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Shelly 1PM Gen3
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Shelly 1PM Gen3

Bottom line

Worth considering

Its output is not a potential-free dry contact. Electrical ratings depend on supply and load type, and installation requires the protection and wiring specified in Shelly’s manual. Have a qualified installer check suitability for the intended circuit.

Best for

monitor a suitable circuit’s energy use; switch a supported load using local automation

Keep in mind

The local-first grade is not a promise of hardware lifespan; review the evidence below.

Local-first gradeClears every deal-breaker — based on local control, open integration, and cloud requirements.
A
No Cloud NeededThe described local functions do not need a vendor cloud service during normal operation. Controller, setup, and update requirements still apply.
+Local ControlA documented local path is available for supported functions. Setup, remote access, and other features may still need an account or internet connection.
+Open APIA documented interface or standard provides an integration path. Check the listing for supported functions, access requirements, and controller compatibility.

Researched from manufacturer documentation and published integration guides. A grade describes local control, open integration, and cloud dependence; it is not a guarantee of lifespan. How we evaluate

🎚️Relay⚡Energy

Added Mar 3, 2026

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Resources

Official ProductAPI DocsDocumentation

Key trade-offs

Why it stands out

Its output is not a potential-free dry contact. Electrical ratings depend on supply and load type, and installation requires the protection and wiring specified in Shelly’s manual. Have a qualified installer check suitability for the intended circuit.

What to weigh

Its output is not a potential-free dry contact. Electrical ratings depend on supply and load type, and installation requires the protection and wiring specified in Shelly’s manual.

About

Shelly 1PM Gen3 is a Wi-Fi relay with power monitoring and documented local API and MQTT integration.

Compatibility and limitations

Its output is not a potential-free dry contact. Electrical ratings depend on supply and load type, and installation requires the protection and wiring specified in Shelly’s manual. Have a qualified installer check suitability for the intended circuit. Metering can show usage trends, but we have not verified measurement accuracy or established that a change in readings diagnoses an appliance fault.

Research basis

This is a documentation-based overview. We have not independently tested this product or established its service life.

Specifications

Connection2.4 GHz Wi-Fi
FunctionsRelay switching and power monitoring
IntegrationDocumented API and MQTT

Frequently Asked Questions

Do not assume so. The outputs and wiring differ: Plus 1 has a potential-free contact, whereas 1PM Gen3 does not.

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Resources

Official ProductAPI DocsDocumentation

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