Camera Comparison · UK 2026
eufyCam S4 vs eufyCam E40

Specs, pros and cons compared side by side

Both the eufyCam S4 and the eufyCam E40 are solar battery cameras. This head-to-head sets them side by side using the specs, pros and cons from our full reviews. eufy specs come from eufy’s own product pages.

Quick verdict

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eufyCam S4

Pick it for: Fixed 4K bullet plus a 2K PTZ that tracks and zooms (the E40: 2K 4MP, 130°) · Works without a HomeBase, with 32GB built in (the E40 needs a HomeBase 2 or S380) · Detachable 5.5W solar panel (the E40: built-in 0.7W)

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eufyCam E40

Pick it for: Works with Apple Home (the S4: HomeKit not currently supported) · Rated IP66 (the S4: IP65) · Works with HomeBase 2 (the S4: not HomeBase 2 or Mini)

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Quick comparison

Spec eufyCam S4 eufyCam E40
Resolution 4K bullet + 2K dual-lens PTZ, 8x hybrid zoom 2K 4MP, 130°, F1.0; MaxColor Vision + infrared
Power 10,000mAh swappable battery; detachable 5.5W solar; USB-C Battery with built-in 0.7W solar; external solar supported; 24/7 on direct power
IP Rating IP65 IP66
Wi-Fi 2.4GHz only Not stated by eufy
Storage 32GB built in, microSD up to 256GB, HomeBase S380 16GB on HomeBase; up to 16TB (S380) or 256GB (HomeBase 2)
Apple HomeKit Not currently supported (eufy FAQ) Yes (HomeBase 2 needs firmware v3.3.6.9+)
Smart home Alexa and Google Assistant Apple Home, Alexa and Google Assistant
eufyCam S4

Pros

  • Wide view and a tracking close-up in one camera
  • Works without a HomeBase
  • Swappable battery and solar panel
  • 24/7 recording when wired

Cons

  • 2.4GHz Wi-Fi only
  • 24/7 recording needs direct power
  • Some features need HomeBase S380
  • eufy’s FAQ says HomeKit is not currently supported
eufyCam E40

Pros

  • Built-in solar
  • 24/7 recording when wired
  • Works with Apple Home
  • Works with HomeBase 2 or S380

Cons

  • Needs a HomeBase
  • Face recognition needs HomeBase S380
  • Power cable for 24/7 sold separately
  • eufy does not list Wi-Fi details

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Which should you buy?

Why choose the eufyCam S4

  • Fixed 4K bullet plus a 2K PTZ that tracks and zooms (the E40: 2K 4MP, 130°)
  • Works without a HomeBase, with 32GB built in (the E40 needs a HomeBase 2 or S380)
  • Detachable 5.5W solar panel (the E40: built-in 0.7W)
Why choose the eufyCam E40

  • Works with Apple Home (the S4: HomeKit not currently supported)
  • Rated IP66 (the S4: IP65)
  • Works with HomeBase 2 (the S4: not HomeBase 2 or Mini)

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