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Last updated June 2026

Eufy Cam S4

4.2
399 ratings
Launch Year: 2025

Model: T8172

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Our review

Eufy Cam S4 Review: The Dual-Lens Solar Camera That Tracks and Zooms With No Monthly Fee

Sharp 4K video, a clever fixed-plus-PTZ dual camera that auto-tracks, solar power and subscription-free local storage, with 2.4GHz-only Wi-Fi as the main weak spot.

The verdict

The Eufy Cam S4 is a premium wire-free outdoor camera built around a standout dual-lens design: a fixed wide camera paired with a pan-tilt zoom lens that auto-tracks and follows movement for near 360 degree coverage with fewer blind spots. It shoots crisp 4K with color night vision, runs on battery with solar charging, and stores footage locally on 32GB built-in plus microSD or a HomeBase with no mandatory subscription. The catches are its 2.4GHz-only Wi-Fi (which can struggle in congested networks), a heavier app, and a premium price.

Best for
  • No-subscription seekers
  • Large properties & driveways
  • Solar / off-grid placement
  • Eufy HomeBase owners

Pros

  • Dual fixed-plus-PTZ lens with auto-tracking and up to 8x zoom for wide coverage
  • Sharp 4K video with color night vision
  • No mandatory subscription; local storage (32GB built-in plus microSD / HomeBase)
  • Battery with solar charging for low-maintenance, flexible placement
  • Reliable people and pet AI detection; integrates with Google Home, Alexa and Home Assistant
  • Responsive Eufy/Anker customer service

Cons

  • 2.4GHz Wi-Fi only; can struggle in congested networks
  • Vehicle detection inconsistent; often needs multiple cameras
  • Eufy app is heavy and slow, with reliability complaints after updates
  • Plastic housing and some reports of lens condensation in cold
  • No RTSP on battery and no power cable included for 24/7 wired recording
  • Premium price

Who is the Eufy Cam S4 for?

This is a high-end camera for people who want wide coverage and detail from a single unit, without paying a monthly fee. Its defining feature is the three-lens, fixed-plus-PTZ design: the wide lens (130 degrees) holds the whole scene while the pan-tilt zoom lens (355 degrees pan, 70 degrees tilt, with up to 8x auto zoom) actively tracks people, pets and vehicles. It is battery-powered with solar charging and an option to hardwire for 24/7 recording, making it suited to driveways, rural properties and spots far from an outlet. It works with Google Home, Alexa and Home Assistant (no HomeKit), and is a natural fit for existing Eufy HomeBase owners, with familiar-face recognition requiring a HomeBase S380.

What buyers love

The dual-camera tracking is the headline owners rave about: the way the top lens stays put while the bottom lens zooms and follows movement is repeatedly called the best in Eufy's lineup and a real coverage upgrade. The 4K image is praised as sharp and clear day and night, with solid color night vision. The no-monthly-fee, local-storage model (32GB built-in, expandable via microSD or a HomeBase) is a major draw for long-time Eufy fans, as is the solar charging that keeps batteries topped up with little maintenance. Setup with a HomeBase is described as quick and easy, the AI reliably tags people and pets, and many highlight Eufy/Anker's responsive customer service and fast refunds/price-matching.

What to know before you buy

The most consistent issue is connectivity: the camera is 2.4GHz Wi-Fi only (no 5GHz, no Ethernet), and owners in Wi-Fi-congested areas (apartments, lots of IoT devices) report intermittent connections, with one fixing it only by upgrading their router. Vehicle detection can be inconsistent on long driveways, often needing multiple cameras for reliable capture. The Eufy app is widely described as heavy and slow to navigate, and recent app updates drew complaints about lag, delayed loading and scheduling bugs. Other notes: the plastic housing and a few reports of lens condensation in cold weather, no RTSP while on battery, no power/USB cable included for 24/7 wired recording, motion can over-trigger on rain/snow, and quickly muting alerts takes several taps. It is also a premium-priced system.

Is the Eufy Cam S4 worth it?

For buyers who specifically want the auto-tracking dual-lens coverage, 4K detail and subscription-free local storage, it is worth the premium, and it is well rated by a large number of owners. It shines on properties where one camera covering a wide area with active zoom is genuinely useful, and the solar option keeps it low-maintenance. If your Wi-Fi is congested (consider the wired PoE Eufy line instead), you need rock-solid vehicle detection from a single unit, or you want a lighter app and a lower price, weigh those trade-offs first.

