This article explains how AWS IoT services enable utilities to control distributed energy resources (DERs) like thermostats and heat pumps at scale for grid stability and demand-response programs.

• DERs are controllable energy assets that help reduce grid strain and carbon emissions
• AWS IoT Greengrass enables edge logic and device protocol management like Modbus
• AWS IoT Device Management registers, organizes, and searches devices by properties
• AWS IoT Core provides secure X.509 certificate-based device authentication and authorization
• AWS IoT Device Shadow synchronizes device state between cloud and edge automatically
• AWS IoT Device Defender monitors security risks across IoT device fleets
• Manual user changes detected locally and propagated via shadow state transitions
• Solution handles offline devices with pending commands until reconnection

AWS IoT provides ready-to-use components and security features that reduce development time and operational complexity for controlling distributed energy resources reliably at scale.