I recently bought a BlueSolar PWM Charge Controller LCD&USB 12/24-5. Now, I'm using it with a 20 Wp solar panel and a 12V/24Ah VRLA battery. It's going well. But I have a question.
Sometime, on the LCD display, the left arrow, the one between the solar panel and the battery (also called "charging symbol" in the manual) is blinking. Moreover, there seems to be two different blinking speeds. I didn't found any explanation. So, what does the blinking of the charging arrow means?