Eufy Cam S4 vs Reolink Duo 3 PoE

The Reolink Duo 3 PoE is the stronger pick overall, with a higher owner rating, a 16MP dual-lens 180-degree view, wired PoE reliability, IP67 weatherproofing and a 2-year warranty. The Eufy Cam S4 is the better choice if you need solar-charged, wire-free placement with more storage and pan-tilt tracking.

Resolution, coverage and power. The Reolink Duo 3 PoE uses two 16MP sensors to stitch a fixed 180-degree panoramic image over a wired Ethernet connection, while the Eufy Cam S4 is a battery-and-solar 4K camera whose second lens pans and tilts to track movement.

The Eufy Cam S4. Its rechargeable battery and solar charging let it mount where there is no power or network cable. The Reolink Duo 3 PoE draws power and data over one Ethernet run to a PoE switch or injector, which is very stable but restricts where it can go.

The Reolink Duo 3 PoE covers more in a single frame with its 16MP 180-degree panoramic view. The Eufy Cam S4 stores more locally, adding 32GB of built-in storage alongside a microSD card, and both record without a subscription and support RTSP.

Buy the Reolink Duo 3 PoE if you want top-tier 16MP panoramic coverage from one wired camera, with a rugged IP67 build, 24/7 recording, RTSP/ONVIF and a 2-year warranty. It suits NVR and self-hosted setups watching large areas.

Buy the Eufy Cam S4 if running Ethernet is not practical and you want a solar-charged 4K camera with pan-tilt auto-tracking and plenty of local storage. It is built for driveways and remote spots that need coverage without wiring.