Shelly Plug US Gen4 White (US, 2-pack) review: fit and tradeoffs

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What does the white two-pack include?

The exact Shelly variant record identifies two white Plug US Gen4 units, model S4PL-00116US, EAN 3800238074302. The two plugs are installed and assessed independently; the package does not create one higher-capacity outlet.

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Does the two-pack provide a combined 30 A or 3,600 W allowance?

No. The 15 A / 1,800 W ceiling is per plug and explicitly for resistive loads. Do not add the two device ratings to justify a single appliance or circuit load.

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Will Apple Home show the same energy history as Shelly's app?

The manufacturer identifies Matter and Apple Home compatibility, and it separately documents power/energy metering. The checked product-specific sources do not establish that Apple Home shows Shelly Smart Control's energy history, so treat the Shelly app as the documented energy view.

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Assessment basis: this is the Shelly USA white 2-pack configuration of Plug US Gen4, model S4PL-00116US. Its storefront variant record assigns EAN 3800238074302. This is a research-based assessment; I have not used, installed or tested either unit. The EAN is an exact package identifier, not an Amazon ASIN.

Two devices, not one higher-rated outlet

The central distinction of the 2-pack is quantity. The official package image depicts two separate one-outlet plugs, and the corresponding page selects White / 2-pack. That makes this route relevant when two separate locations need control; it does not create a two-receptacle strip, a linked dual-outlet body or a shared 30 A / 3,600 W device. Each plug occupies its own wall outlet, each has its own radio and setup, and each keeps the individual electrical rating. Choose it only if two independent control points are useful and can physically fit the intended receptacles. Both devices use the S4PL-00116US base model. Shelly's official product material describes Wi-Fi, Bluetooth LE, Matter, Zigbee, energy metering and protective functions. The printed guide explains a key distinction that a multi-protocol headline can hide: the default firmware is the Matter route, and five rapid button presses switch to Zigbee firmware. The two modes are alternatives, not a promise that both remain active together. For an Apple Home household, the Matter path requires a compatible Matter controller and platform setup. The alternative Zigbee path requires a compatible coordinator. Check the chosen route before buying multiples; one device's setup does not automatically provision its partner.

Per-plug load limits and household planning

The manufacturer specifies 120 V and a 15 A / 1,800 W maximum output, with the wattage explicitly limited to resistive loads. Apply that limit separately to each plug and to the appliance connected to it. Do not add two device ratings to justify one high-load appliance, share the figure across a circuit, or assume that a motor, compressor or lighting driver is represented by the resistive rating. No horsepower maximum is established in the checked US materials. Use the appliance's own nameplate and instructions, and ask a qualified electrician about questions that depend on a branch circuit or wiring installation.

Schedules and power reporting

For each device, Shelly lists power/energy metering and up to 20 schedules. This can fit a household that wants separate lamp or appliance routines and a view of measured consumption in the Shelly app. The manufacturer materials do not publish an accuracy tolerance, so the readings should not be presented as a tested utility-bill substitute. Nor do the checked documents establish that a Matter app such as Apple Home shows the same energy history as Shelly Smart Control. Timer and Away Mode behavior were not established for this exact route; they should not be treated as included simply because schedules are present. The local web interface is documented for the same home network, while Shelly also describes local actions. That provides a useful already-configured LAN path if the external internet is unavailable, but it still depends on the home Wi-Fi/router and a device that remains powered. It is not a guarantee of remote access, offline first pairing or identical local control in third-party apps. With two plugs, plan each device's network placement and setup separately; do not assume the first pairing makes both visible.

Fit, spacing and the dimension discrepancy

The official product page lists the body as 1.50 × 2.52 × 2.01 inches (H × W × D). The printed guide gives 1.42 × 2.52 × 1.99 inches. Width agrees, but height and depth differ slightly, so only the shared 2.52-inch width is used for numeric finder matching. Measure both wallplates and the gap between adjacent devices. A wide body might cover the other receptacle or block access; cord and adapter clearance also matter. Four plugs in the broader family do not make this two-pack's physical footprint smaller or combine its electrical limits.

When this exact pack makes sense

This route is worth examining for two indoor grounded outlets where separate control, Shelly-app schedules and energy reporting are the intended workflow. Its value depends on genuinely needing two units; for one plug, the single route avoids surplus hardware. It is the wrong documented choice for outdoor exposure, a dimmable load, or a motor task where a specific horsepower limit is needed. Treat Matter, Zigbee and the manufacturer-listed voice integrations as distinct setup decisions, not universal feature guarantees. Before buying, match the white 2-pack name and EAN, confirm that both units are present, check the outlet geometry, compare each appliance's load type and limit, and verify the seller's current return terms. The exact-name CPSC SaferProducts query returned an empty list when checked on 2026-10-31, which is only a narrow name search and not a product-safety verdict. This review does not claim ownership, testing, measured savings, meter accuracy or customer sentiment.

Key specifications

Key details at a glance

Controlled outlets	Single plug multi unit package
Reviewed package	Two white plugs; exact storefront variant is White / 2-pack.
Maximum current	15 A
Maximum published watts at 120 V	1800 W
Motor limit	The checked US materials do not publish a horsepower limit. The 15 A / 1,800 W maximum output is explicitly for resistive loads only and applies to each plug separately.
Body width	2.52 in
Network and protocol	The default firmware is the Wi-Fi/Matter route. Five rapid button presses switch the device to Zigbee firmware; Matter and Zigbee are alternative firmware modes, not simultaneous control modes. The checked materials describe 2.4 GHz Wi-Fi, Bluetooth LE and a built-in local web interface.
Indoor use only	Yes
Outdoor rating	No
Schedules documented	Yes
Countdown timer / auto-off	Yes
Matter controller for third-party app	Yes

Use the exact model’s instructions for operating limits, supplied equipment and version differences.

Sources for this review

Sources for this assessment

Check the exact version against your own outlet

The finder checks documented ratings and features; it cannot approve your appliance, outlet wiring or physical clearance.

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