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Comparison of new Bifacial 400-500 watt mono solar panels versus used 250 watt poly panels
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- čas přidán 21. 04. 2024
- Today we’re looking at the comparison of the poly 250 Watt used solar panels versus the new 400 Watt bifacial gain up to 500 Watt half cell mono panels and EG4 3000 Watt high frequency inverters in parallel. Connected to 2-51.2volts server rack batteries in parallel. The used poly solar panels state a 15.9 percent maximum efficiency. The used 250 watt solar panels are only 2-4 years old and only producing 112 average watts output. That’s 44 percent of stated 250 watt output. Have already had 4-used 250 watt solar poly panels go bad in last 4 months. The new 108 half cell mono 400 watt bifacial gain to 500 watts has a 21 percent maximum efficiency and averaged 350 watts out 400 watt stated output. The 400 watt bifacial solar panels has a 87.5 percent of stated 400 watt output. So the new bifacial solar panel is 2 inches wider and 5 inches longer than the 250 watt used poly solar panels and has 3 times as much output. You would need 3-250 watt solar panels to give the same output as 1-400 watt bifacial solar panel. That is insane that you can replace 3 solar panels with one solar panel. Using the EG4 3000 watt inverter allows us to connect up to 13-400 watt bifacial solar panels in series and stay below the 500 volt dc PV solar panel input. We can connect up your 5000 watts on the EG4 3000 watt inverter to max out the 3000 watt output. We will definitely be buying more 400 watt bifacial solar panels to replace our used 250 watt poly solar panels. I find it much more efficient and less expensive to connect solar panels in series. We can use 10 gauge solar wire since are amps are below 20 amps in series solar panel array. You also use less wire and less parallel connectors. Each parallel of solar panels you double to amps output from solar array. The 10 gauge solar wire is only meant for 30 amps on solar array. After that you need to go to a 8 gauge wire. Also on my 12kw Growatt inverter you can only have 150 volt dc input so that means your solar panels have to be 37.5 volts or less to connect 4 solar panels in series. I have solar panels that are 37.6 volts dc, 4-250 watt solar panels in series equals 150.4 volt dc PV input. So every few minutes my inverter has an over voltage input error code and disconnects my 6000 watt solar array that is 24-250 watt poly solar panels. I found some Canadian solar panels that are 37.4volt dc. When I use 2-37.6 solar panels and 2-37.4 with all 4 solar panels in series, I get a total of 150 volt dc for that solar array and my inverter no longer gives me error codes and stays connected to the 6000 watt solar array from sun up to sun down. Please Like, Share,Subscribe and also hit that Notification Bell for new video content. We are an affiliate of Signature Solar and buy most of our products from them that we use in the videos, when you click on the link and buy products through that link we get a small percentage of the sale and that helps us to buy more products to unbox, connect, test and review. We thank you in advance if your purchase some products through the links. Links below for products in video. Hope you have a truly wonderful and extremely blessed 2024.
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Hey, you jumped into the solar river early on and now you are moving with the flow brother. I'm still standing on the bank waiting to get in. Great job!
Come on in, the water is fine. Very easy to understand. Components are so much more simple than 4 years ago. Easy to get all your supplies at one place. Click on links in videos first products. Hope you enjoy the other videos. A lot of info in videos. I started 5 years ago not knowing anything at all about solar off grid or mini splits. Thank you and hope you have a truly wonderful and extremely blessed 2024
There are numerous places that have used or inexpensive panels now. Kinda insane. Also batteries are dropping in price hard.
@davidsalvador8989 I like the server rack batteries from signature solar that have built in fire extinguisher as a safety. Without that you can not put out a lithium battery fire. Don’t like messing around with building my own battery when the batteries they sell have so many safeguards built in. Follow link in video. Down from $1800-$2000, now around $1,200 each plus this week is free freight for $2000 or more spent. Saves about $250-$350 on freight cost. Good luck with your project
Pappa, GO FOR IT!
ALSO, YOU HAVE THE GROUND SPACE AGAINST THAT WALL TO MAXIMIZE YOUR SOLAR INPUT IF YOU INSTALL MORE GROUND MOUNTS, IF YOU RELOCATE THOSE PLANTS!
DON’T FORGET TO SHARE WITH US THE UPGRADE PROJECT!
I can’t wait to get more bifacial solar panels. They are so much more efficient especially in early morning and sunset. Get way more production then the used poly 250 watt solar panels and only using 1/3 of the space. Thanks for your support and comments. Hope you have a truly wonderful and blessed 2024
I saw a study lately talking about those bifacial have a pretty good result when hung vertically facing east/west instead of south. I am going to give it a try as an experiment. Would be neat to make a fence out of cheap solar instead of fence panels that may even cost more. Thanks for your comparisons!
