Installing The Best Battery Storage Options

Northwest Electric and Solar offer battery backup installations in Washington State – installable with a solar PV system or alone. We offer Tesla’s Powerwall with Tesla Gateway and are in the process of expanding our offers to SolarEdge’s Energy Bank as well as Enphase’s IQ Batteries.

Your home battery backup system can provide clean, reliable power during a utility outage, replacing the fossil-fuel-burning generator. It does not pollute the air and does not require you to keep combustible gasoline or diesel on hand. A solar system automatically shuts down without battery storage during a power outage.

Suppose you already have solar energy or get a solar system simultaneously as your battery. In that case, the solar-connected battery backup installation is eligible in Washington State for the Federal Income Tax Credit. Purchase and installation on the solar system is state sales tax exempt, but you will have to pay sales tax on the battery backup system.

Using Battery Backup

Backup Power

Switching over to battery power is automatic the instant the utility grid goes down. The seamless transition has no ill effects on your electronics and appliances. When the grid comes back, another seamless transition switches you back. The battery will then automatically recharge from grid power or recharge from your solar energy system during daylight.

Self Consumption

Clean electricity from your battery is solely used for self-consumption. In Washington, you cannot send battery power to the grid for net metering credits as you do with solar electricity.

Load Shifting

In the future, if your electric utility goes to “time-of-use” rates, you can save money when you use battery power during the most expensive rate periods and charge the battery up during less costly periods. Battery storage can offer financial benefits in California, where electricity during peak hours is costly or when a customer pays a high “demand charge.”

Home Backups

A partial backup works great for anyone looking to back up just a few critical loads. We’ll install a small subpanel and relocate up to 10 loads (every 30 amps and under) into this panel, which will have power during an outage. If you want to run your microgrid at your home, a Whole Home Backup is the option for you. Keep everything in your home powered during an outage!


Tesla Powerwall Battery System

Each Tesla Powerwall Battery system consists of one or more 13.5 kW rechargeable lithium-ion battery packs, an integrated inverter, and software housed in a Gateway that intelligently dispatches electricity. Powerwall mounting can go on the wall, floor, indoors, or outdoors. They can be placed adjacent to each other or stacked front to back.

System size (number of Powerwall batteries) depends on the size of your solar system, the electric loads you want to run when the grid goes down, and the length of time you need to power them. We take care of everything from design and permits to testing and teaching you how to use them.

The solar battery backup installation takes 1 to 2 days for a Washington State residential system, longer for a more extensive procedure. When the installation is complete, our electrician will test the system. We will turn off-grid power to simulate a power outage and train you to use the Powerwall cell phone app. Watch a short video showing the energy flow in How Powerwall Works. Quantities are limited, so reserve yours today!


Zero-Down Low-Cost Loans Are Available

Local credit unions offer special low-rate loans for solar energy, battery backup, energy efficiency, electric vehicle, EV chargers, and more—fast approval with online application and electronic signing. You get the lowest rate (depending on your credit score) because NWES is an approved solar panel installer in Washington State. Loan terms are between borrower and lender. Check out our Lending Institution For Green Projects article to learn more!