Average Size and Cost of a Solar System

Actually, there is no average size or cost of a solar system.

This is because the size depends on how much power your household consumes.

As a rough estimate, if your electric bill is about $50/mo, you would need about 3 kW of solar to offset the majority of your electrical usage. A 3 kW system can range between $6,000 and $9,500 (after tax credit) depending on site conditions and equipment installed.

For a $100/mo electric bill, you would need around 5.5 kW of solar, ranging from $10,500 to $16,500.

For a $200/mo electric bill, you would need around 11.5 kW of solar, ranging from $21,000 to $33,600.

These price ranges are large because the size and components of each system have different variables. Some variables include:

  1. How much electricity you consume (as shown above).
  2. How much space you have available for mounting panels.
  3. The amount of shade on your panels throughout the day.
  4. Roof orientation, or how close to south-facing the panels will be.
  5. Cost differences between brands of solar panels and inverters.
  6. Cost differences in mounting panels on the roof versus mounting on the ground.

We’ll then be able to show you the investment required to produce as much as 100%, or even as little as 10%, of your electrical power needs.

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