A lot of good videos out there showing so many different ways to mount bifacial solar panels. Worth watching for great ideas.
Man I'm SO glad I watched this video. Those same used 250w-8.1a panels are the ones I was going to buy for $50 each. With a possibility of that much degradation in them I would be hugely disappointed in their output. I don't think it's worth me getting them for even $10/ea due to the work involved in hauling them onto the porch roof by myself at 69 yrs old. As Yoda might say: "A solar Guru....you are".
I actually think the used mono solar panels are worth it because they do better with shading, cloud cover, early morning and dusk also most importantly in series with inverters that can handle 500 volt dc PV input. I tried using in parallel for my Growatt 12kw inverter where the max PV input is 150 v dc. Was not happy with the efficiency but I used those same solar panels on my EG4 3000 watt inverter and they are so so much more efficient. I gave 6-330 watt mono panels in series along with another 6-330 watt mono solar panels in series, then I connect those on parallel. That’s almost 4000 watts between those 2 string combined into 1 string. I get 3000 watts input into inverter as where when I string of 3 in series then 4 sets in parallel, I was only getting around 2000-2200 watts with Growatt inverter. I like the used mono solar panels for the used price. You get what you pay for. I just bought 10-400 watt bifacial with 100 possible from back side and those are excellent panels at $124 each. Well worth getting brand new. I can get 3500-4000 watts out of those new bifacial but have a tough time getting 2500 watts out of 5000 watts used poly solar panels. I’m 62 years old who has been going through 2 incurable cancers for last ten years and just diagnosed with another cancer, so I know it is not easy setting up this solar system but it is possible when you are determined. Best inverter for money is the EG4 3000 watt off grid inverter where you can connect up to 5000 watts and up to 500 volt dc PV input. You just have to keep the dc amps coming in from solar panels below 20 amps. Check out my newer videos with these EG4 3000 watt inverters and see everything I run with these little lightweight power house inverters and EG4 LiFePO4 battery banks. Thanks for your input and I hope you have a truly wonderful and extremely blessed 2024.
I'm really jealous!!! I'm stuck with my homeoner wife stopping me!
My wife did not want me to start investing in solar of grid until she saw our electric bill drop to $150 in summer when all the neighbors were complaining there bill was almost $1000 fir one month using AC. Our entire system has paid itself off in the savings over last 4 years. We bought a lot of refurbished products that still has a warranty and have had no problems with components. Hope you are allowed to do diy solar one day. Hope you have a truly wonderful and extremely blessed 2024
I have 9 poly panels I bought when they got below $1 a watt in fact I got a pallet of 10 - 60 cell panels with shipping for $1800. I know I should have gone with mono for here in Oregon but they were still expensive comparably. I can get 13 kwh in summer but the winter I have got less than 1 kwh. I am at 24 volt and wish I would have gone right to 48 volt so was going to add more panels and thought of more used poly panels since they are so cheap. To try and match my summer power I would need 9 x 13 or over 100 panels. It looks I will not be getting rid of the generator but I did finally went with LifePo4. Something about the poly. Once in awhile on a cold morning after a rain or at least a clean sky the sun will come out from behind a cloud and jump up my harvest to 2400 watts which is max output but it doesn't last long, usually it is 1500 watts. It is like the sun shines a little different using the clouds to increase radiance. You can actually see it when you know it is happening. Poly may be a good choice for cold mountain cabins with clear, clean skies. Once they heat up there isn't much we can do to increase the harvest. Thanks for the information, I think I may go with the mono now. I liked and subbed.
I started out with the cheap poly panels because I have a large 1/4 acre lot yard and they were really cheap but seeing I can get so much more out if the same size solar panel, I’m going to spend more money and get the new solar panels. Thanks for sharing your comment with us. Hope you have a truly wonderful and extremely blessed 2024
hight tech solar panels are getting incredibly cheap these days, its no longer economical to hold onto old panels, which is why the second hand market is so saturated with them. Large business know exactly what they are doing replacing barely used 3-4 year old panels with new ones. I just spent £240 for a 1.6kw mini array (4x410w Longi Hi-MO panels brand new) 5 years ago that would have been triple the cost. If you sell the electricity back into the grid then you should 100% get all of those old ones swapped out, your RIO per panel will be less then a year probably. One thing is have have noticed though with your set up is that it is very close to the ground, there is something called shaded spot damage. If you expose one part of the panel to direct sunlight but have a shaded spot then that panel completely stops producing power as it creates a block in the flow, wherever the energy is blocked is where the failure will occur, basically shoving amps of power into one tiny spot creating what you see as burn marks.
