solar panel 1. Different types:Mini, Round, Small, Big 2. Monocrystalline silicon 3. Polycrystalline silicon 4. High quility solar panel PV panel cell power: 30w size:535*505*25 weight:3.7kg FEATURES:1,High module conversion efficiency, through superior manufacturing technology 2,Guaranteed -1% to +3% power tolerance3,Entire module certificated to withstand high wind loads and snow loads4, ...