AR
“The best energy meter for Home Assistant users — local API and contactor control enable automations no consumer monitor can match.”
Is the Shelly EM Gen3 Energy Meter worth it?
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
NM
Nicholas Miles · Editor-in-Chief & Methodology Owner
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
Updated 1 week ago“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
Shelly EM Gen3 Energy Meter vs. the alternatives
How the Shelly EM Gen3 Energy Meter stacks up against other Energy options on price, expert consensus, and our proprietary SHE Score.
| Product | Price | Consensus | SHE Score | Works With | Verdict |
|---|---|---|---|---|---|
| Shelly EM Gen3 Energy MeterThis page | $62 | 8.2/10 | 6.5/10 | major smart home platforms | Recommended |
| Emporia Vue 3 16-Circuit Monitor | $200 | 8.8/10 | 6.2/10 | major smart home platforms | Recommended |
| Eyedro Home Energy Monitor | $150 | 7.8/10 | 6/10 | major smart home platforms | Recommended |
| Emporia Vue 3 8-Circuit Monitor | $150 | 8.5/10 | 6.4/10 | major smart home platforms | Recommended |
The Shelly EM Gen3 Energy Meter ($62) earns a 8.2/10 expert consensus and a 6.5/10 SHE Score across 7 sources, versus the Kasa Smart Plug Power Strip HS300 at $40 (8.5/10 consensus).
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
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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
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Frequently Asked Questions
Is the Shelly EM Gen3 Energy Meter worth it?
The Shelly EM Gen3 Energy Meter earns a 8.2/10 consensus score across 7 expert sources and is rated "Recommended". At $62, it is best for Home Assistant users. Ars Technica notes: "The best energy meter for Home Assistant users — local API and contactor control enable automations no consumer monitor can match."
How much does the Shelly EM Gen3 Energy Meter cost?
The Shelly EM Gen3 Energy Meter is priced at $62. With a 8.2/10 score from 7 expert reviews and a "Recommended" rating, that price represents fair value relative to the ~7.5/10 average for Energy products. Prices shift often, so check the live figure before buying.
Who is the Shelly EM Gen3 Energy Meter best for?
The Shelly EM Gen3 Energy Meter is best for Home Assistant users, DIY smart home enthusiasts, Single-circuit monitoring. Experts rate it "Recommended" with a 8.2/10 consensus across 7 sources.
How does the Shelly EM Gen3 Energy Meter compare to other Energy options?
Among the Energy products we have aggregated, the Shelly EM Gen3 Energy Meter ranks above average with a 8.2/10 score. Tom's Guide adds: "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?
The Shelly EM Gen3 Energy Meter works with major smart home platforms. Check the compatibility notes above for any hub dependencies or setup requirements before you buy.
What are the best alternatives to the Shelly EM Gen3 Energy Meter?
If the Shelly EM Gen3 Energy Meter ($62, 8.2/10) is not the right fit, the closest alternatives in Energy are Emporia Vue 3 8-Circuit Monitor, Shelly Pro EM. Compare them on price, ecosystem support, and expert consensus to find your match.
What are the pros and cons of the Shelly EM Gen3 Energy Meter?
The main strengths 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 most-cited downside is single circuit per unit — monitoring 8 circuits costs $496. Overall, 7 expert sources rate it "Recommended" with a 8.2/10 consensus score.
Sources & Methodology
This review aggregates 7 independent expert reviews into a single consensus score. See how we build consensus scores and the SHE Score methodology.
Expert review sources cited on this page:
- Ars Technica
- Tom's Guide
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.