Emerald Hot Water System for Home Assistant (Marketplace integration)

Installs: 62 sharing analytics
GitHub stars: 15
Connection: Uses the vendor's cloud
Upkeep: Updated in the last 6 months
Version: 1.1.8, October 21, 2026
Category: Climate, Water heaters
Kind: Marketplace integration
Needs: Needs the Marketplace (HACS on 2026.10 and older)
Domain: emeraldenergy
Source: github.com/ross-w/emerald-hws-ha
Issues: Report an issue

Independent directory, made by the developer of Vulpo. Not affiliated with Home Assistant or the Open Home Foundation.

About

Emerald Hot Water System is an integration that connects Emerald hot water heaters to Home Assistant through the vendor's cloud. It adds water heater entities and sensors, and it is configured in the UI with the Emerald account username and password. Options cover how long a connection is kept before reconnecting and the maximum time between data updates before the connection counts as unhealthy. An optional setting creates energy usage sensors that show cumulative kWh for the current day and reset at midnight, so they can be used in the Energy dashboard. Emerald only provides hourly energy data. If Emerald rejects the saved credentials, a notice appears in Settings under Repairs.

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Supports

Uses the vendor's cloud Needs an internet connection and an account with the vendor.
From the Marketplace Installed through the Marketplace, formerly HACS.
Actively maintained Its author released or pushed a change in the last six months.