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Why is My Security Camera Losing Power Only at Night?

  • Writer: Administrator A
    Administrator A
  • Jan 19
  • 3 min read

Why is My Security Camera Losing Power Only at Night?

It’s one of the most baffling problems in home security: your cameras work perfectly all day, providing a crystal-clear feed, but the moment the sun goes down, they go offline. You check the app, and it says "Device Offline" or "No Signal," only for the camera to magically "fix itself" the next morning.

This isn't a ghost in the machine—it’s a classic symptom of power insufficiency. Here is why your camera is failing the night shift and how to fix it.

The Main Culprit: Infrared (IR) LEDs

The biggest difference between a camera's daytime and nighttime operation is the Infrared (IR) Illuminators.

Most security cameras have a ring of small LEDs around the lens. During the day, these are turned off. However, when the light sensor detects darkness, it triggers these LEDs to provide night vision.

  • The Power Spike: Turning on these LEDs can double or even triple the amount of electricity (amperage) the camera requires.

  • The Result: If your power supply is only providing just enough energy for daytime use, the extra "pull" from the IR lights will cause the camera to starve for power and reboot or shut down entirely.

Day vs. Night Power Consumption

Component

Daytime Draw

Nighttime Draw

Image Sensor

Active

Active

Processor

Active

Active

IR LEDs

OFF

ON (High Draw)

Mechanical IR Cut Filter

Locked

Engaging

Total Load

Low

High

2. The "Voltage Drop" Phenomenon

If you have a long cable run (over 50–100 feet) between your power source and the camera, you are likely experiencing voltage drop.

Electricity loses strength as it travels through a wire.1 While a 12V power adapter might send 12V into the cable, resistance in the wire might mean only 10.5V arrives at the camera.


  • The daytime threshold: Many cameras can function on 10.5V when the load is low.

  • The nighttime crash: When the IR lights kick in, the increased demand causes the voltage to drop even further (perhaps to 9V). At this point, the camera’s internal computer "browns out" and shuts down.

3. Aging Power Adapters

Power adapters are like batteries; they degrade over time. An adapter that provided a steady 2 Amps three years ago might now only be capable of 1.2 Amps.

As the internal components (capacitors) age, they lose their ability to handle "peak loads." This is why an older system might suddenly start failing at night even though it worked fine for years.

4. Poor Cable Quality (CCA vs. Copper)

If your system was installed using cheap Copper Clad Aluminum (CCA) cables instead of Pure Copper, your cameras are much more likely to fail at night. Aluminum has higher resistance than copper, making voltage drop significantly worse once the night vision demands more current.

How to Troubleshoot the "Night Blackout"

  1. The "Hand Cover" Test: During the day, cup your hands tightly around the camera lens to simulate darkness. If the camera clicks and then immediately loses video, you have a power supply issue.

  2. Short-Cable Test: Take the "failing" camera down and plug it directly into the power supply using a short 3-foot patch cable. If it works all night while sitting on your desk, your long-distance wiring is the problem.

  3. Upgrade the Adapter: Replace your standard 1.0A adapter with a 2.0A or 3.0A adapter. Providing more "headroom" in amperage often solves the nighttime reboot loop.

  4. Adjust Settings: If your camera software allows it, try lowering the "IR Intensity." If the camera stays on with lower IR settings, it confirms the power draw was too high for your current setup.

Professional Security Solutions in Cleveland

Troubleshooting power issues—especially those involving voltage drop and wire gauge—can be dangerous and frustrating without the right tools. If your "blind spots" are happening when you need security the most, it’s time to call in the experts.

Cleveland Security Cameras provides professional-grade diagnostics and hardware upgrades. We ensure your power distribution is calculated correctly so your cameras stay on through the darkest nights.

Get in Touch

 
 
 

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