imported>WikiSysop at 16:39, 24 January 2012

2012-01-24T16:39:58Z

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[[:en:{{PAGENAME}}]]

[[:de:Watt Peak]]

Or [[nominal peak power]]

The nominal peak power is the power rating given by the manufacurer of the module or system.

==Power==

Ppk= A*effnom

In other words, if Ppk is the nominal peak power and A the area of the module(s), we have
Ppk= A*effnom (1)

The actual power depends on the [[irradiance]] G and the real module efficiency eff which is a function of [[irradiance]] and module temperature [[Tm]] (and sometimes more things which we will forget about here). So you have the actual power:

P = [[G]]/1000 * A*eff(G,Tm) = G/1000*A*effnom * effrel(G,Tm) (2)

where we have written the actual efficiency as the product of the [[nominal efficiency]] effnom and the [[relative efficiency]] effrel(G,Tm).

Combining Eq. 1 and 2 you get:
P = G/1000 * Ppk * effrel(G,Tm) (3)

Therefore, if you know the relative efficiency and the peak power, you don't need to know the nominal efficiency or the area.

BUT: if you want to know either the nominal efficiency OR the area, you will need to know the other of the two parameters. If you know the nominal efficiency and the peak power, you can calculate the area using Eq. 1:
A = Ppk/effnom (4)

So we don't actually have a nominal efficiency in the program. That would be useful only to tell the user how much area his/her system would use.

[[Symbol::Wp]]

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[[Cost-per-watt]]

Watt-peak - Revision history

imported>WikiSysop at 16:39, 24 January 2012