A backup power system basically consists of an inverter/charger and a battery system. Some can be quite small, such as the ones often sold in computer and discount stores that will give you a few minutes to shut down your computer safely. We don't do those. What we can do is design larger backup systems, for homes & businesses, and such things as computer and network systems. How much backup power you may need can vary considerably - ranging from keeping the office computer and server up for a couple of hours, up to large computer and control systems. You might need a 300 watts for a few hours, or 20,000 watts for a day - we can design and furnish those and anything in between. We can also supply the Midnite Solar prewired backup power systems, such as the example shown below. Give us a call or email us for more information.