Solar power generation is one of the green energy sources developed and utilized globally. In recent years, beyond building large-scale solar power plants, China has invested hundreds of billions of RMB in the development of solar LED streetlights. In just a few years, investments exceeding a hundred billion have been made in the construction of solar LED streetlights, representing a substantial solar photovoltaic industry. Solar LED streetlights do not cause environmental pollution or increase air emissions, but how can we extend their lifespan and minimize component failures? Below are some tips on solar streetlights.
Solar streetlight
systems consist of solar power panels, batteries, charge-discharge conversion circuits, and LED lighting components. Each functional circuit, fixture, or device operates independently and generally works under highly unstable light and thermal conditions daily. Therefore, it is necessary for solar streetlights to have PPTC for overcurrent and over-temperature protection. Various issues need to be addressed as discussed below.
If the intensity of sunlight fluctuates or temperatures vary, the voltage and current conversion circuit will also experience instability and heating during operation, leading to component fatigue and accelerated aging, thus shortening the lifespan of solar LED streetlights. If some solar LED streetlights are subjected to transport vibrations or wiring errors during installation, short circuits may result, preventing normal illumination and potentially damaging devices during production and debugging from wiring short circuits. For the
streetlights
to function effectively, a stable LED luminous intensity is essential for normal roadway lighting.
Electronic circuits can also be used for detection and protection modules to safeguard the circuit. To effectively protect against overheating, overcurrent, and short circuits without replacing fuses or encountering faults after reactivation, PPTC components are recommended. This will ensure that solar LED streetlights operate normally under unstable solar thermal conditions.
PPTC, also known as self-resetting fuses or a thousand-cycle fuse, can be applied to different circuits with varying current, voltage, and temperature stability requirements. By selecting the appropriate model and connecting it in series to the battery, when the temperature or current exceeds predefined limits, the PPTC will瞬间变为低电阻, limiting the circuit current in time and ensuring the protection of the solar LED streetlight system. It can be positioned between the conversion circuit and the LED light; under normal operation, PPTC maintains a high resistance.
Once power is restored or faults are cleared, the PPTC automatically reverts to low resistance, allowing the solar LED streetlight circuit to return to normal operation. The PPTC will not reset automatically without a power outage, preventing issues related to reactivation of faulty loads while resolving the problem of timely protection against overheating, overcurrent, and short circuits without the need for fuse replacement. Therefore, solar streetlights require PPTC for overcurrent and over-temperature protection. Remember this important point!