Thank you so much for your valuable input. The burn marks were already in the panels when they were on pergolas 9 feet off the ground. But I understand what you are saying. I’m always playing with making or buying new solar arrays. I only have the burn marks in my used 250 watt solar panels. Have not noticed any issues with the mono solar panels. The new solar panels I bought actually have a lower 37.1 volt dc output which is great for some of the older inverters that can only have 150 volt input from solar panels. Also great for the new high frequency inverters that have 500 volt dc input, using 13-400 watt bifacial solar panels I can get close to the 500 volt dc input. I like there is less than 20 amps in the 10 gauge PV wire for 13-400 watt panels. I’m looking at some 370 watt Bifacial to 480 watt gain for only $96.20 each solar panel, Mono half cells. That is really cheap. My local place is asking $100 for used 300 watt poly panels. Being able to produce the same amount from 3 poly panels and only using 1 mono bifacial is great. Uses one third of the space. Hope you have a truly wonderful and extremely Blessed 2024.
Pure awesome! Thanks for sharing.
Thank you for watching. Those new panels are really nice.
Just a question are those by facial panels also connected in Siri or in parallel because that also makes a huge difference
The bifacial solar panels are connected in series at 37.1 volts dc each equals 371 volts total to the EG4 3000 watt inverter that can handle up to 500 volts dc PV input. Keeps dc amps below 20 amps using 10 gauge PV wire.
Just curious, why do you have a grown tree and another young one in front of those solar panels at the start of the video?
I’m in the process of removing my trees as I make a solar array. I remove 3 25+ foot palm trees 2 months ago that were shading the solar panels. But I really only need those solar panels in video for the summer when there is no shade on panels. In the winter I do not need that solar panel production. I often set up arrays in different parts of the yard to see how well that array does. But for the next 4 months those solar panels in the beginning of video will be in full sun all day long and those trees will not cast a shadow on the solar panels at all. Thanks for the question. Hope you have a truly blessed week.
@@diy-solar-guy Good idea I hate palms removed 25 queen palms over the years this is a desert not the tropics. Palms look nice at a resort in Scottsdale where someone else takes care of them.
@Mike-01234 palms are horrible out here. Too much upkeep. Grow way to fast and to tall to trim myself. Getting rid of all shading issues.
Wait till perovskite comes around.
Not sure what your comment means?
@@diy-solar-guy
"Not sure what your comment means?"
==
They are getting rid of old panels.
They want to sell them out before they become obsolete.
Got it, thank you for explaining
Yep perovskite and silica together will be awesome. gonna be huge gains to be gotten
@@gg-gn3re that’s awesome
lot of variables here, not just bifacial vs non bifacial. Are they all the same age? Did you individually test all the panels before hooking up? I've gotten plenty of panels that were used and were broken and got replaced with other used ones because they were very bad. Similar to how bad yours are. My "250 watt used" ones output 220-240 watts because I tested them to make sure they were good and returned the crap ones that were lower
I’m going to replace my poly panels with new bifacial sole panels this next year so no big deal with old panels. The panels still give me more that what I need at this point. Thank you for all that valuable input in your comment. Hope you have a truly wonderful and extremely blessed 2024.
@@diy-solar-guy All of your bifacials and any other panel, new or used, can also come with half input. You should always measure each panel individually before installing
@gg-gn3re yes, I need to purchase something to measure watts , any suggestions?
@@diy-solar-guy did you get my response or did youtube delete it...?
Did you send me a response for what meter to buy?
add another battery or 2 to get a true(r) idea of how much they can produce before 12 noon, oh and swap out the poly panels for bi facials a complete no brainer :)
Thank you so much for your comment and suggestions. We started with this simple set up and now heat and cool our entire 2 story 2450 square foot house and 600 square foot 3 car garage with only off grid solar. We use a 35.5 kWh LiFePO4 battery bank for overnight use. Our electric bills are 10-15 of that of our neighbors. We also heat our 15,000 gallon in ground pool to 86-89 degrees starting in March with a pool heat pump pool heater that uses 7500 watts while on and when our neighbors pool water temp is still in the 40’s and 50’s degrees. This is just a simple set up I ran for 2 + years in a shed when playing with solar. We have evolved considerably check out all the things we do with off grid solar and what components we use to do this. Thanks and hope you have a truly wonderful and extremely blessed 2024.
