● Tighten the screws on copper bars or cables to the torque specied in this
document. Periodically conrm whether the screws are tightened, check for
rust, corrosion, or other foreign objects, and clean them up if any. Loose screw
connections will result in excessive voltage drops and batteries may catch re
when the current is high.
● When installing batteries, do not place installation tools, metal parts, or
sundries on the batteries. After the installation is complete, clean up the objects
on the batteries and the surrounding area.
● Do not connect two or more cables to the positive or negative power port of a
battery in parallel.
● Stay away from the equipment when preparing cables to prevent cable scraps
from entering the equipment. Cable scraps may cause sparks and result in
personal injury and equipment damage.
The cable colors shown in the electrical connection diagrams provided in this chapter are
for reference only. Select cables in accordance with local cable specications (green-and-
yellow cables are only used for PE).
6.1 Preparing Cables
Figure 6-1 Battery cable connections
(A) PV string
(B) DC switch (C) SUN2000
(D) AC switch (E) ACDU (F) Smart Power Sensor
(G) Power grid (H) LUNA2000 (M) FusionSolar app
LUNA2000-(5-30)-S0
User Manual 6 Electrical Connection
Issue 15 (2024-01-12) Copyright © Huawei Digital Power Technologies Co., Ltd. 78