solar panel alarm

DIY Solar Panel Alarm: How to Protect Your Panels from Theft with the Mobeye CM-Guard

solar panel theft: roof without its solar panels
What’s left after a solar panel theft

Solar panels are a significant investment — and an increasingly targeted one. As solar panel theft continues to rise across the UK and Europe, having a reliable security system in place is no longer optional.

The Mobeye CM4000 CM-Guard provides a straightforward solution. This battery-powered 4G alarm immediately alerts you if someone tampers with or attempts to remove your solar panels. Installation takes around twenty minutes and does not require professional assistance.

Why Solar Panel Theft is a Real Risk

installing solar panels

PV panels are bolted to rooftops or ground mounts with standard fasteners. A theft can take just a few minutes. Once panels are gone, you are left without energy production and facing replacement costs that far exceed the value of any stolen hardware.

The Mobeye CM-Guard addresses this directly. A conductive wire loop threads through or around your panels. If that wire is cut or broken during an attempted theft, the CM-Guard sends an immediate SMS or call to your mobile phone via the 4G network. No internet connection required.


How the Mobeye Solar Panel Alarm Works

The system is straightforward: a conductive wire loop connects to the Mobeye CM-Guard unit. If the wire is cut or broken during an attempted theft, the system sends an instant notification to your mobile phone via the mobile network, allowing you to respond at once. Powered by long-lasting batteries (lasting over a year), the device ensures uninterrupted protection. Additionally, it notifies you when the battery is running low.

What You’ll Need

  • Mobeye CM-Guard (optionally with IP66 outdoor enclosure for exposed installations): a battery-powered 4G alarm communicator with two NO/NC inputs
  • Conductive wire: insulated copper wire or similar conductive material

How to Install Your Solar Panel Alarm

Time needed: 20 minutes

To create a solar panel alarm, follow these straightforward steps:

  1. Install the Conductive Wire

    During solar panel installation — or as a retrofit — thread an insulated copper wire through the panel frames or mounting brackets to form a complete loop. The wire should pass through every panel in the array. If the loop is broken at any point, the alarm triggers. Use a wire gauge robust enough to resist casual cutting but thin enough to route discreetly through the mounting structure.

  2. Connect the wire to the Mobeye CM-Guard

    Attach both ends of the wire loop to one of the CM-Guard’s two inputs. Set that input to “normally closed” (NC) mode. In this state, the system monitors for any break in the circuit — the trigger condition for an alert.
    The Mobeye CM-Guard CM4000 is the control unit and alarm dialer for monitoring any technical installation.

  3. Configure your alert settings

    Add at least one phone number to receive notifications. Send the following SMS command to the device:
    1111 TEL1:07123456789 (replace with your number)
    The CM-Guard will now contact you by SMS or call the moment the wire is broken.

  4. Position the Device

    Place the CM-Guard in a dry, sheltered location close to the panels. For rooftop or outdoor ground installations exposed to rain and weather, use the CM-Guard with the IP66-rated outdoor enclosure. The device runs on long-life batteries lasting over a year and sends a low-battery notification before power runs out.

Frequently Asked Questions

How does a solar panel alarm work?

The CM-Guard monitors a conductive wire loop threaded through your panel array. If the wire is cut or broken during a theft attempt, the device immediately sends an SMS or makes a call to your registered number via the mobile network.

Can I install the Mobeye CM-Guard myself?

Yes. No electrician or alarm engineer is required. The installation involves routing a wire, connecting two terminals, and sending one SMS command. Most users complete the setup in under 20 minutes.

How long does the battery last?

Battery life exceeds one year under normal conditions. The CM-Guard notifies you automatically when the battery is running low.

Does the alarm need an internet connection?

No. The CM-Guard communicates entirely over the 4G mobile network, making it suitable for rooftops, fields, and any location without Wi-Fi.

Will it work for ground-mounted or off-grid solar systems?

Yes. The CM-Guard works for any PV installation — rooftop, ground-mounted, or off-grid — as long as there is mobile network coverage at the location.

Protect Your Solar Investment

The Mobeye CM-Guard is a straightforward way to know immediately if your solar panels are tampered with. Install it once, and it runs for over a year without attention.

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