System Size and Design

Learn how to best size your solar system

Understanding Your Usage and Sizing Your System


Understand Your Energy Needs:

We recommend that you take a moment to review your current energy usage and consider what your future energy usage may be. Whether you have people moving in or out, plan on electrifying your appliances, or upgrading an electric vehicle, your energy usage may change from what it is today.


Our goal is to design the perfect solar system to produce just the right amount of energy to meet your needs and even a bit extra when it makes sense.


For the most accurate information, we recommend getting the exact annual kilowatt hour (kWh) data directly from your utility provider.


Understand Optimal Panel Location:

Using your electrical usage data, we will build a custom solar proposal for your home, showing the location and number of panels needed to offset your electrical usage


Placing panels on South-facing roofs is generally recommended whenever possible for maximum efficiency. East and West facing roofs are the next most optimal, and North roofs can be viable in some but not all situations.


Sizing Your System:

It is recommended to size your system based on 100% of your previous year's usage, if possible. It is also beneficial to size a bit larger, with permission from your utility company, to accommodate any potential increase in usage in the future.


If you cannot fully cover your power needs with solar energy, even partial coverage can still provide benefits compared to relying solely on the utility company for all your power needs.


What is the Average-Sized Solar System?

Average Solar System Size per Region:

  • Northern California: 6.7 kW system size
  • Central California: 7.4 kW system size
  • Southern California: 7.3 kW system size
  • Arizona: 8.8 kW system size
  • Florida: 10.9 kW system size
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Last updated on December 1, 2023