bifacial solar Panel. Signature Solar sells them.
Good work, lots of knowledge and effort getting good results!
Add an inline buck converter capable of handling voltage and amperage inline with output of solar to solar charger. You will have some drop but still get a decent charge rate to your battery bank
Point of order to what you say at 24:30 though you may have done the math already - you surmise with more effort you could get an increase of 10% with some back, side, taller, etc panels, but in the test you did you went from about 665 to 735 - that is already a 70 watt increase on the 665 which is more than a 10% increase just from the small 2' section of reflector just in the rear.
Also of note, that 665 is already higher than the base your array was getting by about ~20 watts, just from the baseline reflectivity of adding a light-colored ground cover, so if you're comparing from your baseline of just grass/dirt you've gone from about 645 to 735 just with that 2' strip, which is a 14% increase in production. It's probably realistic to get a 25-30% increase in output from a truly optimized reflector system for bifacials. You can also potentially set up a reflector or reflectors that will squeeze some more light onto the front of your panels without interfering meaningfully with the rear reflectors, so with just some foil tape, framework, and elbow grease it's probably realistic to increase a bifacial ground mount array's productivity by 50% or even more.
So panels have some weight and to automate adjusting the panels to follow the sun throughout the day in different seasons, would take another panel to power that adjusting system and hefty stepping motors. But to build a reflecting panel adjusting system should weigh less and smaller motors. And adjusting the reflector would give a big pay back and easier to automate. Just an idea, first thing I thought of.
hi , very instructive . i dont know were you live but ,with bifacial you should have them at a higher angle in the winter , you will also have more reflectivity from the back . i have a camp mid Quebec , in summer it's really easy with solar , but winter days are short and the sun is really low. i did alot of test myself with angles and Shade , shade is your worst enemy . keep up the good work
Hi, Andrew! I’m not sure if I ever told you what I taught before I retired. It was science and math. Your experiments and building projects are very satisfying to my innate inquisitiveness. It’s like a science lab everyday on your channel. Thanks for all your hard work putting all these interesting posts on your RUclips channel. It makes me happy.
Science was my favorite subject in school.
@@TKCL wow! Most of my students were in my class because North Carolina requires the science I taught as a graduation requirement. I had to spice it up and make it fun for them. To demonstrate the effect of changing the freezing point of water, we made homemade ice cream. My principal loved that lab because I always sent him a large serving.
If you would make the panels 3 or 4 feet higher off the ground, you would have much more light reflected to the the panels themselves because the shadows that the panels cast would be further back and you would have light reflected right under the panels themselves.
my personal experience is very simple put a bake watertight sale beneath your solar panel then fill it up with three or four inches of water works perfectly
Your largest gain would be from raising the panels up ten feet off the ground so the sunlight can get underneath. With having them so low you're blocking the light.
Bifacial panels are best with the from edge 42 inches off the ground. Gets them from out of their own shadow
I did something very similar..My ground mount is built with two, 4x4 posts on each end, using 2x6's to make my rectangle, with some metal strut to attach my panels..The 4x4 posts have a ten inch screw going through them and the 2x6's allowing the whole thing to be tilted up and down..I built a platform under on of the 4x4's and attached 4 wheels, the other 4x4 is in the ground about 3 feet, and is connected to a bearing assembly..That way I can tilt my panels to get the right angle, and I can move the side with the wheels to follow the sun, while the other 4x4 spins in place..And I have the same reflectix stuff underneath..Those 3 different hacks allow me to get every bit of sunshine..The total increase over just a regular mount is around 50%..I should make a video, because I've never seen that done before..
This is incredibly informative and I will be incorporating it into my solar project. Why haven't solar companies been smart enough to maximize efficiency using reflective enhancements? Again, thank you for this video!
Glad you enjoyed it.
The reflective material in reflectix is just a thin layer of aluminum. You could polish up that aluminum panel and get the same results in a much more durable package.
I might do that
Another tip for bifacial, is raising up your panels higher will get some more reflection onto the backside.
if you disable the auto retrun to home screen , you don't have to wear out the buttons to get back to the pv power menu item, by staying on the one you last selected
Raise the panels up on much longer legs, 42" under the bottom front of the panels is a good place to start. Next, get rid of the wooden box base. Use ground screws, drive posts into ground, or dig postholes & cement the legs to the ground. Gaps between the panels would allow a lot of light to get under the panels too.
Valid points
A little contact cement and a couple rolls of Aluminum foil stuck to those sheets would make a heck of a mirror. Get some cheap white paint or white-wash and coat the rocks with a sprayer every couple years, you'll need to shield the panels during spraying.
How about a motorized turntable - with solar and reflector. A sundial with light sensors could tell the turntable where to point (the direction of the sensor that isn't getting light because it is in the shadow). Just do a poll every hour to make sure the turntable/sundial aren't using loads of power.
It's a thought 🤔
Raise the panels farther from the ground, a bowl shape reflective, focusing towards the panels would give you a greater solar yield.
You can also get white ground cover plastic / weed barrier. It’s used in commercial greenhouses. Might be slightly cheaper than gravel + normal weed barrier and have higher reflectivity.
