If a solar street light controller is damaged, the problem can be resolved by inspecting, repairing, or replacing the controller in sections. Meanwhile, troubleshooting the supporting equipment and wiring is necessary.

Common Causes of Controller Failure

1. Environmental Factors: Water ingress into the controller can cause a short circuit (common when installed inside a light pole);

2. Installation Errors: Reverse polarity of the solar panel, loose wiring connections, or poor contact;

3. Equipment Aging: Damage to internal circuit components or program failures in the controller;

4. Abnormal Voltage: Excessive solar panel output voltage or unstable battery voltage.

Controller Repair or Replacement Steps

1. Power off and inspect:

2. Disconnect the solar panel, battery, and load.

3. Observe the status of the controller indicators (both off and on are abnormal).

Functional Test:

1. Use a multimeter to measure the battery voltage (a fully charged battery should be ≥12V).

2. Check whether the solar panel open-circuit voltage is higher than the battery voltage.

Replacement Procedure:

1. Select the same or compatible controller model as the original (must match the system voltage).

2. Reconnect the controller in the following order: solar panel → controller → battery → load. ‌‌

‌ Channels for Obtaining Controllers‌

1. Manufacturer Purchase: Contact the street light manufacturer to obtain the matching controller (we recommend contacting the customer service number in the product manual). ‌‌

2. E-commerce Platforms: Search for "solar street light controller" on JD.com or Taobao, and filter by wattage (e.g., 30W/60W) and voltage (12V/24V). ‌‌

3. Specialty Markets: Lighting wholesale markets or solar equipment stores can conduct on-site compatibility testing.