For safety reasons, an uninterrupted power supply is needed during the construction phase and longer maintenance periods for obstacle lights and pumps. Power demand obstacle lights: Between 50 and 100 W Power demand pumps: Approx. 25 W
During construction and maintenance work, no grid access is available but operation safety for obstacle lights and pumps still has to be guaranteed. Autonomy of up to three months is required, resulting in high service and operating cost for batteries and generators and high maintenance effort.