Terminal Description
The solar inverter has 20 DC input terminals. DC SWITCH 1 controls PV1–PV8
(MPPT1–MPPT4), DC SWITCH 2 controls PV9–PV14 (MPPT5–MPPT7), and DC
SWITCH 3 controls PV15–PV20 (MPPT8–MPPT10).
Figure 5-20 DC terminals
When the DC input is not fully congured, the DC input terminals must meet the
following requirements:
1. Evenly distribute the DC input power cables on the DC input terminals
controlled by the three DC switches. DC SWITCH 1 is preferred.
2. Maximize the number of connected MPPT circuits.
For example, if the number of input routes is 1–19, the DC input terminals are
selected as follows.
Number
of PV
Strings
Terminal Selection Number
of PV
Strings
Terminal Selection
1 Any even-numbered route 2 PV2 and PV10
3 PV2, PV10, and PV18 4 PV2, PV6, PV10, and PV18
5 PV2, PV6, PV10, PV14, and
PV18
6 PV2, PV4, PV6, PV10, PV14,
and PV18
7 PV2, PV4, PV6, PV10, PV14,
PV18, and PV20
8 PV2, PV4, PV6, PV8, PV10,
PV14, PV18, and PV20
9 PV2, PV4, PV6, PV8, PV10,
PV14, PV16, PV18, and
PV20
10 PV2, PV4, PV6, PV8, PV10,
PV12, PV14, PV16, PV18,
and PV20
11 PV1, PV2, PV4, PV6, PV8,
PV10, PV12, PV14, PV16,
PV18, and PV20
12 PV1, PV2, PV4, PV6, PV8,
PV10, PV12, PV14, PV16,
and PV18–PV20
13 PV1–PV4, PV6, PV8, PV10,
PV12, PV14, PV16, and
PV18–PV20
14 PV1–PV4, PV6, PV8, PV10,
PV12, PV14, and PV16–
PV20
15 PV1–PV6, PV8, PV10, PV12,
PV14, and PV16–PV20
16 PV1–PV6, PV8, PV10, PV12,
and PV14–PV20
SUN2000-(100KTL, 110KTL, 125KTL) Series
User Manual 5 Electrical Connections
Issue 07 (2020-09-15) Copyright © Huawei Technologies Co., Ltd. 61
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