According to our data, 80% of local authorities who have installed a speed indicator device prefer the solar option for its convenience and energy efficiency.Power source options:Solar connection: The solar-powered radar speed sign is fully self-sufficient, equipped with two backup batteries and powered by a 95-watt photovoltaic panel, ensuring continuous power all year round.Electric: The radar speed display can operate on a constant electric current or connect to the public lighting network, with a minimum requirement of five hours of nightly charging.Dual power: This option integrates both solar and electrical connections, ensuring a dependable backup power source. If solar power is insufficient due to low levels of sunlight, the system can switch to electric power. Similarly, solar power can act as a backup if the public lighting network fails to provide the necessary five hours of charging.Batteries: The system includes two batteries and an external charger, providing between seven and ten days of autonomy.