What is the cause of the solar street light at night can't discharge

Recently had a customer response to us: solar street light in the dark without light, want to learn about this what to make of it. Solar street lamps factory is given here the following reply: if you have installed solar street lamps, and normal use for a long time,

recently, a customer to reply us, solar street light in the dark without light, he wants to know what happened. Here, the solar street lamps manufacturer gives the following answer: if the solar street light has been installed and normal use for a period of time, first check the response of the controller lights. If the two indicator is on, the controller may be damaged. In this case, the system could be affected by the impact of the strong current, such as direct lightning or short circuit. If it is found that the light on the solar street lamps controller shows normal discharge at night, check you have enough voltage of battery, but not bright lights, we suggest that will be directly connected to the battery solar street lamps are negative is negative for testing. If there is no evidence of a discharge in this test, the light drives or rectifier may be damaged, it is recommended to use a professional universal instrument for further testing. Solar street lamps controller shows undervoltage state, after dark is not bright, but the battery voltage is more than under voltage value, indicates that the battery has electricity. For 24 v systems, under-voltage protection values of about 22. 2 volts ( The controller default) 。 When the battery down to the point voltage, the controller shut off the power and stop discharging, mainly in order to prevent excessive battery discharge, affect the subsequent use of equipment. Solar street light panels to recharge the battery during the day, only when the charging voltage 24 v ( The controller default) , the battery will continue to discharge. The main purpose of this setting is to prevent cell damage due to long time depth discharge. If the solar street light controller when the battery voltage not restart, 22. Between the 2 v and 24 v voltage of undervoltage, only when the battery charge voltage to 24 v solar street lamps above discharge will continue.