1000W Solar Kit (4PCS 250W) from Newpowa. Only for 12V Solar Systems. Designed for off-grid solar applications such as RVs, Van Conversions, and other applications. $1416.00 with Free Shipping for Domestic Orders (48 States). We offer a 2yr limited material and workmanship, 10yr 90% output, 25yr 80% output warranty for the Solar Panel, and a 1yr limited material and workmanship warranty for the Charge Controller.