How to Install a Solar Charge Controller in Your Caravan

Installing a solar charge controller is essential to safely charge your caravan’s 12V AGM or lithium battery from solar panels. The controller manages voltage and current, preventing battery overcharging or deep discharge.

? What You’ll Need

• Solar charge controller (PWM or MPPT)

• Solar panel(s)

• 12V battery (AGM, Gel, or Lithium)

• Battery cables (appropriately sized)

• MC4 connectors and/or terminal lugs

• Inline fuses or circuit breakers

• Screwdriver, multimeter, and wire stripper

• Safety gear (gloves, eye protection)

⚠️ Safety First

• Turn off all power sources before installation.

• Never connect a solar panel directly to a battery without a controller.

• Use fuses or breakers on both battery and panel sides.

? Step-by-Step Installation

1. Mount the Controller

Choose a dry, well-ventilated area near your battery for mounting. Avoid direct sunlight or heat sources.

2. Connect the Battery First

Important: Always connect the battery before the solar panel.

• Connect the controller's battery terminals to the 12V battery using properly sized cables.

• Positive to positive, negative to negative.

• Install an inline fuse on the positive battery cable, close to the battery terminal.

3. Connect the Solar Panels

• Ensure the panel is not in direct sunlight or is covered.

• Connect solar panel positive and negative to the corresponding solar input terminals on the controller.

• Use MC4 connectors or terminal lugs as appropriate.

• Add a fuse or breaker on the solar input line if not built into your controller.

4. Optional: Load Output Connection

If your controller has a load output, you can connect small 12V devices directly here. This is optional and not necessary if you're running everything through the battery system.

5. Power On and Test

• Uncover the solar panel.

• The controller should power up and begin charging the battery.

• Use the controller display or app (if supported) to monitor voltage, current, and battery status.

6. Secure and Finalize

• Use cable ties or clamps to tidy up wiring.

• Double-check all connections for tightness and safety.

• Monitor the system regularly to ensure stable operation.