@ Electricity supply for areas without electricity or non-continuous electricity power supply @ Adopting the advanced micro-computer controller to control recharge and discharge @ Modify wave output voltage of AC220V/50HZ @Function of commercial power complementary with the input of DC12V and AC220V @ High-efficiency crystalline silicon solar module with built-in type @ High reliability and maintenance-free sealed lead-acid battery @ Aluminum alloy box on wheels and bridle rod with convenient mobility @ Maximum output power of 15W @ Continuous working for 12 hours after fully charged