BYD COMPANY LIMITED
Document
Installation Manual and User Manual for BYD
Project No.
\
Code
2M SOP0007540
Edition
13
Page
16 / 22
16
FIG. 14 Ground diagram
(4) All module frames should be grounded for safety. All materials
for grounding connections between modules must be approved by a
qualified electrician and also, the grounding itself must be done by a
qualified electrician. The ground wire should have at least the same
size as the electrical conductors(10-12 AWG exposed copper wire with
a minimum of 90°C is recommended).
(5)In order to avoid potential induced degradation
（
PID
）
,BYD
insists that the negative electrode of the inverter should be grounded.
CAUTION:
BYD modules provide the mounting holes, drain
holes and grounding holes. That has passed the safety testing.
Installers can’t drill and block
drain holes at
random.
3.3.2 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
20SQ045
45V
20A
