The Felicity3.5KVA/24V Inverter is a pure sine wave inverter built with transformer technology at a great price. The Felicity Inverter has a reputation of numerous good reviews from thousands of users around the globe. It is a great fit for office or home backup power as well as in a stand-alone (off-grid) Solar installation. This Felicity Inverter is a highly efficient converter of AC to DC and vice versa, making it the ideal companion for the wide range of compatible batteries. Its optimized charging algorithm also ensures a prolonged lifespan for the product.