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Today, Eufy has announced the new eufyCam S4, described as the industry’s first do-it-yourself solar-powered hybrid camera.
This new device combines a 4K fixed bullet lens with dual 2K pan-tilt-zoom (PTZ) lenses. This tri-cam design is intended to deliver 360-degree coverage and non-stop solar-powered security. The camera system is also stated to provide detailed facial recognition from distances of up to 15 metres.
This launch follows an earlier 2025 product release from the brand, the eufy PoE NVR Security System S4 Max. That system was described as the world’s first NVR system powered by an integrated large AI model technology, known as the Local AI Agent, and was also equipped with tri-cam bullet and PTZ cameras for 360-degree surveillance.
With the release of the eufyCam S4, the company states it is introducing that same multi-angle protection concept into a single, compact device. The design is positioned as a solution that replaces and outperforms the use of separate bullet and PTZ cameras, offering a more versatile security option.
A Triple-Lens Hybrid Camera System
The eufyCam S4’s primary feature is its triple-lens configuration, which pairs a 4K wide-angle bullet camera with a 2K dual-lens PTZ camera. This allows the single device to deliver both comprehensive monitoring of a wide area and precision tracking of specific subjects.
The Fixed Bullet Lens
The bullet camera component is a fixed-position lens. It captures footage in 4K resolution and offers a 130-degree fixed field of view, as confirmed by the product’s specifications. The intended function of this wide-angle lens is to provide broad area coverage. It is designed to keep a steady watch over key entry points, such as doors and driveways, ensuring these critical zones are persistently monitored.
The Dual-Lens PTZ Camera
Working in tandem with the bullet lens is the pan-tilt-zoom camera. This component features dual 2K lenses and provides 360-degree field-of-view tracking. One of the lenses is a telephoto lens with a 46-degree field of view. Unlike the static bullet camera, the PTZ camera is designed for active monitoring. It can observe larger or more dynamic areas, such as yards and open spaces. Its function is to provide detailed, close-up views of activity within its range by moving and zooming.
The camera system also includes features for night-time operation. It is equipped with five LED spotlights which are used to provide colour night vision, allowing the camera to capture full-colour images in low-light conditions.
Advanced AI Tracking and Surveillance
The hardware components of the eufyCam S4 are coordinated by artificial intelligence systems to track activity. The system uses what the company calls AI Tracking 2.0. This technology enables the 4K bullet camera and the 2K PTZ camera to work together seamlessly.
As activity moves across different zones, the cameras can automatically coordinate their actions and reframe the shot. This feature is also referred to as Bullet-co-PTZ Tracking.
The system is also equipped with a feature named Intelligent Auto-Framing, which is also noted in the product’s list of key functions. With this capability, the PTZ lenses can lock onto motion. Once locked, they automatically zoom in or out with precision to keep the subject in frame. This system is designed to smoothly track people or objects at a distance of up to 50 metres, or 164 feet.
The stated goal of this combined triple-lens hardware and AI tracking software is to deliver versatile coverage across a property, capturing details without blind spots.
Solar Power and Hardware Durability
The eufyCam S4 is designed for non-stop operation using a built-in solar charging system.
Solar Panel Technology
The camera features a built-in 5.5W solar panel, which is described by eufy as its largest and most efficient panel to date. Product information states that this panel can fully charge the camera for an entire day’s operation with just one hour of direct sunlight. This feature is identified in specifications as SolarPlus 2.0.
The solar panel has a detachable design, offering versatility for installation. A user can choose to detach the panel from the camera body and position it separately. This allows the panel to be placed in a location with optimal sun exposure, even if the camera itself is in a shaded area. Alternatively, the panel can remain attached to the camera for a cleaner, low-drill setup.
Physical Construction
The solar panel has been designed for durability in outdoor environments. It features a unique edge-sealed design. This construction method is intended to enhance its durability by preventing common issues such as warping and bubbling, which can occur with outdoor exposure.
Furthermore, the panel is made using ethylene tetrafluoroethylene (ETFE) film. This material was chosen for its superior resistance to water, dust, and corrosion. These characteristics contribute to the long-lasting outdoor performance of the solar charging system.
To ensure the camera remains powered even in extreme conditions or during periods of prolonged low light, it is also equipped with a quick-swap rechargeable battery.
