Does anybody have a standard checklist or list of data points for commissioning a PV system?
Related, is it OK for a CxA to ask the PV sub to gather data for Cx purposes vs. doing it themselves?
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Tristan Roberts
RepresentativeVermont House of Representatives
LEEDuser Expert
11478 thumbs up
February 26, 2013 - 4:26 pm
Jared, I don't have a checklist. Let me know if you find one so that we can post it.Regarding data gathering, seems to me that it depends on the scope. Clearly you don't want the PV sub as the CxA on their own system, so the project CxA has to independently check the system.
Scott Bowman
LEED FellowIntegrated Design + Energy Advisors, LLC
LEEDuser Expert
519 thumbs up
March 8, 2013 - 8:51 am
What you test all depends on how the system is configured. We confirm the installation diagram and what protective devices are called for by the contract documents and the system shop drawing. Then we have the electrical contractor demonstrate that the meters or other measuring devices are reading correctly through independent measurement. If there is a connection to the DDC system, we confirm the reporting, and as you indicate, get a trend log of production for a week or two.
As to the validity of asking for trends, we do that all the time, and use data loggers where appropriate as an independent confirmation. Asking for trend logs as part of functional testing also sets up good tools for the owner going forward, as we choose the key performance indicators for those charts, which will be useful after we are done.