... countries 4.New product development ability APV Pure Sine Wave Inverter, Solar Charger APV solar charger is a combination of APC ... and AC auto-transfer switch into one complete system,made inverter not only connect with solar system,also could be used ... , we have CE, SONCAP, GOST, UL(pending) .off grid solar inverter lntegrating research & development, production and marketing, Yiyuan Electric Co., Ltd ...