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6 Routing Maintenance
The engineering personnel who perform the following operations must have received professional training.
Before operating and maintaining the RESS, wear anti-static work clothes, anti-static gloves, and wrist straps, and
remove conductive objects such as jewelry and watches to avoid electric shock or burns.
All RESS internal maintenance work requires insulated tools and should be performed by personnel who have
received relevant training.
When operations such as installation and maintenance only involve the battery system, the output switch of the
high-voltage box should be kept open. When the inverter is involved, the DC input switch of the high-voltage box,
the output switch of the high-voltage box, the DC switch of the inverter, and the circuit breaker from the inverter
to the grid should be kept open.
6.1 Battery Storage
The recommended storage temperature is 15℃~35℃.
Battery performance degradation after long-term storage, please shorten shelf time as possible as
you can.
Recharge charge before using to recover capacity loss of self-discharge during storage and transport.
Storage battery should be at 40%-50%SOC when the battery is not used for a long time.
Storage batteries over 40°C or under 0°C will reduce battery life. A storage battery in a dry and low-
temperature, well-ventilated place.
If the battery is not used for a long time, the battery must be charged at regular intervals. The charging
requirements are as follows：
Table 13. Battery Charge Requirement in Storage Status
Storage Temp. Charge Period Charge Process
20℃~30℃
Each 6 months 1. Charge by 0.2C to 100% SOC
2. Discharge by 0.2C to 0% SOC
3. Charge by 0.2C to 40%~50% SOC
0℃~20℃ or 30℃~40℃
Each 3 months
6.2 Monthly Maintenance
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