User Manual
13
No current
With current
STB5K-20
SH5K-20
Emergency
appliance
SBP4K8
Home
appliance
Fig. 2-7
Inverter Application in an Off-grid System
Declaration for Back-Up Function
The following statement involves SUNGROW general policies about the hybrid
inverters described in this document.
1.
For hybrid inverters, the electrical installation typically includes
connection of the inverter to both PV modules and batteries. If there is no
available power from batteries or PV modules in backup mode, the
backup power supply will be automatically terminated. SUNGROW shall
hold no liability for any consequences arising from failing to observe this
instruction.
2.
Normally, the Back-Up switching time is less than 3s. However, some
external factors 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 air-conditioner, high-power pump, and hair drier.
−
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 increase (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 startup current surges.
