What are the requirements for a Dura-i G3 install in parallel?
When setting up multiple Dura-i G3 inverters in parallel, there are a few considerations installers must make.
Power limitations
When installing inverters in parallel, all units must have the same power rating. For example, all connected inverters must be either 3.6kW, 4.6kW, 5kW, or 6kW models. Mixing different power ratings within the same parallel system is not supported and may result in performance issues or system faults.
Been installed on the same phase
All inverters connected in parallel must be installed on the same electrical phase. Parallel operation across different phases is not supported.
Note: The CT / Remote Energy Meter must be reading / powered from the same phase that the inverter is connected to.
Firmware should be the same across all inverters
All inverters connected in parallel must be running the same firmware version. Before commissioning the system, verify that each inverter is updated to the same firmware release to ensure proper communication, synchronisation, and system performance.
Note: You can check the firmware version by navigating to the overview page on the Dura-i app. Open the “Inverters” drop-down menu and ensure versions match on all inverters
Battery Independence
If connecting in ‘Battery Independence’ make sure the same number of batteries are linked to each inverter
As shown in Page 10 of the Parallel set up guide for Dura-I G3, each inverter has its own battery array to collectively charge and discharge (equal no. of batteries on all inverters)
Each inverter has an (inverter to battery) comms cable connecting the inverter to its own array of batteries
Note: For more information on battery independence, please see Page 10 of the Parallel set up guide for Dura-i G3
Battery Parallel
If connecting in ‘Battery Parallel’, make sure that this is a maximum of 5 batteries between a maximum of 2 inverters.
Page 11 of the Parallel set up guide for Dura-i G3 shows power cables are connecting both inverters to the array of batteries.
A comms cable is only required to the primary inverter; the subsequent “battery to battery” cables are used to pass information to the last battery in the array.
Note: For more information on battery parallel, please see Page 11 of the Parallel set up guide for Dura-i G3
Battery configuration selected correctly in the app
Before commissioning a parallel inverter system, the correct battery configuration must be selected in the app.
For most installations, this parallel setting should be set to “Battery Connect Independent” with up to nine inverters. - Figure 6 (p10 of the Parallel Set Up Guide For Dura-iG3). However, if the battery array is combined (this is only possible with two inverters) to both inverters as per Figure 7 (p11), then “Battery Connect Parallel” should be selected.
The same model of battery on each side with the correct model selected
The same battery model must be installed on each inverter in the parallel system. The correct battery model must also be selected within the app settings.
Wi-Fi Connection
Each inverter in the system will need to be connected to Wi-Fi individually before the commission process is started.
Dip Switches
On the underside of the Dura-i G3 engage the red dip switch for parallel mode by clicking it towards you, away from the wall (p13 of the Parallel Set Up Guide For Dura-iG3).