POWER YOU CAN EXPECT 400W is the lab rating (STC); real-world output depends on sunlight heat shade cable length/gauge and the controller—MPPT recommended. LONGER BUILT-IN LEADS 3 m (9.84 ft) MC4 leads reach farther than many short-lead panels often eliminating add-on extensions and extra connectors. Fewer joints = fewer issues. 12V: PARALLEL PRIORITY For 12 V systems choose parallel wiring for smoother charging; use series only with high-input controllers. REPLACES 4×100W One 400W unit means less hardware to buy and wire fewer branch pieces and fewer chances of a poor connection. WEATHER-RESISTANT CONSTRUCTION Tempered glass panel and aluminum frame with a sealed junction box—made for outdoor rain/splashes in yard settings. MOUNTING FRIENDLY Pre-drilled holes align with common Z-brackets rails and tilt mounts for sheds and greenhouses. IF DAMAGED WE'LL SORT IT Check upon delivery. Should a panel arrive damaged send us a message via Your Orders for a fast resolution. -