Posted by Lu Wei on July 24, 2013, 7:45 am
On 2013-7-22 16:57, Bernhard Kuemel wrote:
17.75%, 156*156 and 195 diagonal will give 4.197W. The difference is
small but could not be mis-labeled. Maybe the package is not original.
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Posted by Kevin McMurtrie on July 21, 2013, 6:16 am
Those conductor breaks look harmless because there are no islands. The
edge colors are normal.
A problem with crappy solar cells is internal leakage. They'll perform
to spec in full direct sunlight but you'll get zero volts indoors or in
the shade. There's a lot of IR indoor near lamps and a lot of UV
outdoors in the shade so a decent solar cell still has some use without
direct light. You can always do a side-by-side comparison with a known
I will not see posts from Google because I must filter them as spam
Posted by Bernhard Kuemel on July 22, 2013, 9:21 am
On 07/21/2013 08:16 AM, Kevin McMurtrie wrote:
My cells have 0.46 V and 39 mA inside in the shade. I put them in a
stainless steel pan as backside contact and touched the middle bus bar
with a multimeter probe. My desk is next to the window, it's a bright
day outside, no direct sun hitting my window, just some diffuse reflections.