Edit: thinking about it the ideal customer would be somewhere arid where you need rainwater harvesting and have two shallow berms covered in white plastic to collect water and vertical bifacial panels running up the valley. The vertical position would help with air cooling and the diffuse light from the white plastic would keep it producing but not over heat it at midday giving an efficiency boost. Completely useless for me living in Ireland but fun to think about! Good idea for a lot of people in the Sahel in Africa though
You need to make one and place in the front on the ground will a little angle and see with the two of them reflecting I bet you get closer to 100 watts more power of charging.
I think so too
Helps if you also raise them up. Also the box base of the frame is shading the underneath of the front significantly
We have 9 x 195w Eco-Worthy regular panels and they have been working excellent!! Very happy with their performance with our Bluetti’s thus far!
Mobile home roof coatings. I had on 3 pairs of sunglasses last time I coated my roof.
They sell Chromed Aluminum Sheets at Lowes, Home Depot, etc. that are almost like a mirror finish. Also I would recommend a Dual Axis Eco-Worthy Solar mount that will hold 4 decent sized panels (300watt) and will track the sun as it goes across the sky .
I've been curious about the tracking units.
@@TKCL - 40% more power produced over the day than the same identical panels just facing South in a fixed mount. Starts at about $500. and up depending on which solar panels you buy in the kit.
You could even put some reflectors in the front as well single facial panels can be boosted as well by reflecting more on the front.
A cool idea,
Instead of using rock,
use water.
Have the panels framework in the water for cooling (cooler panels = greater efficiency)
& have the water bodies surface rippled
to vary the reflections.
A little pool garden bed with panels haha
and a tiny bit of energy to ripple the water.(Tiny motor flicking the surface).
U could have some gold fish too hahaha
White stonechip under the panels will do a lot. I've seen studies from snowy areas showing that bi-facials perform really well with albedo, not just "mirrored" surfaces.
Can you shear a video
How about making the actual solar panel slope adjustable with a pivot along the bottom edge. The objective being to get the low sun angle more square on to the panel face in Winter time etc. If the whole panel is more steeply inclined you can reflect light more square on from the rear side also. The gain in voltage would be really high.
Yes and my main shop solar array already does this. This small array is already producing what I need and then some. We are simply testing bifacial benefits due to reflectivity.
Kelly, you could try using mirror paint on treated wood. Might be simpler to maintain over time. Curious to see how that would perform in terms of reflection boost.
I've never tried it, sounds interesting.
Something else that would help is to raise it up higher, it allows more 'area' to reflect onto.
You may not realize it, but bifacial solar panels benefit compared to conventional panels on cloudy days, since there is more illumination to the back of the panels from other parts of the sky
just put them full upright, not facing south, but east west, like a fence. Sun will hit it from both sides during the day, as if you had double the panels in east-west config.
I've seen those tests, some say it works, some say it doesn't.
Question: If they're getting increases off of background reflections, why not leave a couple feet of gap between each panel so they can pick up the light bouncing off the ground in between them? The spacing is effectively zero cost, and you've already proven you'll get returns by your cardboard test, so it's a net positive guaranteed.
I was watching your reflection experiments today. If I was building the reflector, I would use a 2x2 along the top and bottom over the bubble wrap to prevent the wind from getting under the edges.
I would have recommended to put a membrane on the grass before putting the gravel on top to prevent that weed can grow but he, it is a start.
I’m using some 240 watt PV panels I purchased used from SanTan Solar. They were $48 each a few years ago.
If you cleaned, and polished that old piece of metal you have, that would be very close to a mirror. Also, if you put some more of that reflective wrap, in the front, and very bottom, that would help out alot, cause that is the area with most shade. Thanks for doing the video, i learned alot, and didnt know that double sided solar panels, even existed,
Paint your panel frame white and pour a slab of asphalt or concrete and build a pony wall around it, then paint the wall white.
I am guessing if you have a silver metal roof, you would get some reflection even if the panels wouldn't be angled like that (they are typically mount pretty flat). For your set up I was hoping you would do a test with actual mirrors, as that would be more cost upfront, but likely would produce even more energy to make up any additional cost.
I would recommend DIY types do some basic research on panel output voltage/wattage for series and parallel connections, and match with your charge converters, battery voltage, etc. I have been looking at this for about a week and have learned quite a bit. Also, just moving from 12V to 24V batteries can save $$ on wiring in your equipment and to your batteries.
On the mirror subject as an option, you can actually get plastic mirrors, so no risk of shattering with those.
Nice!
You could use tinfoil or silver paint to get good reflective surface.
If the panels were separated by a gap this would allow light to fall directly behind each of them , and with a reflected background plastic mirror sheet , problem being keeping them clean over time !
Nice to see another DIYer solar person. Reviewing those panels, you MAY need to add one more to cover yourself in summer temperatures based on the head room needed for your charger.
That's very true, I planned to add several more. I'll monitor it, I'm already seeing a 20v jump based on the cold factor. Summertime is a killer here in Florida.
I looked into bifacial panels and decided to not to go with them. It's my understanding that the cells will only collect so much light and its the same cells that collect from the front and the back therefore the cells on a bifacial panel if it collecting light from the back then have a shorter life and ultimately I wanted a longer life as I had more panels that I really needed. Good luck with your projects!