PV Array testing help

[AndyN]

I am slightly unsure about some of the tests on the DC side of my PV installation. I can fill out Voc (stc) and measure it in the string test too. Insulation resistance is no problem. My current short circuit string test Isc reads 0.99A. This seems low to me, any ideas? The DTi guide also gives 'Sun' under the string tests section. I think this means the irradiance measurement. I do not have an instrument to measure in watts per metre square but I do have a light meter to measure in Lux. Can I use this and do a conversion?
Have got my MCS accreditation assessment on Tuesday!

 

[Noshocks]

Anything above 0.00A is possible, it is the relationship between the solar irradiation reading and output of array which is important, 0.99A is not unusal if it is very overcast, I have had lower during miday in dark conditions.

I am sure the MCS assesor will ask if you have a radiance meter, just another expense I am afraid, got my Tenmars one on ebay for £75, i have seen same model for £150 so shop around.

This is the listing I bought from and arrived in 10days so will not arrive for assesment but recipet will be enough as I know other guys have had to prove they have purchased one at a later date after this as a non conformance. http://cgi.ebay.co.uk/Solar-Power-M..._Measurement_Equipment_ET&hash=item3a5d70e669

 

[Jie]

How do you test a single module to see if its working properly? Test the irradiance, then measure the VOC and ISC...then what?

 

[Jie]

How do I work out if its workin through using an irradiance meter and formula. In the logic guide it tells us that we take the Isc then multiply it by, (irradiance @ STC x irradiance measured). Then what? quite new to this so sorry if i am acting like a bit of wood.

 

[goodwilld]

Guys
This might help you!!!! if the file attaches with the formulas!!!!
Just enter the Isc and Voc and it will calculate the final Isc at the correct radiance.
Let me know if it works.

The file won't attach for some reason ( bl---dy computers.
I will send it via your email If you PM me with your details.

Down loading the sun for generations to come.

 

[The green man]

goodwilld,

could you possibly send the formulas.................to [email protected]

cheers

 

[infinity]

isc of panel/ 1000 * actual measured irradiance to get Isc

 

[grandfortune]

see the PV array testing post either goodwill or i will forward it to you

 

[Scott8266]

Hi could you send me the test file please much appreciated [email protected]

Cheers

 

[elecsol]

any chance of a copy of the formula on [email protected]

cheers

 

[qais.samara]

any chance of a copy of the formula on [email protected]

cheers

 

[Princesolar]

Any chance you could email it to me [email protected] thanks

 

[dundeesam]

Hi 1st post, could you please ping me the calcs also

Ta very much

 

[SibertSolar]

To anyone who's interested in the requirements under IEC 62446 relating to PV testing, maybe this might help? http://www.sibert.co.uk/uploads/spare_document/filename/73/Seaward_Solar_Key_Features.pdf

 

[jason121]

To anyone who's interested in the requirements under IEC 62446 relating to PV testing, maybe this might help? http://www.sibert.co.uk/uploads/spare_document/filename/73/Seaward_Solar_Key_Features.pdf

interested in this how much
[email protected]

 

[SibertSolar]

Will send you an email Jason, thanks