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Based on that equation, I would think that the efficiency would go
to zero whenever there is not output from the PV panel (ie every
night). It is not entirely clear from the picture but are you basing
the efficiency on the integrated amount of energy produced by the
panel? If that is the case then the result would go to zero whenever
the integrator is reset. If an integrator is set to have a -1
integration period then it integrates monthly.<br>
kind regards,<br>
David<br>
<br>
<br>
<div class="moz-cite-prefix">On 04/06/2016 15:58, Sandeep Singh
Chahal wrote:<br>
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<p>Hello TRNSYS user, </p>
<p><br>
</p>
<p>I am analyzing the efficiency of photo-voltaic panel (type
194) for entire year. It goes to zero after each month which
should not be the case. ( check the attached file for results)
</p>
<p><br>
</p>
<p>Equation used for efficiency .... "(eta_system=
(E_electric/max(1,E_solar)) )"
</p>
<p><br>
</p>
<p>did anyone else had same issue... Any help will be greatly
appreciate thanks! <br>
</p>
<p><br>
</p>
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<div style="font-family: Tahoma; font-size: 13px;"> Thanks,
</div>
<div style="font-family: Tahoma; font-size: 13px;">Sandeep
Chahal </div>
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<br>
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<pre class="moz-signature" cols="72">--
***************************
David BRADLEY
Principal
Thermal Energy Systems Specialists, LLC
22 North Carroll Street - suite 370
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