Delta RPI-H3

Questions and Answers:

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ramirezrichardAug 27, 2025
Why does my Delta Inverter display 'Grid Freq. Under Rating'?
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  David LewisAug 27, 2025
  The 'Grid Freq. Under Rating' error on your Delta Inverter can be caused by the actual utility frequency being below the UFR setting, an incorrect country or grid setting, or a detection circuit malfunction. You can resolve this by checking the utility frequency at the inverter terminal. Also, verify the country and grid settings. If the issue continues, check the detection circuit inside the inverter.
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Amanda MontoyaAug 27, 2025
What causes 'Grid Freq. Over Rating' error on my Delta RPI-H3 Inverter?
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  Connor McneilAug 27, 2025
  The 'Grid Freq. Over Rating' error on your Delta Inverter can be triggered by a few things: the actual utility frequency exceeding the OFR setting, an incorrect country setting, or a malfunction in the detection circuit. To troubleshoot, check the utility frequency at the inverter terminal. Also, verify the country setting. If the problem persists, inspect the detection circuit inside the inverter.
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Bobby NelsonAug 25, 2025
How to fix 'Grid Volt Over Rating' on a Delta RPI-H3 Inverter?
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  Heather PorterAug 26, 2025
  If your Delta Inverter is showing a 'Grid Volt Over Rating' error, it could be due to the actual utility voltage exceeding the OVR setting, the utility voltage surpassing the Slow OVR setting during operation, an incorrect country or grid setting, or a problem with the detection circuit. You should check the utility voltage at the inverter terminal. Also, verify the country and grid settings. If the issue remains, inspect the detection circuit inside the inverter.
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Jenny CardenasAug 25, 2025
Why does my Delta Inverter show 'Grid Volt Under Rating'?
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  Eric RandolphAug 25, 2025
  The 'Grid Volt Under Rating' error on your Delta Inverter can occur due to several reasons: the actual utility voltage being below the UVR setting, the utility voltage dropping below the Slow UVR setting during operation, an incorrect country or grid setting, or a detection circuit malfunction. To address this, check the utility voltage connection to the inverter terminal. Also, verify the country and grid settings. If the problem continues, have the detection circuit inside the inverter checked.

Delta RPI-H3 Specifications

General

Max. AC Power	3 kW
Number of MPPT Trackers	1
Cooling	Natural convection
AC Voltage Range	180 ~ 280 V
Communication	RS485, WiFi
Protection	DC reverse polarity
Operating Temperature Range	-25 ~ +60 °C