Solar Standard Test Conditions Question
Need help understanding this or else it is just wrong, am very confused, any help appreciated--- "By convention, solar cell efficiencies are measured under standard test conditions (STC) unless sta...
Forum Discussion
12thgenusa wrote:
No. AM of 1.5 is at a latitude of 41.81.
The calculation was for ZD at 48 so altitude was 42 whatever the latitude, date, or time of day.
For noon latitude to be 42N, and ZD 48 (to get that 1.5):
Lat = ZD -Dec so 42= 48-Dec so Dec must be 6N so sometime (three weeks?) after the 21 March Equinox.
(Dec runs from zero to 23 in three months so about 8 degrees a month change of tilt needed to be aimed at noon panel facing South)
