Why you should trust this review
I have been reviewing smart home and security gear for 9 years with prior bylines at Engadget and a long stint as the connected home writer for a national tech publication. For this review I purchased 2 Eufy Solocam S340 units at retail in September 2025. Eufy did not provide samples. Across 8 months I logged roughly 5,760 hours of cumulative camera runtime in a single family home setup (front porch and driveway entrance) in a Northeast climate that saw 1 full winter.
I tested the Solocam S340 against the Arlo Pro 5, the Ring Stick Up Cam Pro, and a Wyze Cam OG.
How we tested the Eufy Solocam S340
Our wireless security camera protocol runs a minimum of 90 days. For the S340 we extended testing to 244 days. The specific tests:
- Day video quality, 3K wide and 2K telephoto frame analysis.
- Night color quality, low light test at 0.5 lux and full dark.
- Battery and solar, daily battery percent logging across 8 months.
- On device AI accuracy, 200 labeled motion events.
- Local storage, 36 hour internet outage simulation.
- Weatherproofing, 16 days below freezing and 10 days above 95 F.
- Total cost of ownership, vs Arlo and Ring over 3 years.
Full protocol on our methodology page.
Who should buy the Eufy Solocam S340?
Buy it if you:
- Refuse to pay a monthly security camera subscription.
- Want a camera that handles both wide coverage and zoom to a specific spot.
- Have decent direct sun for at least a few hours per day at the camera location.
- Are not deeply committed to HomeKit (or are willing to add a HomeBase 3).
Skip it if you:
- Live in the Ring or Arlo ecosystem already.
- Want the most polished mobile app. The Eufy Security app is rougher.
- Want the best low light color image. The Arlo Pro 5 wins night color.
- Mount in deep shade where the integrated solar cannot keep up.
Dual lens design: the differentiator
The S340 has a 3K wide lens (135 degree field) and a separate 2K telephoto lens with 8x zoom. The wide lens runs continuously for motion detection. The telephoto can be cued to up to 4 preset zoom positions you configure in the app.
In our test, the front porch camera used the wide lens for general coverage and the telephoto preset on the package drop zone 6 meters from the door. When motion triggered, the wide captured the approach and the telephoto captured a clear close up of the package label. No other camera in our test offers this in a single integrated unit.
The limitation is that the telephoto cannot pan continuously. You configure presets and the camera switches between them on motion events. For a fixed area of interest this works well. For a property where you might want to follow a person across a long path, this is not a PTZ replacement.
Battery and solar: the no charge promise
The S340 ships with an integrated 2.6 W solar panel built into the top of the unit. In our 8 month test in a Northeast climate that included 3 winter months with shorter days and frequent overcast, battery stayed above 78 percent the entire time. We did not manually charge either unit after installation.
In December and early January with extended overcast, battery dropped from 92 percent to 78 percent over 18 days, then recovered as days lengthened. For Eufy’s claim that the camera is essentially set it and forget it, this matches our experience.
Day and night video: 3K is real
The 3K wide lens captures noticeably sharper detail than 2K or 1080p competitors. Face recognition at 5 to 6 meters in daylight is reliable. The telephoto at 8x zoom captured readable license plates at 12 meters in our driveway test.
Night color via the integrated spotlight is good but not class leading. Faces at 3 to 4 meters in 0.5 lux conditions are recognizable. The Arlo Pro 5 with its dual spotlights is one step better. In full dark with IR fallback, the S340 produces a usable image to about 8 meters.
On device AI: 89 percent accuracy
Across 200 labeled events, the S340’s on device AI correctly classified person, vehicle, or pet in 178 events (89 percent). The Arlo Pro 5 cloud AI scored 93.5 percent in the same test. The Ring 3D motion scored 92 percent.
The accuracy gap is small and the on device design has 2 advantages. First, it works without internet. Second, the AI processing happens on the camera so there are no per camera AI fees.
Total cost of ownership: the value case
Over 3 years:
- Eufy Solocam S340: $219 up front, no subscription. Total $219.
- Arlo Pro 5: $199 up front plus $4.99 per month subscription. Total $379.
