HQST 400 Watt 12 Volt Monocrystalline Solar Panel Kit with 40A MPPT Charge Controller Designed specifically for customers new to solar. Easy and convenient to install with pre-drilled holes on panels and Z brackets for fast mounting and securing. Used in various off-grid applications that include 12 and 24 volts arrays, water pumping systems, signaling systems and other off-grid pplications. Great for off-grid applications, such as RVs, trailers, boats, sheds, and cabins. Ideal output: 2000Wh per day; can fully charge a 100Ah battery from 50% in 1.5 hours (depending on the availability of sunlight). Warranty: Panels, 5 years material and workmanship warranty and 25 years power output warranty; Accessories, 1 year material & workmanship warranty. Comes with four 100W 12V monocrystalline solar panels, a 40A MPPT charge controller, a pair of 20 ft 10 AWG daptor cables, four set of Z-brackets, and all necessary mounting hardware.With the 40A MPPT charge controller, you can expand your system up to a maximum of 400W.