Comments on Welcome to the Photovoltaic Education Network



Very nice information. In particular I found the excel data file with the solar spectra (AM 1.5 etc.). Can I use the data for a diagram in a text book about compound semiconductors which I currently write? What kind of reference should I indicate?

Best regards

Ferdinand Scholz

Prof. Dr. Ferdinand Scholz
Institut für Optoelektronik
Universitaet Ulm
Albert-Einstein-Allee 45
89081 Ulm
Tel. (++49) (0) 731/50-26052, Sekr. -26050
Fax (++49) (0) 731/50-26049
e-mail: [email protected]

If I click the constants in Module circuit design page. It shows the requested page not found.
It because due to misspelling of url, It's actually but it shows

I have been referring to this site earlier as well and find it very much helpful.

I think they are all fine after all. Maybe just a matter of time.


I am a new beginner in the field of solar energy since my specialization is a mechanical engineer and I have experience in electronics and electricity. Can I be a professional in renewable energy?

Yes you absolutely can! Maybe you have already become a renewable energy professional given that it's already a year since your post. :)

I am very thankful for always using wonderful teaching materials. Interactive Graphs on the web has not been displayed successfully recently. I tried it with Chrome, IE and Firefox as the latest FlashPlayer but it did not work. What should I do?

An excellent tool for learning principles of PV. It is a great information resource for applicable studies.
Thanks to all professionals involved in this contribution to a clean energy source planet. ;)

How do I get the copyright permission?? Thanks.

I am writing in reference to the possibility of using images and videos from the silicon solar cells manufacturing section of your website (PV education) for teaching purposes. I am currently teaching (as volunteer, unpaid), a virtual course about photovoltaics solar cells to a local public university in Juchitan, Oaxaca, México. I found your material very useful and if you allow it, I would like to use it (of course adding the references) for my video-classes. These videos are only share to people taking the course and at the end, I will remove all permissions to everyone.

I appreciate the time for reading this email. Whatever the answer is, I congratulate you for the excellent work done in the website.

If it is a course with limited duration then feel free to use the content. Thanks for letting me know.

Thank you very very much.

Yes. It is with limited duration and for a limited number of people. The virtual course has a duration of 4 months long but I am only using PV education tools in the last two weeks of the course for explaining the manufacturing of silicon solar cells. After the course finish, I am deleting all the content.

I am a volunteer online instructor at Instituto Tecnológico del Istmo (Juchitan, Oaxaca, México) but I am officially working at Saule Technologies in Poland as a material chemist in perovskite solar cells.

Thank you very much again.

I was trying to follow a link to Solar Simulation Light Sources from a suggestion by David Keller (see link below)

I'm with NASA and am doing a trade study on designing a solar simulator within my testbed for on orbit lighting conditions. I honestly have next to zero knowledge on how to execute something like this, it is very new to me. Any help would be greatly appreciated.

It depends on your application. Such as the size of your cells and the variation in spectral response of your reference solar cell compared to the cell under test. Multijunction cells also require a more accurate spectrum. If they are space cells the spectrum should be closer to AM0. Some light sources now also use LEDs

Is there a way I can access the videos and illustrations in these lectures for my claa?

I would like to access the videos in these lectures to use in my Class.
Is it possible for me to have access?

The way this course is designed is very helpful in introducing PV to a novice, without deep knowledge of semiconductor physics.

it was so easy to measure JV curves but now it is not available .

very good content about PV

Just wanted to say Many Thanks to you and to all your team
i learned and started my career through this website and it benefit me a lot, this web site is a good source for all energy engineers who want to be an expert in this field
Once again thank you from all my heart

Just wanted to say Many Thanks to you and to all your team
i learned and started my career through this website and it benefit me a lot, this web site is a good source for all energy engineers who want to be an expert in this field
Once again thank you from all my heart

Thank you very much for the invitation :). Best wishes.
PS: How are you? I am from France :)

Thank you so much for your kindness.

This site is very useful for everyone. It has been helpful to many students who want to study solar, and it will be helpful in the future.

Best regards
Sumi Yang

The lessons are very good for beginners

on this page:

under Section 5.3.2, the graph titled "Discharged Amp hr vs. cell potential" is missing the curves.

Overall, this is an excellent site with much useful reference info! Thank you!

I learn this topic

Hi -- I put a search term in the "search site" bar at the top of the page, and I seem to be searching a site that's larger than the one indexed here. For example, I entered "power output" and found a nice article on Residential Solar System Design.

How do I navigate to that material (and other like it) directly?


Many thanks for the animations

Do you sell PVEducation tshirts? The SpaceX solar team would love to buy some merch to show our support!

Dear author, can you share the formula of the picture of quantum efficiency in Chapter 4? I really need relevant data for research. Thank you!

As solar cell manufacturing continues to grow at a record-setting pace, increasing demands are placed on universities to educate students on both the practical and theoretical aspects of photovoltaics. As a truly interdisciplinary field, young professionals must be fluent with the science, engineering, policy, and market dimensions of this technology, in the context of a growing renewable energy economy

Really like this tutorial level explanation of PV principles. Would you consider adding a section on dark admittance as a method for isolating the performance of the back contact?


I specialize in Renewable Energy specifically Solar Installation, System Sizing, and Maintenance..


it is good source for solar energy

Thank you

Your solar intensity calculator for fixed surfaces has been of great value to me and my students over the years! I tried to use it recently and it appears to no longer be functional, no matter what information I enter the only returned value is the Azimuth. Can you please review it? Many thanks. this is the calculator I'm referring to

The page "Arbitrary Orientation and Tilt" ( ) does no calculations when I entered the values on the left side? 'Sun's Azimuth' is calcualtet, but '° Zenith' and '° Elevation' only shows "NaN" (not a number?)
Do I use this calculater the wrong way? It seems unclear where the values on the right should come from? But I noticed, that I cannot enter any values on the right side.
Can you help?
Kind regards