eufyCam S4 Solar Security Camera - Triple-Lens 4K PTZ

In this review of the eufyCam S4, the bottom line is simple: if you want a single outdoor camera that replaces a separate bullet and PTZ setup, this is it. The S4 blends a 4K fixed bullet lens with a 2K dual-lens PTZ module so the system can monitor wide areas and then lock on to individuals for detail. The camera's built-in solar charging and on-device AI mean it can run independently for routine surveillance, while optional HomeBase S380 integration unlocks advanced cloud-style features for users who want longer retention and smarter identification.

Key Features

• Triple-lens design: Combines a 4K 130 fixed wide view with a 2K dual-lens PTZ so users get both broad coverage and close-up detail without extra cameras.
• Bullet-to-PTZ tracking: The system auto-locks and follows detected subjects, zooming in to capture identifying features up to about 164 ft away.
• SolarPlus charging: An ultra-large 5.5W detachable solar panel and SolarPlus 2.0 keep the camera running with as little as 1 hour of direct sunlight a day.
• Standalone operation: On-device AI provides human, vehicle, and pet detection with 32 GB internal storage, allowing the camera to work without a HomeBase.
• HomeBase S380 compatibility: When paired with the S380 and updated firmware, users unlock BionicMind AI, 24/7 recording, Snapshots, and large expandable storage options for extended retention.
• Active deterrence: Radar and PIR sensors reduce false alerts and trigger red/blue warning lights plus a 105 dB siren to deter intruders.

Who It's For

The eufyCam S4 suits homeowners and small businesses that need flexible coverage from a single device: wide-area monitoring by day and precision zoom and tracking when motion is detected. It is especially useful where running power is difficult and solar charging simplifies maintenance.

Prospective buyers who require continuous cloud storage and the most advanced person-recognition should plan to use the HomeBase S380; those who prefer a different NVR or older HomeBase models should look elsewhere because other HomeBases and eufy NVR are not supported for the S380-only features.

Pros & Cons

Pros

• Excellent image flexibility from the combined 4K bullet and 2K PTZ lenses for both overview and zoomed detail.
• Reliable solar charging with a large 5.5W panel keeps the camera powered with minimal sunlight.
• On-device AI and built-in storage enable standalone operation without a required hub.

Cons

• Advanced BionicMind features and 24/7 recording require the HomeBase S380 and a specific firmware update, limiting compatibility.
• microSD expansion is supported but the card is not included, so additional purchase may be necessary for local retention.

Specifications

Our Verdict

The eufyCam S4 is a versatile outdoor camera that delivers real value for users who want both wide-area coverage and targeted close-up tracking from a single device. Its solar charging and on-device AI make it practical for independent setups, while HomeBase S380 owners get more advanced recording and identity features. For most homeowners seeking flexible security without running power, this camera is a solid, cost-effective option.

Frequently Asked Questions

Does the S4 work without a HomeBase?
Yes. The camera can operate independently using on-device AI, 32 GB internal storage, and microSD expansion.

How is the camera powered?
It uses a 5.5W detachable solar panel with SolarPlus 2.0 so one hour of direct sunlight a day can keep it running.

What do you get with HomeBase S380?
Pairing with the S380 and the required firmware unlocks BionicMind AI, 24/7 recording, Snapshots, and expanded storage options up to multi-terabytes.