How much does the eufyCam S3 Pro cost?

The eufyCam S3 Pro add-on camera runs around $220 on its own, or roughly $550 for a 2-camera kit bundled with the HomeBase 3, according to this site's own eufy pricing. The add-on price only applies if you already own a HomeBase 3 ($199.99 list on its own) — buying the camera without one leaves you with hardware that can't record anything.

What is the eufyCam S3 Pro's frame rate?

15 frames per second at its full 4K resolution, according to multiple retailer spec sheets (PB Tech, Aspen Solutions). That matches this site's own Reolink Argus 4 Pro pick, which caps at the identical 15fps per Reolink's own spec sheet, but it's noticeably choppier than the lower-resolution 2K Arlo Pro 6, which runs 24fps per retailer listings. Resolution and smoothness are two separate trade-offs, and the S3 Pro leans toward the first.

Does the eufyCam S3 Pro need a HomeBase to work?

Yes — it's a HomeBase-paired eufyCam, not a standalone SoloCam. The camera has no onboard storage of its own; every clip routes through a HomeBase 3's built-in storage or an attached hard drive, as this site's eufy HomeBase 3 review already covers. Without one, the camera is non-functional for recording, regardless of what an 'add-on camera' listing's price suggests.

Does the eufyCam S3 Pro require a monthly subscription?

No. Like the rest of eufy's lineup, footage records locally to the HomeBase 3 (or its attached hard drive) with no mandatory fee, according to eufy. An optional eufy cloud plan only adds off-site backup on top of the local copy.

How good is the eufyCam S3 Pro's night vision?

Strong for a battery camera. eufy's own product page lists MaxColor Vision with a 25-foot color night-vision range, an f/1.0 aperture for better low-light gathering, and PIR-plus-radar motion detection out to 40 feet (12m) — radar helps cut down on the false triggers a PIR-only sensor throws from blowing branches or passing cars.

eufyCam S3 Pro Review (2026): The Frame-Rate Catch Nobody Mentions

Quick Answer: The eufyCam S3 Pro is a 4K HomeBase-paired camera with MaxColor Vision night vision, a 135° field of view, and a SolarPlus panel, priced around $220 as an add-on (roughly $550 for a 2-camera kit with the HomeBase 3 included), according to this site’s own eufy pricing. The catch the spec sheet buries: that 4K feed is capped at 15 frames per second, according to retailer spec listings — the same ceiling as this site’s Reolink Argus 4 Pro pick, but noticeably choppier than the lower-resolution Arlo Pro 6’s 24fps.

This is this site’s own “best overall” eufy pick — named across 26 pages, including the best eufy camera roundup, eufy vs. Wyze, and eufy HomeBase 3 review — but it’s never had a dedicated review of its own. Here’s the full picture, including the frame-rate trade-off the 4K headline doesn’t mention.

eufyCam S3 Pro at a glance

Spec	eufyCam S3 Pro
Price	$220 add-on camera, $550 2-cam kit w/ HomeBase 3, per eufy
Resolution	4K (3840 x 2160)
Frame rate	15fps at full 4K, per retailer spec sheets
Field of view	135° (112° horizontal, 60° vertical)
Aperture	f/1.0
Night vision	MaxColor Vision, 25ft color range
Motion detection	PIR + radar, up to 40ft (12m)
Power	Rechargeable battery + SolarPlus panel
Local storage	None onboard — routes through HomeBase 3
Subscription	Not required; optional cloud backup only

By the numbers

15fps at 4K, not 30: retailer spec sheets for the S3 Pro consistently list a 15fps ceiling at full resolution. That’s the same cap this site found on the Reolink Argus 4 Pro’s own spec sheet, but it’s a real step down from the 24fps the 2K Arlo Pro 6 runs at, per retailer listings for that camera. A sharper still frame doesn’t guarantee smoother motion.
f/1.0 aperture, 25ft color night range: eufy’s own spec page lists an f/1.0 aperture, wider than most security cameras, feeding the MaxColor Vision sensor a 25-foot range for full-color night footage before it has to fall back to infrared.
$0 onboard storage: the S3 Pro ships with no built-in memory of its own. Every clip has to reach a HomeBase 3’s storage first — the same hub this site’s own HomeBase 3 review found ships with only enough built-in capacity for two to three months of clips before you need your own hard drive.

What holds up

eufyCam S3 Pro

This site's best-overall eufy pick · $220 add-on / $550 2-cam kit

True 4K resolution with an f/1.0 aperture and MaxColor Vision color night vision.
PIR + radar motion detection cuts down on false triggers from branches or passing cars.
SolarPlus panel keeps the battery topped up without cable runs in most sunny spots.
No mandatory subscription — recorded clips stay local on the HomeBase 3 by default.

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For buyers who already own — or are willing to buy — a HomeBase 3, the S3 Pro delivers real 4K detail, strong low-light color, and smarter motion detection than a PIR-only camera, all without a monthly fee eating into the value.

What holds it back

The 4K headline hides a frame-rate trade-off nobody puts on the box. At 15fps, fast motion — a car passing, a person jogging by — renders closer to a slideshow than smooth video, the same limitation this site found on the Reolink Argus 4 Pro. It’s not a defect unique to eufy; it’s a common compromise on battery-powered 4K cameras trying to manage power and bandwidth. But it means the resolution number alone overstates how sharp fast-moving footage will actually look. The second catch is sequencing, not video quality: the S3 Pro has zero storage of its own, so an “add-on camera” purchase only makes sense if a HomeBase 3 is already running — buy the camera first without checking that box, and there’s nowhere for its footage to go.

How it compares

Against the standalone eufy SoloCam S340, the S3 Pro trades simplicity for resolution and AI face recognition — the SoloCam skips the HomeBase requirement entirely. Against the Reolink Argus 4 Pro, the two cameras share the same 15fps ceiling but differ on bundling: Reolink sells the Argus 4 Pro only with its solar panel included, while eufy’s S3 Pro is the opposite, sold camera-only by default. See the full lineup in our best eufy camera roundup.

The bottom line

The eufyCam S3 Pro earns its spot as this site’s best-overall eufy pick on resolution, night-vision color, and smarter motion detection — all with no subscription required. Just budget for a HomeBase 3 if you don’t already have one, and don’t expect the 4K number alone to mean silky-smooth video of anything moving quickly through the frame. See our best eufy camera guide for how the rest of eufy’s 2026 lineup stacks up.