Photovoltaic compare

A 20 Watt crystalline silicon photovoltaic from 1998 vs 3 layer amorphous from Uni-Solar. Under dense clouds, the crystalline PV has no chance.



Datum
Weather
Battery voltage
Crystall-
lines
Silicon
0,2m²
20 WP
VOC
Charge current
Yield per m²
% peak power
Uni
Solar
0,5m²
34 WP
VOC
Charge currend
Yield pro m²
% peak power
2005-12-06 09:00 2005-12-06 12:00 2005-12-07 09:00 2005-12-07 12:00 2005-12-08 09:00 2005-12-08 12:00 2006-03-14 09:00 2006-03-14 12:00
Solar power despite snowfall
While the crystalline modul delivers even not enough voltage delivers the Three layer amorphous from Unisolar still 32,6 mA charge current. 398 mW from 0,5m².

Dense clouds,
Snowfall
12 noon in december
The snowfall has changed to rain. For the human eye as dark as 3 hours berore, but Canon S1 and the  Voltmeter show an evident increase.

Dense clouds
Rain
Cloudy but brighter
December 7th 2005 in Gartenau. Between the clouds is a part of the Untersberg visible. Maybe a little brighter than yesterday. Measurement shows even brighter than yesterday at noon.

Dense clouds
Dusky or dusky? Difference 1.8
Subjectively, it's as dusky as yesterday. But the electric power yield shows between dusky yesterday 9:00 and today 12:00 is an 1:8 difference.

Dense clouds
Morning sun behind stratus
Blue sky, over the near hill is some stratus. Subjectively is the weather much brighter than yesterday at 9:00am. But objectively, it was yesterday at the same time brighter.

Blue sky
Sun behind stratus
Winter sun behind light clouds
Only 19 degree above the horizont is the sun behind light clouds. At horizontal photovoltaic, this brings only double compared to yesterday noon under clouds.

blue sky
Sun behind
light clouds
Snowfall in March
March 14th 9:00 am. The Untersberg behind the houses is not visible because of dense stratus. Light snowfall. Nevertheless surprising much electric power compared to December.

Snowfall
in March
Sun instead of wood
One day after the news about the pellets shortage, measurements at 9 and 12 am. How much solar energy at this cloudy March 14th? Who is more secure.

Sun behind
clouds
12,2 V 12,2 V 12,3 V 12,3 V 12,2 V 12,5 V 11.1 V 12.2 V
10,5 V 13,5 V 16,1 V 17,2 V 15,3 V 19,8 V 19,7 V 20,1 V
0 mA 9,1 mA 34,5 mA 84,5 mA 26,8 mA 200 mA 168 mA 360 mA
0 W 0,555 W 2,221 W 5,197 W 1,635 W 12,500 W 9,324 W 21,96 W
0 % 0,55 % 2,12 % 5,20 % 1,64 % 12,5 % 9,32 % 22,0 %
22,1 V 22,3 V 23,1 V 23,9 V 24,0 V 25,6 V 26,0 V 25,3 V
32,6 mA 85,5 mA 124 mA 260 mA 104 mA 520 mA 420 mA 780 mA
0,795 W 2,076 W 3,050 W 6,396 W 2,538 W 13,000 W 9,324 W 19,03 W
1,17 % 3,07 % 4,49 % 9,41 % 3,73 % 19,1 % 13,7 % 28,0 %






























Photovoltaic - Electric power direct from light Photovoltaic - Electric power direct from light
Even a far north situated industrial nation like Germany could produce a big part of the needed energy by the roofs of the houses. Photovoltaic has much potential.



Context description:  dense cloud clouds cloudy different weather conditions condition yield photovoltaic pv test photovoltaictest pvtest tests photovoltaictests pvtests compare photovoltaiccompare pvcompare crystalline polycrystalline silicon vs against 3 three layer layers amorphous Uni Solar Unisolar
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