EufyCam S4 & Eufy SoloCam S340 Plus share many similarities, but there are also important differences, such as quality, performance, features, design, and connectivity. If you want the best one between them, I Would recommend the EufyCam S4 rather than the Eufy SoloCam S340 Plus.

Why Do I Recommend The EufyCam S4?
- The Eufy S4 has a 4K fixed bullet camera for capturing finer facial and license plate details at longer distances, while the Eufy SoloCam S340 uses a 3K wide camera.
- he Eufy S4 includes a dual-camera hybrid design with a fixed lens and a PTZ lens for maintaining constant wide coverage while actively tracking subjects, whereas the Eufy SoloCam S340 relies on a single PTZ camera.
- It supports radar plus PIR motion sensing for more precise movement detection and reduced false alerts from environmental motion, while the Eufy SoloCam S340 uses PIR-based detection only.
- The Eufy S4 supports bullet-to-PTZ coordinated tracking to keep moving subjects continuously centered even when they change direction, whereas the Eufy SoloCam S340 performs standard pan-and-tilt tracking only.
- Eufy S4 comes with higher onboard local storage capacity for retaining more video history without overwriting important events quickly, while the Eufy SoloCam S340 has smaller built-in storage.
- It supports 24/7 continuous recording when connected to constant power for uninterrupted surveillance of critical areas, while the Eufy SoloCam S340 records events only due to its battery-based design.
- The Eufy S4 includes a higher-output solar panel for faster recharging and more reliable long-term operation in low-sun conditions, whereas the Eufy SoloCam S340 uses a lower-wattage solar panel.
- Eufy S4 features a removable high-capacity battery pack for quicker maintenance and reduced downtime during extended use, while the Eufy SoloCam S340 has a non-removable internal battery.
Maybe the Eufy SoloCam S340 Plus can make you comfortable because it’s a little bit cheaper than the EufyCam S4. But you have to compromise all the above-mentioned features. Now the Decision is Yours. I hope it was helpful to choose the right one.
Side-by-Side Comparison
| Feature | EufyCam S4 | Eufy SoloCam S340 Plus |
| Camera system type | Bullet + PTZ | PTZ |
| Lens count | Triple-lens | Dual-lens |
| Max resolution | 4K+ 2K+2K | 3K+ 2K |
| Bullet fixed view | Yes | No |
| Telephoto FOV | D46° | Not specified |
| Motion sensing hardware | Radar + PIR | PIR |
| Detection range | PIR up to 30 ft; radar up to 40 ft | Trigger distance 6–8 m; 4–6 m |
| Auto-framing | Yes | Not specified |
| Bullet-to-PTZ tracking | Yes | No |
| Cross-cam tracking | Yes | Not listed |
| 24/7 continuous recording | Yes | No |
| IR night vision hardware | 4× IR LEDs | Not specified |
| Spotlights | 4× LED spotlights | Spotlight |
| Siren rating | 105 dB | Not specified |
| Local storage (built-in) | 16 GB eMMC | 8 GB eMMC |
| Solar panel power | 5.5 W | 2.2 W |
| Battery design | Quick-swap 10,000 mAh pack | Built-in rechargeable battery |
| Wi-Fi standard | 2.4 GHz; 802.11 b/g/n/ax | 2.4 GHz only |
| Operating temperature | -20°C to 55°C | -20°C to 50°C |
| Weather rating | IP65 | Weather protection |
| Price | Check EufyCam S4 Price | Check SoloCam S340 Plus Price |
What Common Both Can Do?
- Outdoor security camera: Both models are designed specifically for outdoor surveillance, allowing them to monitor entrances, yards, and perimeters. This ensures reliable operation in exposed environments.
- Wireless installation: Each camera operates without wired data connections, making placement flexible. This simplifies setup and allows installation in locations without nearby outlets.
- Battery-powered operation: Both cameras rely on internal rechargeable batteries. This allows continued operation during power outages and reduces dependence on fixed wiring.
- Solar charging support: Each model supports solar panels for continuous recharging. This helps extend runtime and minimizes the need for manual battery recharging.
- Pan-and-tilt capability: Both cameras can pan horizontally and tilt vertically. This enables wider area coverage compared to fixed-lens cameras.
- AI motion detection: Each device uses AI-based detection to analyze motion events. This helps reduce unnecessary alerts from non-relevant movement.
- Human detection: Both cameras can identify people specifically. This improves alert relevance and helps users focus on meaningful security events.
- Vehicle detection: Each model supports vehicle recognition. This is useful for monitoring driveways or street-facing areas.
- Local video storage: Both store recordings locally rather than relying solely on cloud storage. This improves privacy and allows access without ongoing fees.
- Subscription-free recording: Neither camera requires a paid subscription for basic recording features. This reduces long-term ownership costs.
- Full-color night vision: Both models use integrated lighting to capture color video at night. This improves detail recognition compared to black-and-white footage.
- Infrared night vision: Each camera also supports infrared night vision when lighting conditions require it. This ensures nighttime visibility without visible light.
- Two-way audio: Both cameras include microphones and speakers for two-way communication. This allows users to speak to visitors or deter intruders remotely.
- Built-in spotlight: Each device includes an integrated spotlight. This enhances night visibility and can act as a visual deterrent.
- Built-in siren: Both models feature an onboard siren. This allows audible deterrence when suspicious activity is detected.
- Weather-resistant design: Each camera is built to withstand outdoor weather conditions. This ensures reliable performance in rain, heat, and cold.
- Wi-Fi connectivity: Both cameras connect via 2.4 GHz Wi-Fi. This provides stable connectivity over longer distances common in outdoor installations.
- Eufy Security app support: Both models are managed through the Eufy Security app. This enables unified control, live viewing, and alert management.
- Smart alerts: Each camera sends real-time alerts to connected devices. This allows users to respond quickly to detected activity.
Common Features
| Feature | EufyCam S4 | Eufy SoloCam S340 Plus |
| Outdoor security camera | Yes | Yes |
| Wireless installation | Yes | Yes |
| Battery-powered operation | Yes | Yes |
| Solar charging support | Yes | Yes |
| Pan-and-tilt capability | Yes | Yes |
| AI motion detection | Yes | Yes |
| Human detection | Yes | Yes |
| Vehicle detection | Yes | Yes |
| Local video storage | Yes | Yes |
| Subscription-free recording | Yes | Yes |
| Full-color night vision | Yes | Yes |
| Infrared night vision | Yes | Yes |
| Two-way audio | Yes | Yes |
| Built-in spotlight | Yes | Yes |
| Built-in siren | Yes | Yes |
| Weather-resistant design | Yes | Yes |
| Wi-Fi connectivity | 2.4 GHz | 2.4 GHz |
| Eufy Security app support | Yes | Yes |
| Smart alerts | Yes | Yes |
| Price | Check EufyCam S4 Price | Check SoloCam S340 Plus Price |
FAQ
Do both cameras work without a monthly subscription? Are both cameras suitable for outdoor use? Do Eufy S4 and SoloCam S340 support solar charging? Can both cameras pan and tilt to cover wide areas? Do both cameras support AI-based motion detection? Are people and vehicles detected by both models? Is night vision available on both cameras? Do both cameras include two-way audio? Can recordings be stored locally on both cameras? Do both cameras send real-time alerts to a smartphone? Are both cameras wireless for easier installation? Can both cameras be used with the Eufy Security app? Do both cameras include built-in deterrents? Are these cameras suitable for long-term unattended use? |