Newb Asks: How does shade effect solar power generation?
Posted: Sat Aug 06, 2022 10:10 am
by Gregski
after watching this Will Prowse Bypass VS Blocking Diodes in a Solar Power System YouTube video I decided to do some testing of my own
here is Amy's How to Wire Shaded Solar Panels presentation from the altE Store
Re: Newb Asks: How does shade effect solar power generation?
Posted: Sat Aug 06, 2022 10:16 am
by Gregski
I decided to do this because my Windy Nation 100 watt solar panels were grossly under performing, here I only have the single panel on the left plugged in, the other two are not even hooked up for this experiment
Test: 25% covered Result: the rest of the cells work, they generate power
Re: Newb Asks: How does shade effect solar power generation?
Posted: Sat Aug 06, 2022 10:23 am
by Gregski
only the panel on the left is hooked up to the inverter the two on the right are not even connected for this test
Test: 50% covered Result: the rest of the cells do NOT work, they do not generate any power
Re: Newb Asks: How does shade effect solar power generation?
Posted: Sat Aug 06, 2022 10:28 am
by Gregski
just for the hell-of-it-ness I decided to do the same from the other side, I honestly do not understand how the cells are connected in series on this panel, I will try to post a close up of the bus bars later on
Test: 25% covered Result: the rest of the cells work, they generate power
Re: Newb Asks: How does shade effect solar power generation?
Posted: Sat Aug 06, 2022 10:33 am
by Gregski
and once again did the same thing from the other side for the heck of it
Test: 50% covered Result: the rest of the cells do NOT work, they do not generate any power
Re: Newb Asks: How does shade effect solar power generation?
Posted: Sat Aug 06, 2022 10:37 am
by Gregski
here is what the back side of this Polycrystalline WindyNation (pronounced: cheap) 100 watt 12 volt solar panel looks like
Re: Newb Asks: How does shade effect solar power generation?
Posted: Sat Aug 06, 2022 10:39 am
by Gregski
and here I am pretending like I know what I am doing, this is on the continuity setting
I honestly don't get why this value is negative below when I measure across both diodes simultaneously
Re: Newb Asks: How does shade effect solar power generation?
Posted: Sat Aug 06, 2022 10:43 am
by Gregski
and here is Amy showing us How to test a solar panel diode
Re: Newb Asks: How does shade effect solar power generation?
Posted: Sat Aug 06, 2022 10:50 am
by Gregski
and here I am just measuring OHM aka resistance
Re: Newb Asks: How does shade effect solar power generation?
Posted: Sun Aug 07, 2022 12:51 pm
by Gregski
so it appears as though the one different solar panel aka the good one has diodes requiring only 150 millivolts to open up the check valve if you will to bypass shady cells where as the other two matching ones aka the bad ones have diodes requiring upwards of 550 millivolts to open their check valves
so I yanked those Schottky diodes as they are called I think what makes them special is they react much quicker than "regular" diodes and also don't run as hot, correct me if I am way off on that