... is strongly promoting the use of today's society, green renewable energy products.System Voltage: DC12V/24V Suitable power source: 5W ~ ... 20W energy saving lamp, high power LED, etc. Working day: 6 ~ ... high conversion efficiency, life ≥ 25 years Batteries: solar energy for colloidal silicon energy, lead-acid batteries, life ≥ 5 years Controller: ...