Need help with DIY panels, only getting half power

[Mike90250]

Mike90250 please help i could not find where is problem?i am using esmart3 40amp solar controller.

Clip the blue wire.

To find a problem in a DIY PV panel, you go over your schematics, test rows of cells, and follow the directions given in the kit. No kit, no problem. Take a couple electronics classes and learn how solar panels work, and then you will know enough to trouble shoot your own work.

It's impossible for me to instruct you how to trouble shoot your homebuilt PV panel. You have to use electronics theory, and start testing, which is way beyond the scope of what I am able to do, long distance.

Mike90250 please help i could not find where is problem?i am using esmart3 40amp solar controller.

As I told here i am new and i wanted to reply only jflorey2

correction new complete solar panel

jflorey2 help me that why you invest 500$ for only solar cell and he is saying that in 500$ you can buy full finised solar panel.in short this is not for you.

[Mike90250]

so you are telling me how it all works, yet you want help making it work ?

There are bazillions of solar panels using EVA, in the sun for 10+ years and no degradation.

Here temperature is normal 40 to 50 degree Celsius and here solar panel highest efficiency 15% and after 3 year getting solar cell micro cracks and solar cell snail trails.dear my solar panel work in uv 360nm and stable in uv and support full spectrum like 300nm to 1100nm and market based solar panel not support uv if they allow then solar cell will be burn or black spot.eva encapsulation not support uv360nm light.you can check any EVA encapsulation sheet and yellowing after some time but silicone not yellow and life 50 year aprox.

without glass and encapsulation i checked solar cells Voc and Open-circuit Current and I got Aprox 13volt and Open-circuit Current april in 7Amp and march in 8.34Amp.

[jflorey2]

. . 500$ for solar cell5.37w(160pcs) . . .

So you spent $500 for 860 watts of solar cells. If you are just doing this for fun, great - but you should probably be aware that you can solar for cheaper than that in finished panels. Prices in the US were 55 cents a watt before the tariffs, now they are up at about 70 cents a watt.

in short i am getting loss in Amp.here is solar cell detail:-Max. Power:5.37W,Material:Monocrystalline,Open-circuit Voltage :0.699V,Filling Factor(FF):83.59%,Open-circuit Current:9.908A,Conversion Efficiency:21.6%,Working Voltage:0.597V,Working Current:9.456A.

I used NSP 6inch high efficiency 21.6% made in taiwan solar cell.I invested 2100$ for 800w solar system(off grid).only slygard for 700$ and 500$ for solar cell5.37w(160pcs) low iron glass 200$.I used 15SQ045 bypass diode.each solar panel have 20pcs solar cell and two bypass diode installed.Should i install ideal diode for block reverse current/volt?

[bcroe]

I found it extremely difficult to get 6 inch square (4W) cells working without any fatal cracks
developing. The only success I had at all was with 3 X 6 (2W) cells. Encapsulated, but a
test point was put at the end of every column to help tracking down faulty cells (which I then
shorted out to salvage the rest). Bruce Roe

[Mike90250]

As you have discovered, there is the possibility of so many failure points in DIY panels, all I can say is that I hope you have not invested much money in them
Most cells sold as surplus, are production line rejects, and are not prime cells
Soldering properly and cleaning residue is difficult
Sealing the panels to prevent moisture degradation is impossible without a vacuum heat sealer system
Any of these faults, along with wiring mistakes, leads to trouble.

Trouble shooting starts with testing each panel by itself, under load.

Total voc is low 88volt.it should be 104 but showing 88volt and then I connect mppt then volt showing 69volt and 6Amp.

As I told here I have 800w solar panels and each solar panel voc 13v and 7.5 Amp in 40 to 50 degeree Celsius and 30 degrees Celsius at each solar panel give 8.34Amp.