peak hours

[Wy_White_Wolf]

... Should I only focus on the info that I highlighted in red??

Depends on your system. Is this an off-grid system or a gridtied with net metering?

[epsgunner]

Thanks.. I'm at 30.69 lat. on my TX property (where panels will be) facing directly South.



As I figured.. Best summer is 15' angle for mid 7's radiance.. for 108-122 AC kw

Best overall is 26' angle.. (macslab was correct) 5-7.55 radiances..

Winter at 45' angle gets me mostly 6.XX's radiance..

[inetdog]

Entry into PV Watts

I'll ask the dumb question..

If my NAMEPLATE panel total is 725 (145*5) watts.. do I put .725 in the DC Rating (kW) entry??

Or do I put the total of 5 hours * 725 in that entry??

Since it asks for kW, rather than kWH, you put in just the .725 figure. The program will calculate the total power (based on sun hours for your location) that the panel will produce.

[epsgunner]

Try using PV Watts http://mapserve3.nrel.gov/PVWatts_Viewer/index.html

We all know this program.

I'll ask the dumb question..

If my NAMEPLATE panel total is 725 (145*5) watts.. do I put .725 in the DC Rating (kW) entry??

Or do I put the total of 5 hours * 725 in that entry??

[russ]

Try using PV Watts http://mapserve3.nrel.gov/PVWatts_Viewer/index.html

We all know this program.

[andrewc]

I'm not sure if it would be better if you simply created a single thread for all your concerns, as opposed to making a new thread with every question you come up with. But with that said...

The number that is most significant would be the one that corresponds to the tilt of your array. As you can see from the various tilt rows, these numbers change based on the angle of your panels. The first row (that you have with a red square around the last column) I believe is assuming a horizontal surface, or zero degree tilt. And I think it is using the worst months out of the 22 year sample period to give you a baseline minimum expectation.

Also, keep in mind that the chart is based on "an equator-pointed" surface, which I think means it is assuming a 180 degree azimuth (due south) in the Northern Hemisphere. In the real world, your array may not be able to be angled in that exact direction.

With that said, I'm not sure what you don't understand exactly, and what you are trying to accomplish. If you are more specific, I might be able to help out further. Also, PVWatts is a common online tool used for annual insolation and production estimation. via nrel.gov

[miike012]

I am having difficulty understanding the information. Maybe some one can help me.

This program calculates the peak hours for my location. Should I only focus on the info that I highlighted in red??