Detection, Deterrence, and Recording
The eufyCam S4 includes a multi-faceted system for detecting motion, deterring intruders, and storing footage.
Dual Motion Detection
The camera uses a dual motion detection system to identify movement accurately. This system combines two types of technology: radar and passive infrared (PIR). This dual approach is designed to accurately identify the movement of humans and vehicles. A primary benefit of this system is the minimisation of false alerts, which can be triggered by non-relevant motion like falling leaves or small animals. Product specifications also note that the AI can identify humans, vehicles, and pets.
Active Deterrence Features
When the detection system identifies an intruder approaching the property, the eufyCam S4 activates a powerful deterrence sequence. This includes both visual and auditory warnings.
The visual deterrent consists of red and blue warning lights. These lights, along with the 5-LED spotlights, activate to draw attention to the intruder. Simultaneously, the camera emits a 105dB siren. This combination of flashing lights and a loud siren delivers a strong deterrent signal to discourage trespassers and keep the home secure. The product information also notes the availability of customisable zones and schedules, allowing users to define where and when the detection and deterrence features are active.
Recording and Storage Options
For storing video footage, the eufyCam S4 has several options. It comes with built-in local storage in the form of 32 GB eMMC. For users who require additional storage capacity, the camera includes a microSD card slot, allowing the storage to be expanded up to 256 GB.
The camera also offers a 24/7 continuous recording capability. However, product specifications note that this feature is only available when the camera is connected directly to a main power source, as continuous recording would otherwise deplete the battery and solar charge.
HomeBase S380 Integration and AI Capabilities
While the eufyCam S4 can function as a standalone device, it can also be paired with the eufy HomeBase S380. The company states that when paired, the camera becomes part of an intelligent home security system that works smarter and more efficiently.
BionicMind AI and Local Processing
When connected to the HomeBase S380, the division of tasks changes. The camera focuses on its primary job of capturing clear details, while the HomeBase S380, which is powered by BionicMind AI, handles the heavy-lifting of data processing.
This “Local AI Recognition” means the HomeBase S380 performs facial recognition and identifies people, vehicles, and pets. This processing is all done locally on the HomeBase device rather than in the cloud, which serves to keep the user’s data private and secure. The BionicMind AI is designed to accurately recognise faces and differentiate between various detected objects.
HomeBase-Specific Features
Pairing with the HomeBase S380 also enables several advanced surveillance features that are not available with the camera alone.
One such feature is Cross-cam Tracking. This function is designed for users with multiple eufy cameras. It automatically links related footage from these different cameras into one continuous event. This simplifies the process of reviewing an event that moves from one camera’s view to another.
Another HomeBase-dependent feature is 24/7 Snapshots. This allows users to visually monitor their property around the clock without continuously streaming video, which would drain the camera’s battery. This feature combines always-on awareness with the long-lasting performance required of a battery-powered device. Both Cross-cam Tracking and 24/7 Snapshots are listed in the product specifications as requiring the HomeBase S380.
The HomeBase S380 also provides options for expandable local storage, with specifications for the 2-Cam Kit model indicating a capacity of up to 1 TB using a hard drive.
Pricing & Availability
• The eufyCam S4 is available now priced from:
- Solo Camera: £249
- 2-Cam Kit with HomeBase S380: £549
- 4-Cam Kit with HomeBase S380: £949 – only from eufy.com/uk
I am James, a UK-based tech enthusiast and the Editor and Owner of Mighty Gadget, which I’ve proudly run since 2007. Passionate about all things technology, my expertise spans from computers and networking to mobile, wearables, and smart home devices.
As a fitness fanatic who loves running and cycling, I also have a keen interest in fitness-related technology, and I take every opportunity to cover this niche on my blog. My diverse interests allow me to bring a unique perspective to tech blogging, merging lifestyle, fitness, and the latest tech trends.
In my academic pursuits, I earned a BSc in Information Systems Design from UCLAN, before advancing my learning with a Master’s Degree in Computing. This advanced study also included Cisco CCNA accreditation, further demonstrating my commitment to understanding and staying ahead of the technology curve.
I’m proud to share that Vuelio has consistently ranked Mighty Gadget as one of the top technology blogs in the UK. With my dedication to technology and drive to share my insights, I aim to continue providing my readers with engaging and informative content.
