2 System Solution User Manual
8
Tab. 2-1 System Compositions
Item Description Remark
A Utility grid Grid earthing system types: TT, TN
B
SUNGROW single-phase
energy meter
Measures the export power and communicate
with the inverter via the RS485 port.
C Inverter SH5K.
D PV strings
Monocrystalline silicon, polycrystalline silicon,
and thin-film without grounding.
E Household load Devices that consume energy.
For the TT utility grid, the N line voltage to ground must be less than 30 V.
2.1.2 PV Energy Storage System (PV ESS)
With a battery module for the immediate storage of energy, the conventional PV
system can be upgraded to be a PV ESS.
* Refer to Tab. 2-1 for the descriptions of items A, B, C, D and E. The item F is a Li-ion
battery or a lead-acid battery.
Energy Management during Daytime
The energy management system (EMS) works in self-consumption by default. The
PV power will go to the house first, then the battery. Then if the battery is fully
charged the excess will go to the grid, the export power should not be more than
the limit value set in “10.7.3 Setting the Zero-export Function”.
If the PV power is less than the load power, the battery will discharge and provide
the energy shortfall. The inverter will draw power from the mains if the power from
the PV and battery is less than the load power.
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