Solar energy is not only sustainable, it is renewable and this means that we will never run out of it. It is about as natural a source of power as it is possible to generate electricity. The creation of solar energy requires little maintenance. Once the solar panels have been installed and are working at maximum efficiency there is only a small amount of maintenance required each year to ensure they are in working order. They are a silent producer of energy. There is absolutely no noise made from photovoltaic panels as they convert sunlight into usable electricity. There are continual advancements in solar panel technology which are increasing the efficiency and lowering the cost of production, thus making it even more cost effective. During operation solar electricity power plants produce zero emissions. The utility companies are notorious for their fluctuating and unreliable electricity prices. There is clearly an upward trend.With solar panels and simple math, we can calculate how much electricity will be generated, and most importantly, at what price, for at least the next 20 years (fixed energy costs)..