The system formed after adding an energy storage inverter to the photovoltaic power generation system is called Retrofit system. That means, there is not only PV inverter but also hybrid inverter in the transformed system, as shown in Figure below.
The following parameters must be set in the hybrid inverter:
1. set parameter 13-Rated power of other power generation systems.
2. set parameter 12-Dynamic feed limitation.
3. Set parameters 12-1 and 12-2 Maximum feed-in power and Maximum feed-in percentage.
Special attention:
1. If only the PV inverter and not the hybrid inverter is connected to the PV modules, parameter 11-Installed PV power must be set to 0.
2. The communication of the smart meter must be connected to the Hybrid inverter.
Attention when operating without PV modules on the hybrid inverter:
To prevent the battery from discharging completely in self-consumption mode, activate forced charging in the General parameter settings. Set the corresponding charging days and charging time here, as well as the charging target (SOC). These result from the requirements of the customer.
For further information, please download the user manual here.
This manual is intended for professional technicians who are responsible for installation, operation, maintenance and troubleshooting of inverters, and users who need to check inverter parameters. The inverter must only be installed by professional technicians.
The professional technician is required to meet the following requirements:
Know electronic, electrical wiring and mechanical expertise, and be familiar with electrical and mechanical schematics.
Have received professional training related to the installation, commissioning and troubleshooting of electrical equipment.
Be able to quickly respond to hazards or emergencies that occur during installation, commissioning and troubleshooting.
Be familiar with local standards and relevant safety regulations of electrical systems.
Read this manual thoroughly and understand the safety instructions related to operations.