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Solar Battery Backup

We all know the inconvenience of losing power during a storm and can imagine the safety risks of longer outages due to natural disasters. By installing battery backup for your home or building, you can maintain a steady flow of electricity during grid outages, providing energy security and resilience.

Cascadia Solar proudly installs grid-tied battery backup systems throughout Jefferson, Kitsap, and Clallam counties on the Olympic and Kitsap Peninsulas in Washington State. We can help you decide whether solar battery installation makes sense for your home, business, or organization. 

Benefits of Battery Backup for Your Home

Solar battery installation has many benefits, especially when you pair your battery system with residential or commercial solar panels.

Backup Power During Outages

A solar battery will provide emergency backup power to keep some or all of your appliances and devices running during a power outage. 

Greater Energy Independence

With a solar battery, you’ll rely less on the electric grid and become more self-sufficient in your energy needs.

Smaller Carbon Footprint

Solar batteries are a cleaner emergency backup power source than gas generators, which burn fossil fuel and must be refueled continuously.

Solar Battery Incentives

Battery storage systems qualify for the 30% federal solar tax credit. If you install solar panels with your battery, your system will also be exempt from state sales tax.

How Solar Battery Storage Works

Solar batteries store electricity for later use. There are three types of solar battery backup systems: 1) grid-tied solar panels with battery backup, 2) standalone solar batteries, and 3) off-grid solar PV systems with batteries.

Grid-Tied Solar Panels with Battery Backup

Grid-tied solar batteries connect to a grid-tied solar panel system. They work by storing electricity generated by your solar panels, which creates a bank of stored energy that can be used during a power outage. 

Without backup battery storage, grid-tied solar systems cannot continue to operate if the grid goes down, and you will lose access to your solar power. Backup batteries are a perfect complement to grid-tied solar, unlocking your power when you need it most. If burning fossil fuels isn’t how you want to power your energy future, a solar-powered battery backup system can be a good alternative to a home standby generator.

Enphase solar battery system installed in home

Standalone Battery Storage Systems

Standalone batteries are not connected to solar panels. Instead, they connect to the main electric grid and can charge from it, creating a bank of stored electricity you can use during a power outage.

Off-Grid Solar PV Systems with Batteries 

Off-grid solar energy systems are not connected to the main electric grid. They are an excellent option for homes and businesses in very remote locations that don’t have access to the utility grid. However, Cascadia Solar does not install off-grid solar PV systems. 

The Best Solar Battery Storage Systems for Washington Homes

A solar battery is a lifeline during a power outage that will help you stay safe and comfortable until the electric grid is back up and running. We install high-quality solar battery storage systems that provide consistent, reliable backup power when you need it most, including: 

  • Tesla Powerwall – Tesla Powerwall solar batteries can provide powerful whole-home backup. We’re proud to be a Tesla Powerwall Certified Installer. 
  • SolarEdge Batteries – SolarEdge batteries are a more affordable option that provides reliable, efficient battery backup for your home or business.
  • Enphase Batteries – Enphase batteries are used with microinverter systems and can be great options for small PV arrays.  


At the end of the day, the best battery backup for your home or building depends on your unique needs, clean energy goals, and budget. We install a wide range of options and will help you choose a battery that makes the most sense for you. We are authorized dealers for a broad range of solar equipment and are not obligated by exclusive sales agreements to push a specific product. We believe that we serve our customers best when we offer a full range of options that results in the best solution at the best price.

Our Commitment to Local Resiliency

Cascadia Solar and Frederickson Electric are committed to being a part of local resiliency efforts in Port Townsend, WA. We love attending the annual All County Picnic, a free event that aims to connect Jefferson County residents and increase emergency preparedness. In addition to having a table each year, we are proud financial sponsors of the event so that it continues to remain free to the public. 

See Our Solar Battery Solutions in Action!