Thanks to the seller, there were consultations, the answers were received. The first parcel was lost somewhere in the open, promptly sent a second time, the questions about the promotion of the parcel answered quickly. The package though came well wrinkled (with controller and inverter, solar panels separately came from Russian warehouse), but inside the box a lot of packing material and controller and inverter are whole. Until I included in the scheme, I will later add how it works.