11. Starting in 1929, all newer panel systems were deployed as battery cut-off ( BCO ) systems. 12. In 2011 a 47 kW photovoltaic solar panel system was installed on the roof of the school. 13. But from the beginning the panel system handled seven-digit numbers ( later eight ), for two reasons. 14. The Rotary switches were smaller than the Panel system , and served only 200 rather than 500 stations. 15. The panel system was designed to interconnect the offices of a city or a local calling area. 16. Composite systemsExamples of composite and unusual systems include steel-panel systems , steel truss-systems, fibreglass systems and geodesic domes. 17. It has recently installed largest hybrid solar system in Australia with an 170KW panel system and additional batteries. 18. The panel system also strengthened the ideology of democracy within the NEA The composition of panels became politically important. 19. The company secured a loan covering 100 percent of the cost of a 250-kilowatt solar-panel system for its rooftop. 20. They do so through the installation of solar panel systems and battery storage systems, providing power throughout the day.