Frequently asked questions

Does the Eufy Cam S4 require a subscription?

No. It records locally with no mandatory monthly fee, using 32GB of built-in storage plus a microSD card (up to 256GB) or a Eufy HomeBase. A subscription is only optional for cloud storage.

How does the dual-camera tracking work?

It has a fixed wide-angle lens that captures the full scene and a separate pan-tilt zoom lens (355 degrees pan, 70 degrees tilt, up to 8x zoom) that automatically follows detected people, pets or vehicles, giving wide coverage with fewer blind spots from one unit.

Does it work with Alexa, Google Home or HomeKit?

It works with Amazon Alexa, Google Home and Home Assistant. It does not support Apple HomeKit or Samsung SmartThings.

Can it record 24/7?

Yes, but you need to hardwire it to constant power (a USB power cable is not included in the box). On battery it records events rather than continuously. It also supports solar charging to keep the battery topped up.

What are the connectivity limitations?

It connects over 2.4GHz Wi-Fi only, with no 5GHz band and no Ethernet. In homes with heavy 2.4GHz congestion some owners see intermittent connections; a stronger router or fewer competing devices resolves it, and a wired PoE Eufy system is an alternative.

At a glance

Summary

Everything this camera supports, grouped by category.

Size & Materials
Weather Resistance (IP65)
Power
WiredRechargeable BatterySolar Charging
Connectivity
2.4 GHz WiFi
Storage
InternalMicroSD Card SlotCloud (Subscription required)
Integrations
Google HomeAlexaHome Assistant
Video
HD Video2K Video4K VideoBlack & White Night VisionColor Night Vision24/7 Live Streaming24/7 Video History (When wired to power)Video Event HistoryOffline Video Event HistoryPowerless Video Event HistoryRTSP
Alerts
MotionPeopleAnimalsVehiclesFamiliar Faces (HomeBase S380 required)
Features
LightTalk & ListenCustomizable Motion ZonesSiren

Price History

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Company
Eufy logo

Eufy

4.3/ 5 avg ratingChina flagHeadquartered in China

Eufy, a brand of Anker, makes a wide range of smart home and security devices including robot vacuums, security cameras, video doorbells and smart locks. Eufy emphasizes local storage and subscription-free options for its cameras, appealing to privacy-conscious buyers. Its products integrate with Alexa and Google Home.

Full specifications

Every spec, organized

Browse the full breakdown by category. Tap the on any row for what it means, or the for sources and documentation.

Size & Materials
Weather Resistance

IP65

Dimensions

?

Weight

?

Available in colors

NO

Included accessories
MicroSD Card

NO

Power
Wired

YES

PoE

NO

Rechargeable Battery

YES

44.3 Wh

Battery Life

?

Solar Charging

YES

Connectivity
2.4 GHz WiFi

YES

5 GHz WiFi

NO

Ethernet

NO

4G

NO

Storage
Internal

YES (32GB)

MicroSD Card Slot

YES

Up to 256GB

Cloud

Subscription required

Integrations
Google Home

YES

Alexa

YES

Apple HomeKit

NO

Samsung SmartThings

NO

Home Assistant

YES

IFTTT

NO

Video
HD Video

YES

2K Video

YES

4K Video

YES

HDR

?

Black & White Night Vision

YES

Color Night Vision

YES

24/7 Live Streaming

YES

24/7 Video History

When wired to power

Video Event History

YES

Offline Video Event History

YES

Powerless Video Event History

YES

Aspect Ratio

?

Field of View

130° Wide / 46° Telephoto

Pan & Tilt

355° Pan / 70° Tilt

RTSP

YES

Alerts
Motion

YES

People

YES

Animals

YES

Vehicles

YES

Familiar Faces

HomeBase S380 required

Packages

NO

Glass breaking Sound

NO

Baby Crying Sound

NO

Smoke Alarm Sound

NO

Carbon Monoxide Alarm Sound

NO

Hub
Zigbee Coordinator

NO

Thread Border Router

NO

Matter Bridge

NO

Features
Light

YES

GPS

NO

Talk & Listen

YES

Customizable Motion Zones

YES

Privacy Zone

?

Siren

YES

Gestures Recognition

NO

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