Easun IGrid SS 3KW Plus, Service Manual, Page: 15 / 29

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5. Function explanations for each PCB
Table 5.1 PCB information of InfiniSolar 3KW
Item PCB Name PCB serial number Quantity
1 CNTL 71-500083-XXG 1
2 MAIN 71-500086-XXG 1
3 BAT 71-600021-XXG 1
4 COM 71-000072-XXG 1
5 PANEL 12-400030-XXG 1
6 CHG CNTL 71-000074-XXG 1
7 DISCHG CNTL 71-000076-XXG 1
8 SPS 71-500007-XXG 1
Note: “XX” in the serial number is the version of the PCB. It may be modified according to
releasing version in the future.
5.1 MAIN board
Figure 5.1 picture of MAIN board
The MAIN board consists of inverter circuit, Boost circuit, relay blocks, BUS capacitors,
detection circuit and some other filter inductors and capacitors. Although the input of the
MAIN board is unstable DC, the output is relatively stable. And the Boost circuit will trace
the MPP.
BUS capacitor
BOOST chock
SPS
Common chock Inverter chock