FullMoonSolar
New Member
- Joined
- May 22, 2022
- Messages
- 13
Hello All,
We have helped friends install several XWPro systems in the past but this is the first dual (Primary/Secondary) system that we have operating.
The system is wired according to the installation manuals and AC and DC wiring has been checked several times. The supply wire is larger than the recommended (2awg thhn/thwn vs 6awg). The system is setup as a residential backup power source in a hurricane zone. It is a 240v split phase AC system with a 48v LFP Battery bank with Schneider BMS. There is no MPPT.
The good:
Both inverters work as advertised when in stand-alone or Operating/Standby modes.... AC passthrough, DC Charging, and Backup. There isn't any issue with any of these regardless of which Inverter/Charger is in Operating and which is in Standby.
The bad:
The issue only occurs when we enable Operating/Operating mode. As you may know, there is a 9 second delay after the 2nd unit Operating mode is Enabled. The instant the relays pull in on the switched Inverter/Charger, the line voltage separates by 8 to 12 volts. The XWPro dual system switches to Invert mode almost immediately and begins the qualification check. It qualifies AC as expected and switches back to AC-passthrough where it immediately detects the line voltage split again - then back to DC/Qualification/Transfer to Passthrough. The cycle continues.
Both Inverter/Chargers are set, and confirmed, to be Grid Code IEEE-1547-2003. The local power company requires the same.
We have talked to Schneider Tech support and Schneider Engineering but we don't have any recommendations. We have documented many voltage measurements in all states and taken video of the Insite Home screens but they seem not to be of any help to identify the cause.
As a result, we have been operating in Operating/Standby mode for the past 6 months. We alternate Inverter 1/2 in Operating mode each month.
We have no idea what to check next. We think our options are to take the system out and install something else, or setup a second independent backup load panel.
Does anyone have experience with Schneider dual XWPros? Any ideas?
We will track down any recommendation. Thank you for your support.
We have helped friends install several XWPro systems in the past but this is the first dual (Primary/Secondary) system that we have operating.
The system is wired according to the installation manuals and AC and DC wiring has been checked several times. The supply wire is larger than the recommended (2awg thhn/thwn vs 6awg). The system is setup as a residential backup power source in a hurricane zone. It is a 240v split phase AC system with a 48v LFP Battery bank with Schneider BMS. There is no MPPT.
The good:
Both inverters work as advertised when in stand-alone or Operating/Standby modes.... AC passthrough, DC Charging, and Backup. There isn't any issue with any of these regardless of which Inverter/Charger is in Operating and which is in Standby.
The bad:
The issue only occurs when we enable Operating/Operating mode. As you may know, there is a 9 second delay after the 2nd unit Operating mode is Enabled. The instant the relays pull in on the switched Inverter/Charger, the line voltage separates by 8 to 12 volts. The XWPro dual system switches to Invert mode almost immediately and begins the qualification check. It qualifies AC as expected and switches back to AC-passthrough where it immediately detects the line voltage split again - then back to DC/Qualification/Transfer to Passthrough. The cycle continues.
Both Inverter/Chargers are set, and confirmed, to be Grid Code IEEE-1547-2003. The local power company requires the same.
We have talked to Schneider Tech support and Schneider Engineering but we don't have any recommendations. We have documented many voltage measurements in all states and taken video of the Insite Home screens but they seem not to be of any help to identify the cause.
As a result, we have been operating in Operating/Standby mode for the past 6 months. We alternate Inverter 1/2 in Operating mode each month.
We have no idea what to check next. We think our options are to take the system out and install something else, or setup a second independent backup load panel.
Does anyone have experience with Schneider dual XWPros? Any ideas?
We will track down any recommendation. Thank you for your support.