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In an on-grid parallel system, the master inverter collects information from Smart Energy
Meter and slave inverter and performs the energy management including:
• Feed-in power control.
• Battery charge / discharge
• Maximum power limitation
The following settings are required for the inverter parallel function.
• Feed-in power control. The feed-in power control function refers to "8.5.1 Feed-in Limita-
tion". The PV installation power of the master inverter is the total installation power of the
system, the slave inverters do not need to set the feed-in power.
• Ripple Control. The Ripple Control device only needs to be connected to the master in-
verter, which will perform unified scheduling. Refer to "6.8.2.4 DRM Connection" for the
cable connection. Refer to "8.10.6 Active Power Regulation" to enable it in the iSolar-
Cloud App.
• Parallel Configuration. Refer to "8.10.14 Parallel Configuration" to configure the master
and slave inverters in the iSolarCloud App.
2.7 Retrofitting the Existing PV System
The hybrid inverter is compatible with any three-phase PV grid-connected inverters. An ex-
isting PV system can be retrofitted to be a PV ESS with the addition of the hybrid inverter.
On-grid Port to Retrofit the Existing PV System
figure 2-6 On-grid Port to Retrofit the Existing PV System
The AC terminal of the PV inverter and the GRID terminal of the hybrid inverter are con-
nected in parallel.
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 inverter, the
self-consumption of the new system will be greatly improved.
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