Its sustainability and low environmental impact are major advantages, but there are challenges, such as intermittent sunlight, land use needs, and the scarcity of materials. . Geographic and Site Conditions Remain Critical: Success with solar heavily depends on roof orientation, shading, and local climate conditions—systems in sunny locations like Phoenix can generate 40-60% more electricity than identical systems in cloudier regions. The 30% Federal Tax Credit Window Is. . Solar energy is one solution for combating climate change and reducing our dependence on fossil fuels. But, for a complete picture, it's important to consider both the pros and cons of solar panels. With an estimated 173,000 terawatts of solar energy continuously hitting Earth's surface (1), there is more than enough energy to meet the world's current consumption levels of 15 terawatts per year (2). Solar energy is a clean and renewable source of power that converts sunlight. . Renewable and abundant source of energy As long as the sun exists (barring a very unexpected supernova explosion or the untimely arrival of an alien species from another galaxy with technology to absorb our sun's gases), solar energy is a 100% renewable and inexhaustible resource to fuel the. .
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