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2 Normally, the Back-Up switching time is less than 20 ms. However, some external fac-
tors or local regulations may cause the system to fail on Back-Up mode. Therefore, the
users must be aware of conditions and follow the instructions as below:
• Do not connect loads that are dependent on a stable energy supply for a reliable
operation.
• Do not connect the loads whose total capacity is greater than the maximum Back-Up
capacity.
• Do not connect the loads that may cause very high start-up current surges, such as non-
frequency conversion air conditioning, vacuum cleaner or half-wave loads such as hair
dryer, heat gun, hammer drill. Refer to "11.2 The Compatibility for Backup under Off-grid
Scenario" for recommended loads.
• Due to the condition of the battery itself, battery current might be limited by some factors,
including but not limited to the temperature and weather.
Declaration For Back-Up Overload Protection
The inverter will restart in case of overload protection. The time required for restarting will in-
crease (5 min at most) if overload protection repeats. Try to reduce Back-Up load power
within maximum limitation or remove the loads which may cause very high start-up current
surges.
2.6.3 Energy Management
The battery discharges to provide energy to loads. If the battery is empty or there is not
enough power from the battery system, the grid shall supply power to backup loads and nor-
mal loads.
When the grid is present, the bypass function of the hybrid inverter is activated and the
Backup loads will be directly connected to the grid via the bypass switch integrated in the
inverter.
If the Smart Energy Meter is abnormal or not equipped, the inverter will run normally, how-
ever, the battery can be charged but not allowed to discharge. In this case the feed-in power
setting will be ineffective, and the DO function for optimized mode will be disabled.
Energy Management during Daytime
The energy management system (EMS) works in self-consumption mode by default.
• Scenario 1: PV power generation ≥ Load power consumption
– First,PV power will go to Backup loads first, then normal loads and the battery.
– Moreover, If the battery is fully charged, the excess will go to the grid. The feed-in
power will not surpass the feed-in limitation value in initial settings.
• Scenario 2: PV power generation < Load power consumption
– First,battery will discharge and provide the energy missing.
– Moreover,inverter will draw power from the mains if the power from the PV and bat-
tery is less than the load power.
User Manual 2 Product Description
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