Thanks…
You are very welcome. Hope you enjoy the videos and what I was able to do with Solar off grid.
I am an MB Canada. I am just wondering where do you get solar panels for 30 bucks? Let me know.
I buy the used solar panels in Arizona,USA. I’m not sure they would ship outside United States. But it is santansolar.com
Can you do a video on your panels in parellel. Do you use a combiner box?
I do not use a combiner box but are moving away from using parallel arrays since the higher 500 vdc input from solar allows me to connect up to 13 solar panels on series and stay under 500 vdc solar panel PV input into EG4 inverters. My Growatt inverters are limited to 150 vdc solar panel PV input and is not as efficient at bringing in more watts and amps from solar panel as being in series. I am getting up to 80 percent more watts input when in series and connected to EG4 3000 watt inverter. I am also moving away from the used poly solar panels to new and used mono and new bifacial solar panels. I am seeing a huge increase into inverters with same watt solar panels with the mono and bifacial solar panels compared to poly used solar panels. I will try to do a video on connecting solar panels in series and parallel and the benefits & drawbacks of each wiring connections. Hope you have a truly wonderful and extremely blessed 2024
Thank you. I do have the eg4 3k same one you have. I was going to go with the ten 400 watt bifacial in series. Right now I just have smaller 100 watt panels. Total of 1200 watts in two different strings. Thanks again for the fast reply. Love the videos. Keep up the good work.
@D1petergriffin very nice. I started out with just 2 solar panel and just kept expanding as I saved more and more money with using more and more things on solar power. Now I’m running my 3 1/2 ton and 4 ton ac right now on just solar off grid while my pool is running on highest RPM’s along with a mini split keeping my house at 74 degrees for 2 story 2450 square foot house and running a 18,000 btu mini split in garage as well on solar keeping it 78 degrees while it is 105 out right now. All my solar off grid will be completely paid off from savings on electric bill by December of this year, 2024. I use almost double of what I used before setting up off grid solar. It is so easy now with the products they are selling. Hope you solar system works great for you.
i am i the same boat , i have 12 mono 320w panel and yea in the good conditions they actually put out full power but i recently buy 2 canadian solar 445w bifacial and put them in a victron charge controller and i was blowing away by there output they put out 1100w + i was in shock and almos every day they put more than what they a rated for , so now i thinking out changing all the panel 😓
That is excellent output. Where did you get those solar panels from and how much? I think I will have to try those Victron charge controllers. Thank you so much for sharing that with us.
@@diy-solar-guy is company here in Puerto Rico that sell solar panel the thing is that they are actually use solar panel , don't now were they get the panels from all my panels are from them .
@@soulkeeper514 thanks for the info. Sounds like you have a good local supplier. Have a blessed day.
,,😎
Thank you. It is fun designing and building an off grid solar system it’s even better when you shave 80 percent or more off your electric bill.
Have you had any solar contractors asking about your solar. Recently had a contractor at my door when told him I don't want solar he told me I already had solar. I found out he used a drone to fly around and take pictures of homes with solar. I tried to play it off as experimenting with solar he was asking lot of questions about if it was permitted how it was illegal I don't have rapid shutdown because my patio cover was connected to my home it was a fire hazard for firemen. I just played dumb because I was trying to just get rid of him without arguing I believe what he wanted to do was sell me solar so I would be "Legal". I might move mine to a ground mount that way can't do much about that last thing I want is the city bother me. You must be in Peoria, or Surprise no clue what those AHJ's are like I'm in Phoenix they probably make a big stink about it. I'm surprised your HOA hasn't bothered you maybe your in one not so bad. Some of these HOA's are overbearing. I'm glad didn't buy in a HOA on the flip side we do have some problem people who can't seem to keep their home cleaned up.
I’m sorry to hear that. I have not had any problems.
Your first problem is you comparing bigger by fish or soap panels with smaller solar panels and old solar panels.There's to new solar panels And if you're took care of your police, so apparently still be given yet 200 W, but you never took care of them did you?You already said they're used when you got them. My 24 years poly solar panels Still give me the power. They said they will give the day. I got him when they're brand new but didn't get that guy. I got him when they're brand new but didn't get. That again, I kept my panels clean and kept the wires. Good kept replacing the wires. If they got bad or if I didn't like them all on son. They still do very good for me. And besides, they start making power before the other one's will and they stop making power. After other ones will do we make a more power by working longer than the other ones.
Thanks for your input. We appreciate it. Hope you have a blessed day.