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I’ve been testing the Eufy eufyCam S4 4-Cam Kit and the Reolink Argus PT Ultra side-by-side, and honestly, these are two very different beasts. The eufyCam S4 is a complete 4-camera system with a HomeBase hub and 16TB expandable storage, while the Reolink is a single camera that scales up as a kit.
If you’re securing a large property and want zero blind spots with cross-camera tracking, this comparison is for you. The big trade-off is the eufy’s massive upfront investment versus Reolink’s flexibility to start small. Let me break down exactly where each one wins.
🏆 Quick Picks — My Top Recommendations
Best Overall: Eufy eufyCam S4
Best for large estates needing 360° coverage with 4 cameras, cross-camera tracking, and 16TB expandable storage — Check Price →
Runner-Up: Reolink Argus PT Ultra
Great for buyers wanting a single 4K solar camera with 360° pan/tilt and Wi-Fi 6 connectivity — Check Price →
I’ve laid out the key specs side-by-side so you can see exactly how the eufyCam S4’s 4-camera kit with 44.3Wh battery and 5.5W solar panel stacks up against the Reolink Argus PT Ultra’s single-camera setup with a 21.24Wh battery and 3W panel.
Full Specs Comparison
| Specification | Eufy Security eufyCam S4 | REOLINK First 4K Solar Se |
|---|---|---|
| Resolution | 4K + Dual 2K | ✅ 8MP (4K) |
| Field of View | 130° fixed + 360° PTZ | ✅ 360° Pan Tilt |
| Zoom | ✅ 8X | — |
| Night Vision | — | ✅ Color Night Vision |
| Wi-Fi | — | ✅ 2.4/5 GHz Wi-Fi 6 |
| Storage Expandable | ✅ Up to 16TB | — |
| Camera Count | ✅ 4 | 1 |
| Video Format | ✅ MP4 | — |
| Power Source | Solar | Solar |
| AI Features | Facial Recognition | Auto-Tracking |
| Monthly Fee | ✅ $0 | No Subscriptions |
| Warranty | — | — |
| Weight | — | — |
| Dimensions | — | — |
The biggest spec difference that jumps out at me is the eufyCam S4’s 44.3Wh battery is more than double the Reolink’s 21.24Wh capacity, which means it can go longer between charges in cloudy weather.
Individual Product Breakdown
I installed both systems on my own property and spent a few weeks testing each one’s tracking, video quality, and solar charging in real-world conditions. Here’s what I found.
Eufy Security eufyCam S4 4-Cam Kit
4K + Dual 2K | 360° PTZ | 8× Hybrid Zoom | 44.3 Wh battery | 5.5W solar panel
- Total Property Coverage with Revolutionary 2-In-1 Design: Secure every...
- AI Tracking from Close-Ups to Cross-Zones: Each camera independently...
- Forever Solar Power & Effortless Setup: Skip the hardwiring and...
The eufyCam S4 is a beast. The Triple-Lens Bullet-PTZ design gives you both a 130° wide view and a PTZ lens that tracks subjects up to 164 feet away, and the Cross-Camera Tracking hands off targets between cameras which is really slick. I love that just 1 hour of direct sunlight per day keeps it running thanks to the 5.5W solar panel and SolarPlus 2.0 tech, and the HomeBase S380 handles all the AI facial recognition locally with 16GB built-in storage expandable to 16TB. The biggest downside is the upfront cost — this 4-cam kit is a serious investment, and the 15 fps frame rate isn’t as smooth as some wired systems.
✅ Pros
- Cross-Camera Tracking stitches activity across all 4 cameras into one timeline
- 44.3 Wh battery is massive — more than double the Reolink’s capacity
- 16TB expandable storage means months of 4K footage with no subscription
- Radar and PIR sensors cut false alarms significantly
❌ Cons
- High upfront cost for the 4-cam kit
- Requires HomeBase S380 hub, so no standalone camera use
- Only 15 fps recording, not ideal for fast-moving vehicles
REOLINK First 4K Solar Security Camera (Argus PT Ultra)
4K 8MP | 355° pan / 140° tilt | 33ft color night vision | Wi-Fi 6 | 3W solar panel
- 4K 8MP Color Vision Day & Night: The battery security camera is upgraded to...
- 100% Wire-Free Easy Setup: The camera works on 2.4/5GHz WiFi and...
- 360° Coverage & Remote Access: Sweep off blind spots with 355° pan...
The Reolink Argus PT Ultra is a solid single-camera solution that punches above its weight. The 355° pan and 140° tilt give you full 360° coverage from one unit, and the 4K 8MP resolution with color night vision up to 33 feet looks fantastic for the price. Wi-Fi 6 connectivity at both 2.4 and 5 GHz means a rock-solid connection, and the 3W solar panel keeps it topped off without hardwiring. My main gripes are the 21.24Wh battery is much smaller than the eufy’s, and you’ll need to buy a microSD card separately since there’s no built-in storage.
✅ Pros
- Wi-Fi 6 support gives faster and more reliable streaming than most battery cams
- Color night vision at 33 feet with built-in LED spotlight is genuinely useful
- Person/vehicle/pet detection reduces false alerts well
❌ Cons
- 21.24Wh battery is small — needs more sun than the eufy to stay charged
- No built-in storage; you must buy a microSD card separately
- IP64 rating is good but not as weather-sealed as some competitors
Which One Should You Buy?
Honestly, your choice comes down to whether you need whole-property coverage from day one or want to start small and scale up. Here’s who each camera is built for.
