Reolink Duo 3V PoE vs RLC-811A
Duo 3V PoE is designed to replace two adjacent wide cameras with one stitched 180° view. RLC-811A does the opposite: it narrows the scene with 5× optical zoom to concentrate pixels on a smaller target area.
| Feature | Duo 3V PoE | RLC-811A |
|---|---|---|
| Resolution | 7680×2160, 16MP @ 20fps | 3840×2160, 8MP |
| Horizontal coverage | 180° panoramic | 105°–31° |
| Lens | Dual 2.8mm F1.6 | 2.7–13.5mm motorized |
| Optical zoom | No | 5× |
| Typical main-stream bitrate | 10,240 Kbps default; up to 12,288 Kbps documented | Lower aggregate pixel load than Duo; configure to scene needs |
| Power | 802.3af PoE / 12V DC | 802.3af PoE / 12V DC |
| Local storage | microSD / NVR / FTP | microSD / NVR / FTP |
| Weather / impact | IP67 / IK10 | IP67 |
Choose Duo 3V when blind spots are the problem
The Duo 3V's two sensors are stitched into one 180° panorama. That can replace two overlapping cameras across a broad façade, yard, loading area or building corner. Its main advantage is coverage efficiency: fewer mounting points and one continuous panoramic scene.
Reolink's current page documents 16MP at 20 fps and a default main-stream bitrate around 10 Mbps, so it is not a “free” replacement for two cameras from a storage perspective. The recorder still has to absorb a much larger stream than a typical 4K camera.
Choose RLC-811A when target detail is the problem
The RLC-811A can narrow to roughly 31° horizontally. That makes it much better for a gate, lane, doorway or long driveway where one small area matters more than seeing everything around it.
At the same distance, a narrow optical field can put far more pixels on the target than a 180° panorama. A panoramic camera can have more total megapixels while still delivering fewer pixels on a distant plate or face because those pixels are spread across an enormous scene.
One camera versus two evidence jobs
Do not use the Duo simply to reduce camera count if the scene contains both overview and identification requirements. A single 180° view may be excellent for situational awareness but still weak for a narrow plate lane. In that case, Duo plus a dedicated evidence camera can be stronger than trying to make one camera do both jobs.
Storage planning matters more with Duo
Reolink documents up to 12,288 Kbps on the Duo 3V main stream. At continuous recording, that can materially increase retention requirements. Use your actual configured bitrate in the Storage Calculator instead of assuming “one camera” equals one ordinary 4K stream.
Official reference: Reolink Duo 3V PoE specs. Related: Identification Distance Calculator · Model Database.