1, the range of ambient temperature change:-40~50℃. The use and life of this ambient temperature must be considered when selecting the light source and various electrical components.
2, due to rain, snow, thunder and lightning erosion and interference, must have a reasonable level of safety protection and lightning grounding.
3, continuous rainy days need solar panels, batteries have enough capacity.
4, the battery at full time voltage can be achieved. 7V, discharge can be reduced to ten. 7V or so, rainy days battery voltage will be reduced to about 10V. In this case, on the one hand to protect the battery through the controller, on the other hand to ensure that the light source at high and low voltage can be reliable start-up and stable work.