Product arrived fast but the performance on each of the 4 ETFE panels is so low that it is false advertisement: Voc and Isc are as low as the advertised Vmp and Imp, and the Fill Factor is so low that the Peak Power is only ~58% of the 100Wp advertised! Even after a long process of testing in several MPPT setups and providing all possible evidence, the seller still pretends that the problem is external and refuses to refund anything. -> AVOID or be aware you only buy 60Wp panels from a dishonest seller! Moreover one panel arrived damaged on the corner, in a non damaged packaging: -> absence of the most basic quality control!