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Price per watt ($/W) allows for an apples-to-apples comparison of different solar quotes that may vary in total wattage, solar panel brands, etc. The price per watt (PPW) of a solar system is the price that the homeowner will pay for every watt of solar being installed.Ĭalculating the price per watt for a solar system is very straightforward - it’s simply the gross system cost (contract value) divided by the number of watts in the system. Let’s dive a little further into each measurement.

Cost per kilowatt-hour (cents/kWh) is useful for comparing the cost of solar versus grid energy.Price per watt ($/W) is useful for comparing multiple solar offers.There are two main ways to calculate the cost of a solar system:

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There has never been a better time to install solar! How To Calculate Solar Panel Cost Utility-scale solar installations are now cheaper than all other forms of power generation in many parts of the world and will continue to replace older, dirtier power plants run on coal and natural gas.Īdditionally, homeowners are now able to own their power production more cost-effectively than ever before. Just like computers, big-screen TVs, and cell phones, the economies of scale that solar panels now enjoy have produced a dramatic cost curve that has fundamentally changed the energy industry. Since 2010, solar panel prices have fallen by roughly 90% while global solar deployment has grown by over 400%, and this incredible growth rate along the entire global solar supply chain has dramatically reduced prices. The cost of solar panels has declined substantially over the last decade as the industry has matured and reached production at the largest global scale. Get multiple quotes from our vetted installers. In this article, we’ll take a look at why solar panel cost has fallen so dramatically, the key terms for evaluating the cost of solar systems, and the many factors that will ultimately impact the price you pay for your solar system.

That said, solar panels are only one component of a complete solar system, so there are other solar installation costs to consider as well. The recently extended 30% solar tax credit makes the deal that much sweeter. The cost of solar panels has declined dramatically over the last decade, and solar systems now offer more value to homeowners than they ever have before.