- Ring Stick Up Cam Pro: $179 up front plus $5 per month basic subscription. Total $359.
If you want 4 cameras the gap widens significantly. The Eufy is by far the cheapest 3 year ownership.
App polish: the trade off
The Eufy Security app is functional. Live view, event history, snapshot, and clip download all work. It is rougher than Ring or Arlo. The video player stutters occasionally when scrubbing, the notification copy reads as machine translated in places, and we logged 4 firmware updates in 8 months that needed manual confirmation rather than running silently.
For someone who values the no subscription advantage and accepts a slightly rougher app, this is fine. For someone who lives in the app daily, the polish gap matters.
Eufy Solocam S340 vs. the competition
| Product | Our rating | Resolution | Sub | Solar | Price | Verdict |
|---|---|---|---|---|---|---|
| Eufy Solocam S340 | ★★★★☆ 4.4 | 3K + 2K | None | Built in | $219 | Best No-Subscription |
| Arlo Pro 5 | ★★★★☆ 4.3 | 2K | $4.99/mo | Accessory $79 | $199 | Top Pick |
| Ring Stick Up Cam Pro | ★★★★☆ 4.2 | 1080p HDR | $5+/mo | Accessory $49 | $179 | Runner-up |
| Wyze Cam OG | ★★★★☆ 3.5 | 1080p | For events | No | $29 | Skip |
Full specifications
| Resolution | 3K wide (3072 x 1728), 2K telephoto |
| Lenses | 2 (135 degree wide, 8x telephoto) |
| Field of view | 135 degrees wide |
| Night vision | Color via spotlight, IR fallback |
| Audio | Two way with noise cancellation |
| Connectivity | Wi-Fi 2.4 and 5 GHz |
| Battery | 13,400 mAh integrated |
| Solar panel | Integrated, 2.6 W rated |
| Weatherproofing | IP67 |
| Local storage | 8 GB built in, expandable via HomeBase 3 |
| Warranty | 1 year manufacturer |
Should you buy the Eufy Solocam S340?
The Eufy Solocam S340 is the wireless security camera to buy if you refuse to pay a monthly subscription. The dual lens design (3K wide and 2K telephoto) gives you both wide coverage and detail at distance, the integrated solar panel keeps the battery topped up year round, and on device AI handles person and vehicle detection without a cloud subscription. It is more expensive up front at $219, the app is less polished than Ring or Arlo, and HomeKit support requires the HomeBase 3.
Frequently asked questions
Is the Eufy Solocam S340 worth $219 in 2026?+
Yes if you refuse to pay a security camera subscription. Over 3 years the no subscription savings ($180 to $300) more than offset the higher up front cost vs Arlo or Ring. The dual lens design adds real value for properties where you need both wide coverage and zoom detail.
Eufy Solocam S340 vs Arlo Pro 5: which?+
Pick Eufy for no subscription, integrated solar, and dual lens design. Pick Arlo for better night color, faster app, and broader smart home integration. Eufy wins total cost of ownership, Arlo wins polish.
How does the integrated solar panel actually perform?+
In our 8 month test in mixed Northeast weather (3 winter months, 5 mild months), battery has stayed above 78 percent the entire time. We have not manually charged the unit since installation. In sustained heavy cloud cover (December into January) battery dropped to 78 percent before recovering.
Does on device AI work without internet?+
Person and vehicle detection runs on the camera itself. Notifications still need internet to reach your phone. Local storage to the built in 8 GB keeps recording even if internet is down. We confirmed this in a 36 hour internet outage test.
How does the dual lens design work?+
The wide 3K lens captures the full 135 degree field. The 2K telephoto can zoom 8x but only at preset positions you configure in the app. It is excellent for monitoring a specific spot (driveway entrance, package drop zone) while keeping the wide coverage.
📅 Update log
- May 10, 2026Added 8 month long term notes and solar performance through 1 winter.
- Jan 25, 2026Updated on device AI accuracy after firmware v1.2.4.
- Sep 12, 2025Initial review published.
David Lin
David Lin writes for The Tested Hub.