Solar modules combined with batteries and inverters provide reliable emergency power to telecom cabinets during grid outages. Battery storage, especially lithium iron phosphate types, offers long life and safety while supporting continuous telecom operations. This is where solar powered emergency call boxes prove their value. What Are Solar Powered Emergency Call. In addition to standard analog and SIP compatible blue light towers, GAI-TRONICS offers wireless solar and cellular call stations. Solar call stations are an option if power isn't available, but a telephone. Many operators now choose solar-powered solutions instead of diesel generators for greater resilience and sustainability.