Tenghui photovoltaic panel assembly drawing design

Is mechanical design of a PV array within the scope of this document?

Mechanical design of the PV array is not within the scope of this document. BRE digest 489 ‘Wind loads on roof-based Photovoltaic systems’, and BRE Digest 495 ‘Mechanical Installation of roof-mounted Photovoltaic systems’, give guidance in this area.

What is a roof mounted photovoltaic system guidance?

The guidance refers only to the mechanical installation of roof mounted integrated and stand-off photovoltaic systems; it provides best practice guidance on installation requirements and does not constitute fixing instructions.

Can PV modules be installed on a flat roof?

The installation of PV modules on flat roofs is an excellent choice, as the modules can be oriented in the best position, but distance of at least 1⁄2 of the height of the structure should be left between the rows of PV modules in order to avoid mutual shading. When installing PV modules on a flat roof, several aspects should be considered:

Can a roof be integrated with a PV system?

Building integrated PV (BIPV) modules, which can be integrated into the roof itself, might be considered for new construction or for an older roof in need of replacing. While BIPV products currently have a premium price, costs are expected to decrease. Will it be connected to the utility’s transmission grid?

How do you calculate the number of photovoltaic modules?

Multiplying the number of modules required per string (C10) by the number of strings in parallel (C11) determines the number of modules to be purchased. The rated module output in watts as stated by the manufacturer. Photovoltaic modules are usually priced in terms of the rated module output ($/watt).

What is the inspection and testing of PV array circuits?

The inspection and testing of d.c. circuits, particularly testing PV array circuits requires special considerations. Appendix C covers the inspection and testing of PV array circuits and documentation to be provided. PV array/string performance tests are recommended to verify performance as a check for faulty modules.