Comparison of new Bifacial 400-500 watt mono solar panels versus used 250 watt poly panels
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.
https://signaturesolar.com/?ref=diysolarguy
https://signaturesolar.com/-refurbished-growatt-12kw-split-phase-off-grid-inverter-spf-12000t-dvm-mpv/?ref=diysolarguy
https://signaturesolar.com/eg4-solar-charge-controller-mppt-500voc-100a-mppt100-48hv/
https://signaturesolar.com/eg4-lifepower4-lithium-battery-48v-100ah/?ref=diysolarguy
https://signaturesolar.com/eg4-ll-s-48v-100ah-server-rack-battery/?ref=diysolarguy
https://signaturesolar.com/pre-assembled-eg4-enclosed-battery-rack-6-slot-wheels-included-bus-bar-covers-welded/?ref=diysolarguy
https://signaturesolar.com/eg4-lifepower4-lithium-batteries-kit-30-72kwh-6-server-rack-batteries-pre-assembled-enclosed-rack-with-door-wheels-busbar-covers/?ref=diysolarguy
https://signaturesolar.com/eg4-ll-s-lithium-batteries-kit-30-72kwh-6-server-rack-batteries-with-pre-assembled-enclosed-rack-with-door-wheels-busbar-covers/?ref=diysolarguy
https://signaturesolar.com/hyperion-400w-bifacial-solar-panel-black-up-to-500w-with-bifacial-gain/?ref=diysolarguy
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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!
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.
I'm really jealous!!! I'm stuck with my homeoner wife stopping me!
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.
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 :)
Thanks…
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!
I am an MB Canada. I am just wondering where do you get solar panels for 30 bucks? Let me know.
Just a question are those by facial panels also connected in Siri or in parallel because that also makes a huge difference
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?
,,😎
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
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.
Wait till perovskite comes around.
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 😓
Pure awesome! Thanks for sharing.
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!