Too solar led street light price can Yang street light panels voltage higher than the storage

At the time of installing solar street light, many friends don't know why the voltage panels of 17. 5 v and the battery voltage is 12 v. We know that solar panels are made up of 36 cells in series, the voltage of each cell is 0. 5 v, 36 cell



in the installation of solar street light [ Solar street light is a crystalline silicon solar battery power supply, valve control type sealed and maintenance-free battery ( Gel battery) Store electricity, super bright LED as light source, lamps and lanterns and controlled by the intelligent charging and discharging controller, is used to instead of the traditional public power lighting lamps. 】 When many friends don't know why panels voltage of 17. 5 v and the battery voltage is 12 v. We know that solar panels 【 Solar panels, 太阳能板) Is by absorbing sunlight, the solar radiation through the photoelectric effect or photochemical effect directly or indirectly converted into electrical energy device, the main material of most of the solar panel as the 'silicon', but because of the production cost is larger, so it widely used, we still have some limitations. 】 Is made up of 36 cells in series, the voltage of each cell is 0. 5 v, 36 a piece of string of up to 18 v batteries, generally have a loss, voltage rating is 17. 5v。 And rated voltage is 12 v battery, but after a full charge about 13 v, when the battery voltage is less than 11. Need to charge, when I was 6 v battery itself has a discharge protection, we can know what high voltage to low voltage of charging, a differential pressure can be charged, so the voltage panels around 18 v for charging the battery. When solar street light system is 24 v, solar panels are tied for two pieces with the power to give 24 v battery, in addition to note panels are regardless of series-parallel total power are superimposed, with double of the series voltage of the battery power, double series electric current. Recommended reading: solar street lamps use daily attention