Common use of General Installation Clause in Contracts

General Installation. (1) The module was rated for use in the A application class which follows the items referred in IEC 61730-1.When the modules in a PV system are connected in series or parallel generally, we recommend simple methods of connecting them in series or parallel as shown below: Series connection of modules: Parallel connection of modules: (2) The bypass diode should have a Rated Average Forward Current at least 10A, and a Rated Repetitive Peak Reverse Voltage of at least 40V.The diode types are as below: Type Maximum DC Blocking Voltage Maximum Average Forward Current (3) The cable must not be bent or crushed on the direct exit of the cable screw joint include connecter and box. A minimum bending radius R≥4×cable diameter must be maintained. The cable must be routed in a way that tensile stress on the conductor or connections is prevented. The pictures are as below: Document Installation Manual and User Manual for BYD Project No. \ According to the system voltage (1500V) of the IEC standard. Under normal conditions, a PV module is likely to experience conditions that produce more current/voltage than reported at STC. Accordingly, Isc and Voc must be multiplied by 1.25 (for C-Si or non-C-Si) we recommend the maximum number of series connected modules for each module series as stated below: ≤25 BYDxxxMH-36/MHK-36 And the electrical characteristics are within +/- 10% of the indicated values of Isc, Voc, Pmax under STC. Additionally, there is an equation for calculating the modules amount in one string. It also depends on the system voltage and the lowest temperature in latest 40 years. The equation is below, N × Voc 1+ b ×(T − 25) ≤ Vsystem Here：N---means the module’s amount; Voc---means the module’s voltage under STC; β---means the voltage temperature coefficient; T---means the lowest environment temperature in latest 40 years; Vsystem---means the system voltage of the module. (4) For parallel connection, the current will be added up and the used connectors will be limited by the number of parallel connection. We recommended the maximum number of modules is 3. The fuse protection needs to be determined as well. (5) To prevent the cables and the connectors from overheating, the cross section of the cables and the capacity of the connectors must be selected to suit the maximum system short circuit current. Please note that the upper limit temperature of cable is 90°C and that of the connector is as follows: Document Installation Manual and User Manual for BYD Project No. \ Code 2M SOP0007540 Edition 13 Page 17 / 20 Connector Type The upper limit temperature PV-TS02（1500V） 100℃ PV-ZH202B（1500V） 100℃