The regulator operates automatically, turning on and off as required to charge and maintain the leisure battery. When the solar panel is exposed to a source of sunlight the regulator starts to operate. When the voltage from the panel reaches a usable level, the Panel Output LED will flash indicating that the battery is being charged (see battery charging below). If insufficient power is being generated by the solar panel the regulator will turn off. The regulator checks the solar panel output ever 30 seconds and turns on / off as required.
On overcast days when the solar panel output is minimal the regulator can still deliver a small charge, and in this mode the LED’s are not illuminated to conserve power.