Temco 1 Pair MC4 Y Branch Solar Panel 30A Connector MMF FFM Set Wire T Splitter Lifetime warranty. Don't choose a product that will degrade or fail before your panels do. HIGH UV Resistance. Won't degrade in sunlight. Ultra-Low Contact Resistance. Unique spring membrane contact surface in terminal. Waterproof. O-Ring connector and cable gland provide IP67 rating. Silver-plated Copper Terminals outlast and outperform tin-plated models.