Hyperion 400-500 bifacial panels not producing close to rated 400 watts .

[Jason flores]

I have tested individual panels at 32° full sun due south 90 degree weather and the panels by them selves are only producing 213 watts . I expected 350 watts .why are they not producing ?
I'm using 8g marine wire 25 ft.

 

[mactech]

Being that you're in Las Vegas, the hot temperatures are not helping.

How much load do you have?

They will perform better in series at a higher voltage but many variables to consider.

 

[Jason flores]

Being that you're in Las Vegas, the hot temperatures are not helping.

How much load do you have?

They will perform better in series at a higher voltage but many variables to consider.

Panels are on our property in north az
Highest temps are 90-96 degrees

 

[Jason flores]

Panels are on our property in north az
Highest temps are 90-96 degrees

No load

 

[gelmjw]

With no load, your battery might be full! Where is the 400w supposed to go?

 

[Solar Guppy]

Yes you need a load, if your looking for a simple way to test and don't mind the cost of the tool, I recommend this. You can also search for other sellers, there are many, but you need the higher wattage unit.

 

[Citlalatonac]

Panels are on our property in north az
Highest temps are 90-96 degrees

Even if the outside temp is only 95° a panel will get much, much hotter. It's a black sheet in direct sun, temp is going to be closer to a fresh asphalt parking lot. Adding 20-25°C to ambient for full summer sun is a decent estimate, so that would be something like 60C/140f.

Datasheet lists output at NOMT as 302W.

Your solar irradiance also might be below the 1000Wh/m² they assume for STC. If you really want to check you can use the national solar radiation database. https://nsrdb.nrel.gov/

https://ark-usa.io/wp-content/uploads/2024/05/HY-DH108P8B__390-415W_B30C33_Long.pdf

 

[Jason flores]

Yes you need a load, if your looking for a simple way to test and don't mind the cost of the tool, I recommend this. You can also search for other sellers, there are many, but you need the higher wattage unit.

Even with battery at 56% ? No load just charging

 

[Solar Guppy]

Even with battery at 56% ? No load just charging

Which version of Victron smart controller do you have? If it is the 15 amp version that would explain what your seeing

FYI, charging is considered a load on the solar panel.

 

[Jason flores]

Which version of Victron smart controller do you have? If it is the 15 amp version that would explain what your seeing

FYI, charging is considered a load on the solar panel.

Yes sir I think it's 75/15 for a little 12v 100ah lifepo4 for my rv 12v system

 

[Jason flores]

Which version of Victron smart controller do you have? If it is the 15 amp version that would explain what your seeing

FYI, charging is considered a load on the solar panel.

Is 15a victron off ?

 

[Solar Guppy]

OK, that is your issue, it has a limit of 15 amps on the output and the most it can output would be that times the battery voltage which is what you are seeing.

 

[mactech]

I see others have provided the response I would have given, the output from solar will vary with your load applied. Your charger is a load to the solar panels. :D

I based your location on your profile and wish I lived there !!!!

 

[Jason flores]

OK, that is your issue, it has a limit of 15 amps on the output and the most it can output would be that times the battery voltage which is what you are seeing.

Your awesome thank you
Have a great day