Connect Solar Panel to Relay: Connect the positive output of the solar panel to the common (COM) terminal of the relay. Connect the normally open (NO) terminal to the positive input of the charge regulator. The negative wire of the solar panel goes directly to the negative input of the charge regulator.

Relay Control: Use a control circuit (e.g., a microcontroller or a voltage sensor) to activate the relay. This allows the relay to switch on when charging is needed.

Connect to Charge Regulator: Connect the charge regulator’s output to the battery, ensuring correct polarity.

Safety Check: Double-check all connections for correct polarity and secure fitting to avoid short circuits.

For quality components, you can get them from reliable solar panel suppliers in UAE like Yellow Door Energy, SirajPower, and Sunergy Solar.