All our LiFePO4 batteries are rigorously tested to insure functionality and assure customer satisfaction for years to come. Our Solar panels are the perfect match for our batteries and are multifunctional as well as long lasting. The new ExpertPower 2k and 3k Inverter Charger 2 in 1 combo device is perfect for combining our batters are solar panels together making it a cohesive and reliable system. Rest assured that your solar kit is ready out of the package and comes with a 1 year no-hassle warranty and life time support.