DER Telemetry for Utility Interconnection

ASE / Kalkitech DER Telemetry Gateway and DER Aggregator helps residential, commercial and utility scale DER’s to connect to Utility DERMS, ADMS and SCADA systems and complies with Interconnection rules and Grid codes.

The DER Telemetry Gateway is deployed where the Interconnection requirement needs the DER site to have direct connection with the Utility DERMS, ADMS and SCADA server over DNP3 or IEEE 2030.5 or IEC 60870-5-104. We provide residential, commercial and utility scale Telemetry Gateways, ruggedized and with strong cybersecurity features.

The DER Telemetry Aggregator is deployed where the Interconnection requirement allows for or utility requires an Aggregated telemetry pathway to connect to Utility DERMS, ADMS and SCADA. Aggregators reduce cyber security risk for the utility and could be cost efficient. We provide Kalki.IO Public Cloud DER Aggregator with direct connections to many Utilities and Fleet Aggregators, that allow OEM’s to build and deploy their own DER Aggregators for Utility Interconnection.

Our products support California Rule 21 with CSIP Profile and CSIP-Aus Profile for Australian interconnection requirements.


Regulatory requirements such as California Rule 21 or the CSIP-Aus mandates require certain set of DER’s to be connected to Utility DERMS, ADMS or SCADA Servers, for monitoring and control to ensure safety and reliability of the grid. While IEEE 1547-2018 specifies IEEE 2030.5, DNP3 and Modbus as the three approved protocols at the Local Interface for DER’s, the utility interconnection typically uses DNP3 or IEEE 2030.5. DNP3 is ideal for real-time control of a small number of very large MW DER generators, IEEE 2030.5 is the preferred protocol for interconnection, monitoring and control, given its security profile, ability to scale to millions of nodes, model support, support for web technology support over HTTP, its ability to support scheduling and its ability to model DER’s in multiple ways including aggregator, proxy, direct client etc., IEEE 2030.5 allows for profile support like CSIP and CSIP-Aus, that enable a subset of protocol features that align with specific jurisdictional use cases to be implemented and certified.

ASE / Kalkitech DER products based on Kalki.IO DataHub OT middleware, are scalable and secure products with support for more than 80+ protocols, with proven integration with AWS, Azure and with a connector and REST/API interfaces for enterprise integration or cloud integration.

DER Telemetry Interconnection Options

  • Direct to Utility ADMS / DERMS / SCADA Directly
  • DNP3 or IEEE 2030.5 Support.
  • Cybersecurity hardened including TPM2.0, Secure Boot, In-built firewall
  • Remote Management, Firmware & Software Updates and Remote Commissioning.
  • Supports different models of hardware and software depending upon DER size and Site requirements
  • Real Time Automation Controller Support
  • NEMA 4 Enclosure with Universal Power supply & Extended Input range option
  • Comprehensive 4G / LTE Cellular Subscription Included with support for AT&T, Verizon, T-Mobile in US
  • SunSpec / Kiryo Certificate, Utility PKI and 3rd Party PKI Support to connect with utility
  • Configuration, Engineering & Site support
  • Access to Management portal for upgrade and maintenance
  • Secure Remote access of behind the gateway devices

  • DER Aggregator Platform for Utility Interconnection and Fleet Aggregation
  • Interconnects to Utility DERMS, SCADA and ADMS systems over DNP3, IEEE 2030.5 of IEC 60870-5-104 or REST/API
  • Support communication with DERs directly at site on over 80+ protocols or connect to DER Fleet Softwares over Web services or REST/API or custom interfaces
  • Configuration, Engineering & Site support
  • Access to Management portal for upgrade and maintenance
  • Secure Remote access of behind the gateway devices
  • Market/ISO/Utility DR program integration
  • Utility Integration Validated- PG&E, SAPN

  • Complies with CA Rule 21 Customer Owned Telemetry requirements for PG&E and SCE
  • Approved for Interconnection of DER’s to PG&E SCADA, ADMS and DERMS for Customer Owned Telemetry Program, with both Direct Connected DER and Aggregator Connected DER Interconnection
  • Complies with SCE Advise Letter 5032-E and Advise Letter 5032-E-A for Customer Owned Telemetry requirements
  • Configuration, Engineering & Site support
  • Access to Management portal for upgrade and maintenance
  • Secure Remote access of behind the gateway devices
  • Market/ISO/Utility DR program integration

  • Complies with CSIP Australia requirements
  • Approved for Interconnection of DER’s to SAPN with Aggregator Connected DER Interconnection
  • Configuration, Engineering & Site support
  • Access to Management portal for upgrade and maintenance
  • Secure Remote access of behind the gateway devices
  • Market/ISO/Utility DR program integration

Key Solution Features

  • CSIP certified IEEE 2030.5 DER Gateway and Aggregator used for utility integration
  • Field device integration supported over -SunSpec Modbus 100 series & 700 series, DNP3.0, IEC61850, IEC60870-104
  • OPC UA, MQTT, DLMS, ANSI, SNMP protocols are available on request
  • Multiple hardware options for different DER capacity

  • Device is secured from the ground up including OS, kernel and applications software, user permissions, firewalls
  • All software releases and patches are signed using manufacture specific PKI trust chains
  • Rule 21 PKI infrastructure approved by utility/regulator for IEEE2030.5 connection with utility DER Headend Server
  • SSL/ TLS 1.2 for IEEE2030.5 PKI, IEC 62351-3 for all TCP communication, IEC 62351-5
    (DNP3 secure authentication)
  • Role-based remote maintenance & management by ASE Systems PKI infrastructure
  • Zero trust remote device access for field equipment maintenance and updates
  • TPM2.0 with Secure Boot & Hardened Linux available for specific product variant (see datasheet)

