A

PV string

• A PV string is composed of the PV modules connected in series and works with an optimizer.
• The inverter supports the input from two PV strings.

Prepared by the customer

B

Smart PV optimizer

The supported Smart PV Optimizer models are SUN2000-(450W-P, 600W-P, 450W-P2) and MERC-600W-PA0^d.

Purchased from Huawei

C

DC switch

Recommended: a DC circuit breaker with a rated voltage greater than or equal to 600 V DC and a rated current of 20 A

Prepared by the customer

D

Battery

The inverter can connect to the LUNA2000.

Purchased from Huawei

The inverter can connect to LG-RESU batteries (LG RESU7H and RESU10H).

Prepared by the customer

E

Battery switch

Recommended: a DC circuit breaker with a rated voltage greater than or equal to 600 V DC and a rated current of 20 A

Prepared by the customer

F

Smart Dongle

Purchased from Huawei

G

Power meter^a

The inverter can connect to a YDS70-C16^b, DDSU666-H, DTSU666-H, DDSU71, DDSU1079-CT, DTSU71, or DHSU1079-CT^c power meter.

Purchased from Huawei

H

SUN2000

Select a proper model as required.

Purchased from Huawei

I

AC switch

To ensure that the inverter can be safely disconnected from the power grid when an exception occurs, connect an AC switch to the AC side of the inverter. Select an appropriate AC switch in accordance with local industry standards and regulations. Huawei recommends the following switch specifications:

A single-phase AC circuit breaker with a rated voltage greater than or equal to 250 V AC and a rated current of:

• 16 A (SUN2000-2KTL-L1)
• 25 A (SUN2000-3KTL-L1 and SUN2000-3.68KTL-L1)
• 32 A (SUN2000-4KTL-L1, SUN2000-4.6KTL-L1, SUN2000-5KTL-L1, and SUN2000-6KTL-L1)

Prepared by the customer

J

EMMA

An energy management device used in a residential PV system. The models are EMMA-A01 and EMMA-A02.

Purchased from Huawei

K

SmartGuard

The SmartGuard can be used to switch the inverter between on-grid and off-grid states. The models are SmartGuard-63A-S0 and SmartGuard-63A-AUS0.

Purchased from Huawei

• Note a: The Spanish version can use only the DDSU666-H power meter provided by Huawei. For details about how to operate a power meter, see DTSU666-H 100 A and 250 A Smart Power Sensor User Manual, DDSU666-H Smart Power Sensor User Manual, or YDS70-C16 Smart Power Sensor Quick Guide.
• Note b: SUN2000L V200R001C00SPC127 and later versions can connect to the YDS70-C16 meter.
• Note c: SUN2000L V200R001C00SPC137 and later versions can connect to the DDSU71, DDSU1079-CT, DTSU71, and DHSU1079-CT power meters.
• Note d:
  • The SUN2000-(450W-P, 600W-P, 450W-P2) and MERC-600W-PA0 cannot be used together for the same inverter.
  • If the MERC-600W-PA0 is selected, the optimizers must be configured for all PV modules.

1

DC input power cable

Common outdoor PV cable in the industry

• Conductor cross-sectional area: 4–6 mm²
• Cable outer diameter: 5.5–9 mm

Prepared by the customer

2

(Optional) Battery cable

Common outdoor PV cable in the industry

• Conductor cross-sectional area: 4–6 mm²
• Cable outer diameter: 5.5–9 mm

Prepared by the customer

3

(Optional) Signal cable

Outdoor shielded twisted pair cable

• Conductor cross-sectional area:
  • Combined crimping of cables on the port: 0.2–0.35 mm²
  • Crimping the cables on the port without combining them: 0.2–1 mm²
• Cable outer diameter:
  • 4-hole rubber plug: 4–8 mm
  • 2-hole rubber plug: 8–11 mm

Prepared by the customer

4

AC output power cable^a

• Not using the PE equipotential point at the AC output port: two-core (L and N) outdoor copper cable
• Using the PE equipotential point at the AC output port: three-core (L, N, and PE) outdoor copper cable

• Conductor cross-sectional area: 4–6 mm²
• Cable outer diameter: 10–21 mm

Prepared by the customer

5

PE cable

Single-core outdoor copper cable and M6 OT terminal

4–10 mm²

Prepared by the customer

Note a: The minimum cross-sectional area of the cable should be selected based on the rated value of the AC fuse.