Solar panels must be chosen for the right
The solar panel must choose a suitable open circuit voltage and working voltage. If the PWM solar street light controller is used, charging 12V, the open circuit voltage of the solar panel is generally around 20V, and the working voltage is generally 17.5V. If charging 24V, the open circuit voltage and working voltage of the solar panel is twice as high as 12V. If the MPPT solar controller is selected, the open circuit voltage of the solar panel must not exceed the maximum input voltage of the controller.
Solar panels
1, in the type of solar panels and divided into monocrystalline and polycrystalline. Monocrystalline silicon solar panels are more efficient, light attenuation is small, but expensive, polycrystalline silicon solar panels are relatively low efficiency, but low prices.
2, solar panel size, appearance size specifications, must be based on their own street light installation environment to decide what size is more appropriate, in general, the same power, choose a smaller size more appropriate.
3, the solar panel's power generation capacity and light intensity, ambient temperature, installation angle, etc. are closely related. Changes in each link will affect its power generation effect.
4, raw materials, battery components generally include cells, eva, backsheet, aluminium alloy frame, tempered glass several parts, if the use of poor quality cells, it will produce irregularities, defects in the lamination process, copper tin copper bending, tightening phenomenon; and will produce bubbles, which proves that in the 160 degrees high temperature heating and sealing process will still produce residual voids, the cell is very important sealing Anti-oxidation, otherwise in the open air is 1-2 years of service life, including the filling of the border gaps, which are very important aspects of the process.
