Shelly 1PM Gen3

Description

The Shelly 1PM Gen3 is the “heavy-duty” power monitoring specialist. It takes everything great about the Shelly 1PM Mini Gen3 and scales it up for serious power handling and more flexible wiring.

If the Mini is an Oreo, the 1PM Gen3 is the full-sized professional model. It is designed to sit behind a power outlet or inside an electrical panel to manage and monitor high-draw appliances.

Why choose the “Full-Size” 1PM over the Mini?

The “PM” still stands for Power Monitoring, but the full-size Gen3 version offers two massive advantages:

• Massive Power Capacity: While the Mini is capped at 8A, the standard 1PM Gen3 can handle up to 16A. This is the difference between controlling a few LED bulbs (Mini) and controlling a large space heater, a washing machine, or a high-end gaming PC (Full-size).
• DC Powering: Unlike the Mini (AC only), the 1PM Gen3 can be powered by 24-48V DC, making it useful for specialized low-voltage power monitoring setups (though the output will still match the input).

Technical Comparison

Here is how the 1PM Gen3 stacks up against the Mini version:

Feature	Shelly 1PM Mini Gen3	Shelly 1PM Gen3 (Full Size)
Max Current	8A (~1840W at 230V)	16A (~3680W at 230V)
Power Supply	110-240V AC	24-48V DC
Power Measurement	Yes	Yes (High Accuracy)
Size	29 x 34 x 16 mm	37 x 42 x 16 mm
Overheating Prot.	Yes	Yes

Key “Gen3” Features

Since this is part of the latest generation, it includes the same premium internals as the rest of the line:

• Matter-Ready: Designed to integrate into the Apple/Google/Amazon ecosystems via the new universal standard.
• Knockout Performance: The ESP-Shelly-C38F chip ensures your automations trigger instantly without lag.
• Advanced Safety: It includes internal temperature sensors to shut down if it gets too hot, as well as overvoltage and overcurrent protection.

Best Use Cases for the 1PM Gen3

This is the “workhorse” of the Shelly lineup. You would use this for:

• The “Energy Hog” Hunt: Put it behind your refrigerator, dishwasher, or washing machine to see exactly how much they cost you per month.
• Safety Automations: Set a rule that if the iron or a space heater has been drawing more than 100W for over 2 hours, it automatically shuts off.
• Smart Sockets: Turn a “dumb” wall outlet into a smart one that can handle any standard household appliance without blowing the relay.

A Critical Reminder

Just like the Mini PM, the Shelly 1PM Gen3 does NOT have dry contacts. The output (O) will always be the same voltage as the input (L). If you need to switch a garage door or a different voltage circuit, you must go back to the standard Shelly 1 Gen3.

Note: Whilst the Shelly configuration is mostly DIY, any electrical work must be done by a registered electrical contractor and we recommend Straton Electrical.