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Generally, every square foot of roof space has the potential to generate about 15 watts of solar energy. Thus, a solar panel installation on a small home might only need around 200 square feet of roof space, while a larger home can require more than 1,000 square feet of roof space to properly offset electricity usage.
Solar panels are made to last more than 25 years. In fact, many solar panels installed as early as the 1980s are still working at the expected capacity.
Monocrystalline solar cells are more efficient because they are cut from a single silicon source. Polycrystalline solar cells are blended from multiple silicon sources and are slightly less efficient. Thin-film technology costs less than mono or poly panels but is also less efficient.
Solar panels do not need direct sunlight to work. Even though maximum efficiency is reached when the sun is shining, electricity is still produced on cloudy days and during winter. On the other hand, no electricity can be produced at night, but a storage system can solve this problem.
To get the full cost-saving benefit of solar power, it's best to keep your panels relatively clean and free of debris. Dust, dirt, pollen, bird droppings, and leaves can all take their toll on your solar system's performance. Regular cleaning can do wonders to improve its efficiency.
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