Sol-Ark SA-12K-EMPKIT is the best Inverter on the market and priced so everyone can afford it. Sol-Ark ‘s Engineers know how important it is to have power so they have created a “No Loss Transfer Switch” so you will always have power and not even notice the transfer. Sol-Ark SA-12K-EMPKIT All-In-One design cuts install time in half. A user-friendly wiring area and remote monitoring built-in. By partnering with our battery partners, Sol-Ark works to optimize the life of any battery; Sol-Ark works with all batteries.