No matter how you slice it, the current in any form is equally useful, regardless of how it is created. Currently there are three types of solar energy systems for residential and commercial applications. The decision on whether or not to use batteries is a huge dynamic in the type system leads to the use of solar energy to power your residence or business.
Of the grid systems are the fashionable choice for home solar power enthusiasts. This type of system combines the use of solar modules, DC-AC inverter and the local utility grid as backup. When your solar energy system produces more electricity than it demands, you can sell extra power to your utility company. When the opposite happens (requires more power than your solar power system can produce) you have gained distinction from the network (Power Company). Many utilities are operating under the law of purchasing power fed into the grid from solar energy systems. This law, however, is not unanimously accepted. Always make sure by checking with the local utility company before connecting solar power systems on the network. Not only that you are required to obtain a permit, but even the technician will have to come by your house and go around the solar system to make sure they meet all required codes.
While the network of linked systems are used to supply electric power grid as backup power, battery backup systems use deep cycle battery bank for energy production during the night time, cloudy days, and should the mains fail. This type of system is more complicated, a little more expensive than grid tie system for added control and the battery-backup system requires a different type of DC-AC power converter to control different types of electrical connections to the local utility grid and battery bank .
The difference between using a deep cycle battery as the supply of power reserves and use the power grid, the additional cost and ability to maintain power at home, when the network is battery life will vary depending on the total size of your power system and length of time that you want as a backup. Typically, three days supply of energy is what most people would need in case of power.Bank batteries can cost anywhere between a few hundred dollars to several thousand, depending on their type and storage capacity. If you do not like the choice of batteries for use, you must go to a professional to work in these areas on a daily basis.
It would be possible to power your home total energy needs off the deep cycle battery, however, the sizing of the battery bank to carry only those items considered essential for survival will keep your overall system costs to a minimum.
