Battery Health Check - Huawei LUNA2000-5-S0 User Manual

LUNA2000-(5-30)-S0
User Manual
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Regardless of scenarios, the ESS must be charged within the maximum interval
corresponding to the SOC when the ESS is powered off. If the ESS is not charged
beyond the maximum interval, it may be damaged due to overdischarge.
Power-Off SOC Before Storage
SOC ≥ 5%
0% ≤ SOC < 5%

8.6 Battery Health Check

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Impact of Battery Health Check
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Issue 15 (2024-01-12)
The ESS cannot be charged due to incorrect configurations in the system.
The ESS cannot be charged due to no PV input and long-term mains failure.
NO TE
● When the SOC of the ESS decreases to 0%, charge the ESS within seven days. Any
permanent battery damage due to customer's failure to charge the ESS properly is not
covered under warranty.
● When the SOC of the ESS is low due to self-discharge loss or extended periods of
storage without being charged, the system forcibly charges the ESS to prevent damage
from overdischarge. Additionally, in situations where the PV power is insufficient, the
system will draw power from the power grid regardless of the Charge from AC
threshold.
To ensure safe and reliable operation of the ESS, the system checks the state
of health (SOH) of batteries. If the SOH decreases to the minimum threshold,
the ESS stops working and reports an alarm to avoid safety risks. During
battery operation, if the SOH calculation conditions are met, the SOH is
checked naturally. If the SOH calculation conditions are not met, the forced
check is required.
Natural check: During normal operation, when batteries are fully charged and
then discharge to about 5% to 10% state of charge (SOC) and the batteries
are not charged during the discharge, the SOH is checked during this process
naturally.
For example, in the maximum self-consumption mode, when the PV power is
greater than the load power, the batteries are fully charged to 100% SOC by
the surplus PV power. When the PV power is insufficient, the batteries
discharge to 5% SOC. The SOH is checked during this process naturally.
Forced check: The forced check is performed one year after the last SOH
check during normal operation or one month after the last SOH check near
the end of the battery service life.
Natural check: Natural checks are performed during normal operation and do
not affect the operating status of the ESS.
In different phases of Battery Health Check, the status is displayed as
Detection Request (Requesting calibration), Detecting... (Calibrating...),
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8 System Maintenance
Maximum Charge Interval
30 days
7 days
137