Amazon 300 Watt Chinese no name flexible so solar panels.
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Northernchateau
Solar Enthusiast
1st what is the specs on those panels and per the manufacturer can they be run in series?
2nd what are the specs on that unit they are plugged into and can it handle the VOC, voltage and amperage your feeding it?
3rd if 96% is the state of charge does that unit cut back on the PV input power?
iwasforcedtopickausername
New Member
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Hard to say for sure, but they look a little small for 300 watts.
1. I contacted manufacturer if they told me to run them in series before I bought them
1. I contacted panel manufacturer through Amazon before I bought them they suggested I run them two in series.
2.18- 95 volts
3. Good question I don't know for sure but I didn't have any warning in the manual about Not be able to charge 100%.
Since then I found out found out they were just discontinued on Amazon.
What I really would like to know is how the other off offbrand 300 watts perform. Others that bought them and worked out.
Before I selected them I found out the address of this seller in China.. I have a friend that lived in the same city and ask them to check the seller out. That location was shuddered.. He found him at another location And spoke with him. I was a little suspicious about these but I bought them anyways. Ending in Returned for refund.
Charleswgibbs
Solar Enthusiast
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- 261
Do you have a link to the panels, or the dimensions? Then we can use a little math and see if they are legit. There were some "300w" flexible panels on Amazon not too long ago, and after checking the numbers they were, at best, 150w panels.
You can also do a simple ohm's law calculation with the vmp and imp to see how many watts they should produce in perfect conditions. The panels are likely significantly overated.
You can also do a simple ohm's law calculation with the vmp and imp to see how many watts they should produce in perfect conditions. The panels are likely significantly overated.
Bud Martin
Solar Wizard
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- Aug 27, 2020
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- 4,833
Is the seller claiming that each panel is 300W? If he/she claims that, then you better get your money back right away.
The seller should be able to give you the spec of the panels they are selling.
I like to see the link to the Amazon.
The seller should be able to give you the spec of the panels they are selling.
I like to see the link to the Amazon.
Return request approved
The seller has approved your return request.
1200 Watt Solar Panel Kit, with 2pcs Charge Controller(40A) 4pcs 300...
$605.89
Qty: 1
Sold By: MYUELIN
Product details
BrandLOPMQRV
Material
Monocrystalline Silicon
Item Dimensions LxWxH
46.4 x 21.3 x 0.1 inches
Item Weight
4.07 Pounds
Style
Modern
Connector Type
MC4
- The flexible solar panel is suitable for various scenes such as RV, Trailer, camper, Boat ，Yacht,，cabin ，Tent，etc.
- It adopts PET， has high light transmittance, is safe and reliable, is not afraid of high temperature, and has no danger of burning or explosion.
- The component contains a bypass diode, and the circuit uses input over current protection and reverses protection design.
- With the latest lamination technology, it is lighter, softer, harder and has a longer life.
- Flexible configuration of solar module parameters for more flexible configuration of controllers and batteries.
Bud Martin
Solar Wizard
- Joined
- Aug 27, 2020
- Messages
- 4,833
What a scam!
It is very funny reading the review too and people think they really bought 300W panel, I guess that is how the seller is still in business.
Vmp is 18V, imp is 3.12A, that means the panel is 18V x 3.12A = 56W panel per published spec.
Specification (copy from Amazon)
Maximum power(Pmax):300W
Output tolerance:± 3Percent
Maximum system voltage:700V
DC Open circuit voltage(Voc):19.2V
Short circuit current(Isc):3.43A
Maximum power voltage(Vmp):18V
Maximum power current(Imp):3.12A
Cell efficiency:19.5Percent
Operating temperature(NOCT):45±2?
Temperature range:-40?~+80?
Number of cells:32pcs
Weight:4.07lbs
Size:47 × 21 × 0.1 inch
Standard Test Conditions : lrradiance 1000w/m^2,Temperature 25?, AM1.5
It is very funny reading the review too and people think they really bought 300W panel, I guess that is how the seller is still in business.
Vmp is 18V, imp is 3.12A, that means the panel is 18V x 3.12A = 56W panel per published spec.
Specification (copy from Amazon)
Maximum power(Pmax):300W
Output tolerance:± 3Percent
Maximum system voltage:700V
DC Open circuit voltage(Voc):19.2V
Short circuit current(Isc):3.43A
Maximum power voltage(Vmp):18V
Maximum power current(Imp):3.12A
Cell efficiency:19.5Percent
Operating temperature(NOCT):45±2?
Temperature range:-40?~+80?
Number of cells:32pcs
Weight:4.07lbs
Size:47 × 21 × 0.1 inch
Standard Test Conditions : lrradiance 1000w/m^2,Temperature 25?, AM1.5
The ones I bought were sold by company named MYUELIN now sold by LOPMQRV but looks like from same factory. If they're just as bad I want to stay away from all of them. They have fake reviews with not enough information provided to decide. I'm trying to find out if anyone had any positive experience with these is these 300 Watt flexibles.
Don B. Cilly
Energetic energy padawan
Are you sure?
The amorphous CIGS I have really look mono. They're quite black.
They only have 17 cells. Quite big ones, they're 4.5 metres long.
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Great! Thanks guys for your time. I guess I was blinded by a my hope that it was true since it would have fit my 300 watt requirements perfectly. I'm thinking this seller keeps changing his name. They've been selling these for a long time on Amazon. I don't get how they get away with it for so long.
I'm gonna let my former associate in China know that this is a scam too.
Now I guess I'm off to Santan solar for ridged types.
I'm gonna let my former associate in China know that this is a scam too.
Now I guess I'm off to Santan solar for ridged types.
Used to live near Auburn Hills Michigan now in Southern California.?
I have grown monocrystalline ingots......sliced them....etc...I worked in that industry as well as other high tech...
in the early days ingots were grown about 4 “ diameter and 36” long then sliced into wafers. The early “solar cells“ were rejected wafers destined for computer chips , microprocessors, etc.
CIGS ARE NOT monocrystalline......period....not if and or but.......... CIGS are vapor deposited on a substrate
monocrystalline ingots are grown from a seed crystal dipped into a vat of molten silicon....
(monocrystalline) process parented by American Telephone and Telegraph...1952 yup the phone company target use...power radiotelephone links and microwave repeaters for telephone circuits
Last edited:
Northernchateau
Solar Enthusiast
File these under "Snake Oil"Return request approved
The seller has approved your return request.
1200 Watt Solar Panel Kit, with 2pcs Charge Controller(40A) 4pcs 300...
$605.89
Qty: 1
Sold By: MYUELIN
Got it. Thanks...
Another clue it is a scam is the panel area is about 0.6m2 so at STC it would need to be 50% efficient for 300W. 10% efficiency is more typical of the flexible panels, which matches up with the 60W number.
It's a shame that the flexible panels are such a scam. It's one of those things that if they worked well it would really be great.
It's a shame that the flexible panels are such a scam. It's one of those things that if they worked well it would really be great.
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