30 x 400W Rigid Solar Panel Combo. Fast Charging - Thanks to its high efficiency of up to 23%, the 400W module charges your LFP batteries faster than solar panels of similar size. Weatherproof and Durable - The rigid panel combines aesthetics with robust materials, allowing it to withstand any weather while providing the same excellent performance and appearance for years. Off-Grid Solution. This high-performance solar module is suitable for both grid-tied and off-grid solar systems. It can store energy for power outages, reduce electricity bills, or power a home off the grid. Universal Compatibility. The 400W solar module comes with a 3.3 ft (1 m) long MC4 cable, giving you plenty of flexibility to maximize sunlight exposure. With an MC4 connector, the rigid 400W module is compatible with other solar systems and third-party power stations.