Depending on the application requirement, solar power, mains power provide the system at the same time, made up the formation as shown above. When the solar— Cell panel under the normal power supply condition, the Solar controller go through the inverter and provide the load use it(mains power as standby), and then charge the battery; When the solar— Cell panel do not have the power supply capacity(night, cloudy days and rainy days), the system automatic switch to mains power, go though system regulator provide the load use it; Just only the mains power and the solar— Cell panel under the abnormal condition, the system enable use the battery energy, go thought system inverter provide the load use it.ide the load use it.de the load use it. System function: Extreme charge system, after the battery discharge, and then run into the cloudy days and rainy days, the system will be automatic go though mains power charging. Make sure the battery use age and the security of the system provide power supply. Output overload, short circuit, over voltage protection Surge, C-class lightning protection system(option) On-line maintain, repair function 1.2, products introduction: 1)At the day time, the normal sunshine enough and the mains power under the normal condition: Solar-cell panel go though solar controller adjust to max power supply state, and go though inverter provide load use it(mains power as standby), , and then charging the battery(as shown below) 2)Night( cloudy days and rainy days no sunshine), mains power under the normal condition; System automatic turn to mains power, go though system regulator provide load use it. (as shown below) 3)Night( cloudy days and rainy days no sunshine), mains power under the abnormal condit ion; System will be use the battery energy. Go though system inverter provide load use it. 4)Night( cloudy days and rainy days no sunshine), after discharge the battery, and the Mains power recover: The system turn to mains power, go though system regulator provide load use it. And then start using system charger, charging the battery in time(as shown below) 1)The machine overload, not opening or before open 15 second, system will be automatic turn to by pass provide power supply. Frena FONG/ Mr GuangDong EAST Power Co., Ltd No. 6 Northern Industry Road, Songshan Lake SCI & TECH industry park, Dongguan City, Guangdong Province, China 52380852380823808 ---------------------------------------------------------------------------------------------------------------------------- Tel: +86 769 228 977 77-8181 Mobilp: 0086 158 1846 1875 More detail, pls vist: http://www.eastups.com Working Hrs: 08: 00 - 11: 50, 13: 40-17: 50 (Monday To Friday)