German Quality! Solar modules: *****0W Power consumption: ****5W Inverters: 0, 2 - 5, 4 kW power system Controllers: ***0A Free-maintenance batteries: 9, ****0Ah The system with low solar module can make two pieces of 7W energy saving lamps work 5 hours per day. The system with high solar module can make colorful TV or other **0V AC load work **6 hours per day. Cloudy days: **5 days.