The maximum withstand voltage fluctuation range of the lighting electrical ready board is based on African national standards and product design specifications, combined with the current situation of large voltage deviation in rural power grids. Its adaptability needs to be comprehensively judged based on equipment specifications and renovation measures. The following specific parameters and specifications are used to explain, taking into account both professionalism and practicality.

According to current African national standards, the rated voltage of conventional lighting electrical ready boards is mostly 220V/380V, and the normal withstand voltage fluctuation range is 80% -120% (i.e. ± 20%) of the rated voltage. This is the core limit of the equipment's own insulation and component tolerance. Exceeding this range can cause damage to internal circuit breakers and other components, and even pose safety hazards. Some of the specialized products can stably adapt to a range of 80% -120%, enhancing their adaptability to complex environments.

For voltage deviations of ± 20% or more in rural power grids, conventional lighting electrical ready boards cannot be directly adapted. Due to the long distance of power supply and high line losses in rural areas, the voltage deviation in some areas often exceeds the normal power supply deviation limit of ± 7% and ± 10% (single-phase 220V), and even reaches ± 25%. If conventional equipment is used directly, high voltage will burn out lighting components, while low voltage will cause the lamps to fail to start normally and have insufficient brightness.

To adapt to extreme voltage deviations in rural areas, a specialized reinforced lighting electrical ready board should be selected, with a tolerance range that can be extended to 70% -130% (± 30%). At the same time, it should be equipped with voltage stabilization devices or dynamic voltage regulation devices to suppress voltage surges and drops.

In summary, the maximum withstand voltage fluctuation range of conventional lighting electrical ready boards is ± 20%, which cannot directly adapt to voltage deviations of ± 20% or more in rural areas. It is necessary to select specialized equipment and install voltage stabilizing devices to meet the needs of rural power grids and ensure the safe and stable operation of lighting systems.