Everything Solar Forum

Hi
I am looking for residential inverters < 5 kW that allow curve-based controls like Volt-VAR and Volt-Watt.  Doing research on comparing curve based control to preset automated response. Typically they use Modbus for communication but could be other methods. I had assumed that any inverter meeting CA state Sunspec certification had all these models (Models 120-127). But it seems that very few do. Does anyone have a list of small inverters that enable  this type of Sunspec control models?

Steve

------------------------------
Steven Hegedus
Professor and Senior Scientist
University of Delaware
Newark Delaware
ssh@udel.edu
------------------------------

Steven,

Thank you for your question! Our Division leaders may have some insights for you, @Nir Krakauer @John Burke?​​​

------------------------------
Carly Cipolla
Director of Operations
American Solar Energy Society
http://ases.org
------------------------------

Original Message:
Sent: Feb 18, 2021 08:33 PM
From: Steven Hegedus
Subject: smart inverter Sunspec models for curve based controls

Hi
I am looking for residential inverters < 5 kW that allow curve-based controls like Volt-VAR and Volt-Watt.  Doing research on comparing curve based control to preset automated response. Typically they use Modbus for communication but could be other methods. I had assumed that any inverter meeting CA state Sunspec certification had all these models (Models 120-127). But it seems that very few do. Does anyone have a list of small inverters that enable  this type of Sunspec control models?

Steve

------------------------------
Steven Hegedus
Professor and Senior Scientist
University of Delaware
Newark Delaware
ssh@udel.edu
------------------------------

Carly, Steven ... I am sorry, since I do not use an inverter that has 'curve-based controls' as mentioned ! ... I do use an inverter with 'true sine wave' for use with advanced operations ... such as computer, etc ! - Thank you

------------------------------
John Burke
Director, MESEA, Maine
Maine Solar Energy Association
dadsolar@yahoo.com
------------------------------

Original Message:
Sent: Mar 24, 2021 10:06 AM
From: Carly Cipolla
Subject: smart inverter Sunspec models for curve based controls

Steven,

Thank you for your question! Our Division leaders may have some insights for you, @Nir Krakauer @John Burke?​​​

------------------------------
Carly Cipolla
Director of Operations
American Solar Energy Society
http://ases.org

Original Message:
Sent: Feb 18, 2021 08:33 PM
From: Steven Hegedus
Subject: smart inverter Sunspec models for curve based controls

Hi
I am looking for residential inverters < 5 kW that allow curve-based controls like Volt-VAR and Volt-Watt.  Doing research on comparing curve based control to preset automated response. Typically they use Modbus for communication but could be other methods. I had assumed that any inverter meeting CA state Sunspec certification had all these models (Models 120-127). But it seems that very few do. Does anyone have a list of small inverters that enable  this type of Sunspec control models?

Steve

------------------------------
Steven Hegedus
Professor and Senior Scientist
University of Delaware
Newark Delaware
ssh@udel.edu
------------------------------

Thanks for replies. I determined that both inverters have the control functions available but they are not certified by Sunspec. I was able to access them eventually. This request is not longer active. Steve

------------------------------
Steven Hegedus
Professor and Senior Scientist
University of Delaware
Newark Delaware
ssh@udel.edu
------------------------------

Original Message:
Sent: Mar 24, 2021 10:20 AM
From: John Burke
Subject: smart inverter Sunspec models for curve based controls

Carly, Steven ... I am sorry, since I do not use an inverter that has 'curve-based controls' as mentioned ! ... I do use an inverter with 'true sine wave' for use with advanced operations ... such as computer, etc ! - Thank you

------------------------------
John Burke
Director, MESEA, Maine
Maine Solar Energy Association
dadsolar@yahoo.com

Original Message:
Sent: Mar 24, 2021 10:06 AM
From: Carly Cipolla
Subject: smart inverter Sunspec models for curve based controls

Steven,

Thank you for your question! Our Division leaders may have some insights for you, @Nir Krakauer @John Burke?​​​

------------------------------
Carly Cipolla
Director of Operations
American Solar Energy Society
http://ases.org

Original Message:
Sent: Feb 18, 2021 08:33 PM
From: Steven Hegedus
Subject: smart inverter Sunspec models for curve based controls

Hi
I am looking for residential inverters < 5 kW that allow curve-based controls like Volt-VAR and Volt-Watt.  Doing research on comparing curve based control to preset automated response. Typically they use Modbus for communication but could be other methods. I had assumed that any inverter meeting CA state Sunspec certification had all these models (Models 120-127). But it seems that very few do. Does anyone have a list of small inverters that enable  this type of Sunspec control models?

Steve

------------------------------
Steven Hegedus
Professor and Senior Scientist
University of Delaware
Newark Delaware
ssh@udel.edu
------------------------------