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idiot. better to measure your penis
Fellow South African here.
So those hot spots tell me the lenses are convex creating spot lights when they should be concave to create omnidirectional lighting for PV testing…
2:05 "Something I learned on the way" lol
Hi, is there Sunlight resistance test for Stainless steel in PVDTiN coated?
Martin, Wanted to congratulate you on fixing this big black hole in Solar Panel testing. I already complained to another tester of panels and electronics that repeatability was most significant to any testing that is carried out. So whilst a reasonably accurate representation of sunlight is necessary (and it must vary depending on Latitude and air quality)it is vital that tests can be repeated. Well done!!
oh thank god! i did not like the beard! lol sorry
Obviously clueless about solar technology to think an LED grow light simulates the sun w.r.t. solar panels ….. what a joke.
Hello my fluke 177 has stopped making any sound which is annoying for doing continuity tests could you tell me what's rong and how it could be fixed please
Thanks for sharing your protocols! I'm in the process of building and designing a teardrop trailer in which I plan to use solar panels for the electrical systems i.e. lighting, music, a ventilation fan and a small water pump for the kitchen.Most of my camping is in the desert regions of the American South-West. This means lots of sun light and very little shade. Your testing will be a big help in deciding which panels to use. Keep up the good work!
Great work Martin. Although your beautiful maple workbench might be bleached by all the UV after all your testing is done.
This is super exciting. One thing I've been wondering as of late is how much does the maximum power point change depending on the light hitting the panel? For example, I have a 12v 50 watt flexible panel that I'm testing that is brand new with half size SunPower solar cells. At 75% of 18v we'd be at 13.5v for the approximate maximum power point. However, when the clouds cover the sun, does the power point go down? The reason I wonder this is because I think I might get better performance running two of those panels in series, so that the maximum power point is always above the battery voltage.
I have ordered another panel and will be testing it tomorrow to see. So far the performance of the panel is awful (approx 1% when the other panels are getting 5% in cloudy weather). I am excited to see how it performs on a sunny day.
Martin, you mentioned spectral accuracy in the first video, and it's clearly important since it's one of the three classification criteria for commercial sun simulators, but my eyes tell me your setup is a long way from simulating sunlight. I understand that this wouldn't matter for the purpose of making comparisons between panels, but I'm struggling to understand how you'll be able to provide useful characterization of real-world sun-illuminated performance. LEDs typically have very narrow spectral peaks, which explains the importance of color rendering index (CRI) in white LED specifications. This is partially overcome by your grow lights' use of several emitter colors, but they're optimized for photosynthesis, not photoelectrics. I would think that a panel of white LEDs with high CRI would be more representative of sunlight. Perhaps I missed something — how will you correlate your test results with sunlight performance? Also, is the added potentiometer on your DC load used for fine adjustment? Cheers, and great work!
This where Dr Rudi ended up. Awesome
Revved up like a deuce another runner in the night.
Thank you for going to all the effort to characterize the panels. TONS of work!
I wonder what effect using a wood grain desk has on this test, probably the only thing not normalized or reproducible in your testing methodology.
Nice job Martin. Thanks. I can't wait to see the next video.
You can control the brightness of an LED using PWM and an Arduino board.
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