Majority of the system usually do not include the battery storage that lets power in once the utility does not work. Grid-tie systems are installed using battery backup power to maintain critical loads even in the presence of a power failure. The Full Stand-Alone The complete or full stand-alone system is very useful for complete independence from electric utility companies and fossil fuels. You can take advantage of the features by choosing the right type and maximizing the effect right in your own home. About Solar Solar power is described as the creation of electricity straight from the sun. The generation can be direct with the use of PV or photovoltaics or indirect via CSP or concentrating solar power. government actually spends a lot of money on paying off the energy consumed by these hot water heaters, about $13 billion every year, possibly making it the single biggest energy consumer in your home or work place. Solar energy systems used on hot water heaters can actually help you save a considerable percentage on your utility bills, over 85% of the total electric water heating cost of your home. It is important that you weigh the potential of having your own setup. You should consider the things you need to power, your location, budget, etc. Here are some more details about the energy. On Availability The good thing about solar energy is that it can be used anytime or as long as the sun exists. According to Energy Type The second means of viewing solar energy relies on the kind of energy that it converts into. There are 3 kinds that belong in this category namely photovoltaic solar power, solar thermal energy and concentrating solar power. Active solar space heating is done to heat the air within the house. If you think that setting up and maintaining the system will be difficult, it might be better to wait until the technology is more rampant in your area. About Budget Solar cell systems are generally costly in the beginning. Later on, you will realize that the costs will start to go down, since the energy stemming from the sun is free and available all the time.