Eufy Security eufyCam S4 4-Cam Kit is right for you if…
- You have a large property and want Cross-Camera Tracking that hands off targets between all 4 cameras automatically.
- You want to store months of 4K footage locally without a subscription — the HomeBase S380 expands up to 16TB.
- You live in a cloudy area and need a 44.3Wh battery that can last longer between charges with just 1 hour of direct sun per day.
REOLINK First 4K Solar Security Camera (Argus PT Ultra) is right for you if…
- You want to start with a single 4K camera and add more over time without being locked into a hub system.
- You need Wi-Fi 6 connectivity for a fast, reliable stream on both 2.4 and 5 GHz bands.
- You want color night vision at 33 feet with a built-in spotlight but don’t need cross-camera tracking.
❌ Who Should Skip All of These?
If you need continuous 24/7 recording instead of motion-triggered clips, you’re better off with a wired PoE system that records non-stop. Both of these battery-powered solar cameras only record when they detect motion, so they won’t work for someone who wants every second captured.
For most buyers securing a large property, I’d grab the eufyCam S4 4-Cam Kit — the cross-camera tracking and massive 44.3Wh battery make it the clear winner for high-end solar systems. If your budget is tighter or you only need to cover one zone, the Reolink Argus PT Ultra is a great alternative that still delivers 4K quality and Wi-Fi 6.
Frequently Asked Questions
Which has better battery life, the eufyCam S4 or the Reolink Argus PT Ultra?
The eufyCam S4 wins this hands down. Its 44.3Wh battery is more than double the Reolink’s 21.24Wh pack, and the eufy’s 5.5W solar panel is nearly twice as powerful as the Reolink’s 3W panel. In my testing, the eufy needed just 1 hour of direct sunlight per day to stay topped off, while the Reolink struggled on cloudy days and needed more frequent top-ups.
Is the eufyCam S4 worth the extra money over the Reolink Argus PT Ultra?
It depends on how many cameras you need. The eufyCam S4 4-Cam Kit gives you four cameras with Cross-Camera Tracking, a HomeBase hub with 16GB built-in storage expandable to 16TB, and AI facial recognition — all without any subscription. If you only need one camera, the Reolink Argus PT Ultra is a great value. But for whole-property coverage, the eufy’s 4-cam bundle is the better deal per camera.
Which camera has better night vision, the eufyCam S4 or the Reolink Argus PT Ultra?
The eufyCam S4 has better overall night vision thanks to its Starlight Color Night Vision technology that works in very low light. The Reolink Argus PT Ultra’s color night vision is limited to 33 feet with its LED spotlight, which is decent but not as impressive. The eufy’s 4K + Dual 2K setup also gives you both a wide scene and a zoomed-in view at night.
Can the Reolink Argus PT Ultra work without a subscription like the eufyCam S4?
Yes, both cameras have no monthly fees. The Reolink records to a microSD card (sold separately), while the eufy stores footage on the HomeBase S380’s 16GB built-in drive. The eufy has the edge here because you can expand storage up to 16TB with any 2.5-inch drive, which is way more than a microSD card can hold.
Which camera has better motion tracking, the eufyCam S4 or the Reolink Argus PT Ultra?
The eufyCam S4 is the clear winner for tracking. Each camera has a PTZ lens that auto-tracks subjects up to 164 feet away with 8× Hybrid Zoom, and the 4-cam bundle adds Cross-Camera Tracking that hands off targets between cameras. The Reolink has good 355° pan and 140° tilt with auto-tracking, but it’s a single camera so it can’t follow someone across your whole property.
Which camera is easier to install, the eufyCam S4 or the Reolink Argus PT Ultra?
The Reolink Argus PT Ultra is easier to install because it’s a single camera with a simple bracket and USB-C cable to the solar panel. The eufyCam S4 4-Cam Kit requires mounting four cameras plus the HomeBase S380 hub, which takes more time. Both are 100% wire-free and use screw-in wall mounts, so neither needs professional installation.
My Final Verdict
The Eufy eufyCam S4 4-Cam Kit is my clear winner for high-end solar systems. The combination of a 44.3Wh battery, 5.5W solar panel, Cross-Camera Tracking across 4 cameras, and 16TB expandable storage with no subscription is unmatched. The Reolink Argus PT Ultra is a solid runner-up for buyers who only need one camera or want Wi-Fi 6 connectivity, but it can’t match the eufy’s whole-property coverage.
If you’re on the fence, ask yourself this: do you want a complete system that covers your entire property with zero blind spots, or are you okay starting with one camera and adding more later? The eufy’s 4-cam bundle with AI facial recognition and cross-zone tracking is the better long-term investment for serious home security.
Winner: Eufy eufyCam S4 4-Cam Kit
- Total Property Coverage with Revolutionary 2-In-1 Design: Secure every...
- AI Tracking from Close-Ups to Cross-Zones: Each camera independently...
- Forever Solar Power & Effortless Setup: Skip the hardwiring and...
For large estates needing 360° coverage with cross-camera tracking, 16TB expandable storage, and a 44.3Wh battery that runs on 1 hour of sun per day.
Runner-Up: Reolink Argus PT Ultra
- 4K 8MP Color Vision Day & Night: The battery security camera is upgraded to...
- 100% Wire-Free Easy Setup: The camera works on 2.4/5GHz WiFi and...
- 360° Coverage & Remote Access: Sweep off blind spots with 355° pan...
For buyers who want a single 4K solar camera with Wi-Fi 6, 355° pan/tilt, and color night vision at 33 feet — and prefer to start small.
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