10
2.6.2 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 in-
verter 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 ter-
minated. 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 10 ms. 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, vacuum cleaner, 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.
D
De
ec
clla
arra
attiio
on
n F
Fo
orr B
Ba
ac
ckk--U
Up
p O
Ovve
errllo
oa
ad
d P
Prro
otte
ec
cttiio
on
n
The inverter will restart in case of overload protection. The time required for restarting
will increase (10 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.
2.7
Retrofitting the Existing PV System
The hybrid inverter is compatible with any single-phase PV grid-connected inverters. An
existing PV system can be retrofitted to be a PV ESS with the addition of the hybrid
inverter.
The power generation from the existing PV inverter will be firstly provided to the loads
and then charge the battery. With the energy management function of the hybrid inver-
ter, the self-consumption of the new system will be greatly improved.
User Manual
