hot sale 3000w small solar system

hot sale 3000w small solar system,  this system not only have solar power system function , but also have Utility complementary function. When main power off , the solar system can switch automatically to take use off solar power from battery to run load, When solar power not enouch and power off  , it can switch automatically to main power and connect with grid electricity take use of main power.This is very suitable for home use .