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 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.
- 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.










