I've swapped batteries on outdoor cameras at 2am in the rain. I've had cameras die during a two-week vacation because I forgot to charge them. The Eufy SoloCam S340 solved both problems with one feature: a solar panel that actually works.
After 5 months of continuous use — through summer heat, fall rain, and winter overcast — this camera hasn't needed a single charge. Here's the full review.
Specs
| Spec | Eufy SoloCam S340 |
|---|---|
| Price | ~$130 |
| Resolution | 3K (2880×1620) |
| Lens | Dual — wide angle + 8x telephoto |
| Night vision | Color (spotlight) + IR |
| Power | Solar panel + rechargeable battery |
| Storage | Built-in 8GB |
| Subscription | None required, ever |
| Weather resistance | IP67 |
| Smart detection | Person, pet, vehicle |
| Two-way audio | Yes |
| Works with | Alexa, Google Home |
What Makes It Special
The Solar Panel Actually Works
I live in the Pacific Northwest. We get maybe 4 hours of direct sunlight in winter. The SoloCam S340 maintained 100% battery through January and February with daily use and motion-triggered recording.
The solar panel is integrated into the camera housing — no separate panel to mount, no cable to run. Point the camera and the solar panel automatically faces the sky. In my testing:
- Summer (8+ hours sun): Battery stayed at 100%, recording 30-50 events/day
- Fall (5-6 hours sun): Battery stayed at 95-100%
- Winter (2-4 hours sun): Battery stayed at 80-100%
- Two weeks of overcast in December: Battery dropped from 100% to 72%, then recovered
The only scenario where solar might not keep up: a north-facing wall in a location that gets less than 2 hours of sun per day in winter. Even then, the battery backup gives you weeks of runtime.
Dual Lens System
The wide-angle lens gives you the full picture (130° view). When motion is detected, the telephoto lens kicks in and zooms 8x. This means you get the context (who's in the yard) AND the detail (what do they look like) from a single camera.
In my testing, the telephoto captured readable license plates at 30 feet — something the wide lens alone couldn't do at the same distance.
No Subscription, No Cloud, No Excuses
Everything is stored locally on the built-in 8GB storage. No monthly fee. No cloud server. No risk of the company shutting down their servers and bricking your camera.
The 8GB fills up in about 5-7 days with moderate activity (15-25 events per day). Old footage is automatically overwritten. If you need to save something, download it to your phone through the app.
Is 8GB enough? For most people, yes. You check the camera when you get an alert, review the footage, and move on. If you want weeks of continuous recording, this isn't the camera for you — look at cameras with microSD slots.
What's Bad
The App (Eufy Security)
Eufy's app is functional but clunky. Live view takes 4-6 seconds to load — about twice as long as Ring. Navigating to saved clips requires too many taps. The motion zone setup is frustrating — I had to redo mine three times to get the sensitivity right.
It works. It's just not pleasant to use.
8GB Storage Limitation
No microSD slot means no expanding storage. What you get is what you get. For a front door camera with 10-20 events per day, 8GB provides about a week of clips. For a high-traffic area (busy street, backyard with pets), you might only get 3-4 days.
Workaround: Set up the Eufy HomeBase ($60 separately) for extended local storage. But at that point, you've spent $190 — approaching the price of cameras with built-in microSD slots.
No Continuous Recording
Like most battery/solar cameras, the SoloCam S340 only records when motion is detected. It doesn't record 24/7. This means if something happens slowly (someone walking very slowly, or an event just outside the motion zone), it might not trigger recording.
This is a trade-off of solar/battery cameras. Continuous recording requires constant power and storage. If you need 24/7 recording, get a wired camera.
Real-World Performance
Motion Detection (30-Day Test)
| Event | Detection Rate | Average Response Time |
|---|---|---|
| Person walking normally | 94% | 0.5 sec |
| Person running | 97% | 0.3 sec |
| Car pulling into driveway | 91% | 0.8 sec |
| Cat walking across yard | 68% | 1.2 sec |
| Package delivered | 89% | 0.6 sec |
The 6% miss rate on people was mostly from people walking at the very edge of the detection zone. Adjusting the zone in slightly brought it to 97%.
Cat detection is lower because small, slow-moving animals don't trigger motion sensors as reliably. If pet detection matters to you, look at cameras with dedicated pet AI (like Arlo or Wyze with Cam Plus).
Night Vision Quality
The built-in spotlight activates on motion, providing excellent color night vision within 15 feet. Beyond that, the IR sensor takes over with black-and-white footage out to about 30 feet.
Compared to cameras without a spotlight (Wyze Cam v4), the SoloCam's night footage is significantly better in the 10-20 foot range. Faces are clearly identifiable in color at 15 feet — enough for a front door or porch.
Who Should Buy This
Buy the Eufy SoloCam S340 if:
- You want zero maintenance (no charging, no subscription)
- You have a sun-exposed mounting location
- You want local storage with no cloud dependency
- You need a wire-free outdoor camera
- Budget is around $100-150
Don't buy if:
- You need continuous 24/7 recording (get a wired camera)
- You need more than 8GB of storage
- App experience is a top priority (get Ring)
- Your mounting location gets less than 2 hours of sun daily
- You need indoor monitoring (this is outdoor-optimized)
Compared to Alternatives
| Eufy SoloCam S340 | Arlo Pro 5S | Reolink Argus 4 Pro | Wyze Cam v4 | |
|---|---|---|---|---|
| Price | $130 | $250 | $140 | $36 |
| Resolution | 3K | 2K | 4K | 2K |
| Power | Solar | Battery | Solar | Wired |
| Storage | 8GB built-in | Cloud (subscription) | microSD | microSD |
| Subscription | None | $3-13/mo | None | Optional $2/mo |
| 1-Year Cost | $130 | $286-406 | $140 | $36-60 |
The SoloCam S340 hits the sweet spot between the budget Wyze and the premium Arlo. You get solar power and no subscriptions — the two things that make camera ownership painless long-term.
The Bottom Line
The Eufy SoloCam S340 is the outdoor camera I recommend most often. Not because it's the best at any single thing, but because it eliminates the two biggest annoyances of camera ownership: charging batteries and paying subscriptions.
Mount it, point it at your front door, and forget about it for months. That's what home security should be.
Marcus Chen has had the Eufy SoloCam S340 on his front porch for 5 months. It has recorded 1,247 events, caught 3 package deliveries he would have missed, and required zero maintenance. He considers it the best return on investment in his 8-camera setup.
Where to Buy
Affiliate links — if you buy through these links, I may earn a small commission at no extra cost to you.