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Solar energy systems have the added benefits of very high efficiency, durability, and service life – they’re engineered for sustainability. This means fewer replacements and repairs, saving even more energy and precious resources.
A solar panel’s efficiency is measured by the percentage of power the panel converts absorbed sunlight to electricity. Because panels vary in size, the power produced is measured against the size of the panel. For this reason, it’s better to have a smaller panel that produces more energy. It is better to have a 2.5’ x 5’ panel that produces 4.5 kilowatt hours (kW) than a 3’ x 6’ panel that produces the same amount.
Sadly, not all solar panels are created equal. The highest quality panel operates at 42% efficiency. There are panels that produce energy at far lower efficiency rates—most of which are purchased through retail. This is why we don’t recommend building your own system.
Generally speaking, the more you invest up front on a solar panel system, the greater your return will be year after year. Overtime, the higher efficiency panels perform better, giving you a better bang for your buck.