It need take the output power, open-circuit voltage, short-circuit current of PV modules array
into consideration when choose inverter type. And the minimum voltage of the module array
should be higher than the threshold voltage of inverters to guarantee the inverters proper
functioning.
5.3 Choose the appropriate rack
The load calculation should be charged by system designers and installers to make sure all
modules could bear predetermined load conditions. The choosing rack should pass all the
inspection and test by third party test institution which possessing static mechanics analysis
ability.
6 Modules Installation
6.1 Modules unpacking
6.1.1 When the modules are shipped to installation place, do not unpack modules in humid and
rainy weather.
6.1.2 After being unpacked, the modules shall be placed horizontally; the tilt, heap pressure,
leaning stack way are prohibited.
Figure 2 Modules stack illustration
6.1.3 Distance shall be kept between two batches of modules, no more than 23pcs modules shall
be piled up together (it is recommended that no more than 23pcs modules whose weight is less
than 27kg shall be piled up, and no more than 18pcs modules whose weight is no less than 27kg
shall be piled up).