... Approval: CE, GS, TUV, EMC, ROSH,UL The up and down structur can maximize the utilize of sunshine, reduce the shadow ... -15%~+15%of ratin voltage7.Protection functions:Open circuit and short circuitprotection functions available.8.Easy installation:Easy to hang ... years, joined in many international fairs, communicated with many growers and counterparts like Philips, GE, EYE, GAVITA,LIGHTS INTERACTION.etc ...