  • Access to Management Portal, for Upgrade & Maintenance
  • Packaged with fixed IP SIM Card with Monthly subscription for cellular Data *
  • NEMA 4 Enclosure with wall mounting option
  • Universal Power Supply (85 ~ 264VAC) & High Voltage Power Supply (180~550VAC)
  • Enhanced Edge based programming using IEC 61131-3 is available on request*

  • IEEE 1547.1 Protocols – IEEE 2030.5, DNP3, Modbus and IEC61850
  • Utility Connectivity IEEE2030.5, DNP3.0, IEC60870-5-101/104
  • CSIP US and CSIP Australia support
  • Cloud Connectivity – Data Hub, AWS, Azure
  • Other Protocol Interfaces – MQTT, OPC UA, SNMP
  • Serial and Ethernet interface for DER integration

  • DataHub is a data middleware for DER data that enables field data to be routed to multiple enterprise applications
  • Supports Integration with Utility and Cloud systems
  • Supports Web Services, REST/API for 3rd Party Integration
  • Cloud Connectivity – Data Hub, AWS, Azure
  • Other Protocol Interfaces – MQTT, OPC UA, MQ, Kafka

Utility Interconnection using Aggregator

Direct Utility Interconnection using DER Gateway

Monitoring and Management

  • Centralized management and configuration portal
  • Monitor Gateway Healthiness
  • Monitor IEEE2030.5 & DER Device communication status
  • Device specific or fleet wide dashboards
  • Secure Role based Remote access of field devices
  • Pre-configure Gateway with DER device configuration as premium support


Software Security

  • Manufacture specific dedicated PKI trust chain (called TC1) for signing artifacts like software & patches
  • Device management Private PKI Infrastructure for Role based access control for device management & maintenance
  • Rule 21 PKI Infrastructure approved by utility/CPUC used for IEEE2030.5 connection

Hardware Security

  • Secure Boot & Hardened Linux *
  • Application Sandboxing *
  • Firewall & Access control
  • Firmware Signing & integrity check
  • TPM for secure boot and key storage *
*Product variant specific (see datasheet)

CSIP Compliance

Read More

ASE’s Telemetry Gateways can communicate with the DER devices on-site, e.g., smart inverter or Energy Management System (EMS) using any of the communication interfaces defined in IEEE 1547-2018 (Modbus, DNP3, and IEEE 2030.5). Common Smart Inverter Profile (CSIP) certified IEEE 2030.5 client and aggregator client support in the gateway helps the utility to monitor and control any DER locations regardless of the communication capability of the field devices, thereby reducing overall interconnection costs.

Control Management

IEEE2030.5 client can be configured on three modes, fully interpreted, partially interpreted and no- interpretation for handing the DER controls. On no-interpretation mode aggregator shall rely on the controls directly to the DER devices or downstream gateways and let the DER device/gateway handle the control prioritization, scheduling primacy and default control handling. In Partial interpretation mode, aggregator client passes the scheduling and default control to downstream and handle the control primacy and prioritization at the aggregator side. In fully interpretation mode aggregator client does all the handling of DER control including scheduling primacy, default control handing. Full interpretation would be required for devices which are connected on telemetry protocols like DNP3.0 or SunSpec directly from field.

Logic programming

COT support logic engine based on basic logic module and IEC61131 based logic programming. Logic engine can be configured to prioratize dispatch commands based on inputs from Market, ISO and utility requirement. Logics can be used implement local decision loops like command interlock. Configuration utility provide flexbile user interface to configure the logic based on structured text, functional block, or ladder logics as required for the technician.

Limited generation profile (LGP) can be enabled in the COT for annual /monthly/biweeky/weekly dispatch schdule.

Industry Compliance


California Smart Inverter Profile (CSIP) is a set of technical requirements and communication protocols developed by the California Public Utilities Commission (CPUC) for smart inverters installed in solar photovoltaic (PV) systems. CSIP aims to enhance the reliability and stability of the electrical grid by enabling better integration of solar power. By complying with CSIP, COT gateway and aggregator ensures seamless communication between the smart inverter and the utility grid, enabling advanced functionalities such as voltage and frequency regulation, grid support during disturbances, and remote monitoring and control.


CSIP AUS (California Smart Inverter Profile Australian) is an extension of the CSIP standards specifically tailored for utility-scale solar PV systems in Australia. CSIP AUS incorporates additional requirements and specifications necessary for the Australian grid infrastructure and regulatory framework. COT products serves as a comprehensive solution, functioning as a product support aggregator and gateway that adheres to CSIP AUS.

PV system owners, developers and operators in California and Australia can benefit from improved grid integration, optimized performance, and enhanced overall system reliability.

Centralized Management

COT gateways come with comprehensive device management service through ASE/Kalkitech’s device management solution. provides a secure centralized device management service what can be used to update gateway firmware, security patches, license, and configuration files remotely. It can used as central repository for configuration, settings and logs retrieved from the field gateways. can also be useful for continuous monitoring of events and alarms from the gateway and helps user to take necessary actions on time thereby minimizing downtime and truck rolls.

Secure Remote Access

Kalkitech remote device maintenance access service provides a role-based remote configuration and management access for field devices such as inverters, DER controllers, storage controllers, or meters by extending connectivity from the programming port of the field device with the engineering and configuration tool situated at a remote location over a public/ private network on a secured link.


CA Rule 21 DER Gateway Brochure

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