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“The best energy meter for Home Assistant users — local API and contactor control enable automations no consumer monitor can match.”
The Shelly EM Gen3 Energy Meter ($62) is recommended with a 8.2/10 consensus score across 7 expert reviews. Experts highlight local api and mqtt — no cloud dependency and contactor control for circuit switching based on load. Ars Technica says: "The best energy meter for Home Assistant users — local API and contactor control..." Best for: Home Assistant users, DIY smart home enthusiasts, Single-circuit monitoring.
Recommended7 Expert Reviews
Shelly EM Gen3 Energy Meter
Energy Monitors
SHE ScoreAbove Average
SmartHomeExplorer proprietary rating
6.5/10
7 expert sources
Compatibility Breadth5/10
Setup Ease5.1/10
Reliability6.5/10
Value Rating9.2/10
Future-Proofing6.5/10
The Shelly EM Gen3 Energy Meter earns a SHE Score of 6.5/10, driven by strong value (9.2/10) with room to improve in compatibility breadth (5/10). Based on 7 expert sources and SmartHomeExplorer compatibility analysis.
How we calculate the SHE Score →Expert Consensus: 8.2/10 across 7 sources
Last verified:“The best energy meter for Home Assistant users — local API and contactor control enable automations no consumer monitor can match.”
Key Features
- ✓ Local API
- ✓ MQTT support
- ✓ Contactor control
- ✓ Home Assistant
Best For
Home Assistant usersDIY smart home enthusiastsSingle-circuit monitoring
What Experts Agree On
What Experts Love
- ✓ Local API and MQTT — no cloud dependency
- ✓ Contactor control for circuit switching based on load
- ✓ DIN-rail mount for professional panel installation
- ✓ Open ecosystem — works with Home Assistant and any platform
- ✓ $62 per circuit — add only the circuits you need
Common Criticisms
- ✗ Single circuit per unit — monitoring 8 circuits costs $496
- ✗ DIN-rail installation more complex than clip-on sensors
- ✗ No polished consumer app — designed for power users
- ✗ Requires electrical knowledge or electrician
What The Experts Say
TO
“The Shelly EM Gen3 is the choice for DIY smart home enthusiasts who want real automation control.”
Ready to buy the Shelly EM Gen3 Energy Meter?
Check Price on Amazon$62 · 7 expert sources · 8.2/10 consensus
Frequently Asked Questions
Is the Shelly EM Gen3 Energy Meter worth it?
Shelly EM Gen3 Energy Meter earns a 8.2/10 consensus score across our 12 expert sources. It is rated "Recommended" — Home Assistant users. At $62, The best energy meter for Home Assistant users — local API and contactor control enable automations no consumer monitor ...
Who is the Shelly EM Gen3 Energy Meter best for?
Shelly EM Gen3 Energy Meter is best for: Home Assistant users, DIY smart home enthusiasts, Single-circuit monitoring. Experts rate it "Recommended" overall.
How does the Shelly EM Gen3 Energy Meter compare to other Energy options?
Among the Energy products we have reviewed, Shelly EM Gen3 Energy Meter ranks above average with a 8.2/10 score. The Shelly EM Gen3 is the choice for DIY smart home enthusiasts who want real automation control.
What smart home systems does the Shelly EM Gen3 Energy Meter work with?
Shelly EM Gen3 Energy Meter works with major smart home platforms. Check our compatibility notes on the product page for any setup requirements or hub dependencies.
What are the pros and cons of the Shelly EM Gen3 Energy Meter?
The main pros of the Shelly EM Gen3 Energy Meter are local api and mqtt — no cloud dependency and contactor control for circuit switching based on load. The main downside is single circuit per unit — monitoring 8 circuits costs $496. Overall, experts rate it "Recommended" with a 8.2/10 consensus score.
Affiliate disclosure: SmartHomeExplorer.com participates in the Amazon Associates program. We earn a commission from qualifying purchases at no extra cost to you. This consensus review is based on 7 independent expert reviews — we did not test this product ourselves. Always verify current prices and availability before purchasing.