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Installation Manual for DualSun PV Modules
Voc Open circuit voltage of each module (refer to product label or data sheet)
Maximum number of parallel to 1
When modules are in series connection, the final voltage is sum of that of the single module.
When modules are in parallel connection, the final current is sum of the single module.
Modules with different electric performance models can not be connected in one series.
Serial connection
Parallel connection
Parallel connection after series connection
Figure 5:
Series connection and parallel connection circuit diagram
The number of modules in series connection in each strand shall be calculated as per requirements.
The open circuit voltage value under the expected lowest temperature shall not exceed the maximum
system voltage value stipulated for modules and other values required by DC electric parts.
Maximum series overcurrent protective device, where required.
If there is reverse current exceeding the maximum fuse current flowing through the module, use
overcurrent protection device with the same specifications to protect the module; if parallel
connection strands are more than 2, there shall be an overcurrent protection device on each strand
of module. See Figure 5.
Diode
Overcurrent protector
Connector
