All enrollees in Flex Batteries will receive

• A one-time enrollment incentive equal to $75 per kWh of battery storage, up to $1,000 maximum per battery.
• $.50 per kWh up to $500 per battery for your participation during Flex events.

You will receive your enrollment reward in the form of a check within 4-6 weeks after enrollment and receiving a completed W9. Then, 4-6 weeks after the close of the summer season, you will also receive payment by check for your participation incentives (capped at $500 per battery, per year)

Flex Batteries is administered on behalf of PSE by Uplight, overseeing program implementation, payment processing, and customer support. Enrolled customers can manage their accounts through the FlexSaver portal provided by Uplight For the fastest assistance, you can contact Uplight's customer support directly at support@pseflex.com or by calling 1-888-793-9347.

Enrolling your battery requires that your home be equipped with AMI (Advanced Metering Infrastructure), the current standard for metering technology that facilitates two-way communication between meters and PSE. As part of PSE’s Meter Upgrade Project, nearly 2 million meters in our service area were upgraded to AMI between 2018 and 2023. For more information, please visit the Meter Upgrade Project.

Enrollment in Flex Batteries is currently accepted from:

• Enphase
• Franklin WH
• SolarEdge (including qualified LG batteries paired with SolarEdge inverters)
• Tesla

You can download a detailed list of the current eligible systems here. If you have a question about your battery equipment eligibility, please contact the Flex Batteries team at support@pseflex.com.

PSE is actively seeking more battery manufacturer partners and more options might be available in the future. PSE will update this webpage as more eligible battery manufacturers become available.

To participate in the program, your battery must be interconnected with PSE’s grid. If your battery is paired with solar, learn more about interconnecting with PSE on PSE’s Customer Connected Solar page. If you have a storage-only battery system, learn more about interconnecting on PSE’s Distributed Renewables page.

If you don’t already have a battery installed, start by installing an eligible battery.

1. Contact an installer

• Find a PSE Recommended Energy Professional who will help you with installing your battery
• Your installer will work with you to purchase an eligible battery

2. Install and interconnect your battery system

• Your installer will work with you to install and interconnect your battery
• Once your battery is fully installed, has an interconnection agreement with PSE, and is online, you will be able to enroll in Flex Batteries

3. Enroll your battery and begin to participate in events and earn rewards

If you already have a battery installed, is your battery interconnected?

Yes: Enroll your battery and begin to participate in events and earn rewards

Unsure: Confirm with your battery installer, a PSE Recommended Energy Professional, or contact der@pse.com with your name, account number, and address, and we can help.

No: 

• Do you also have solar?
Contact your installer to submit a modification to your existing solar interconnection application.


• Do you only have a battery?
Contact your installer to submit a new interconnection application or visit our online portal to begin an interconnection application on your own.

Enrollments for Flex Batteries are processed weekly, but the occasional enrollment can slip through the cracks. If your enrollment has been pending for longer than a week, please contact us at der@pse.com.

Yes, if your household has multiple eligible batteries, you can receive an enrollment reward for each of them.

Are your new batteries interconnected with PSE? If so, please contact the Flex Batteries team at support@pseflex.com to enroll your additional batteries. If not, please contact your installer to submit a modification to your existing solar or battery interconnection application. Once you’ve received Permission to Operate with the modified system, please contact support@pseflex.com.

A battery customer may not participate in Time-of-Use at this time due to billing complexities. We are working to change this in the future. Learn more.

Yes. For information and resources to learn more about installing solar at your home, please visit Customer Connected Solar.

Yes. You can enroll other qualified smart devices in PSE Flex Smart and Flex EV.

However, if you are signed up for Flex Rewards already, you will need to unenroll to participate in Flex Batteries.

If you would like to remove your battery from Flex Batteries and no longer participate in events, please contact support@pseflex.com.

Our experts can predict periods with heightened demand for electricity based on a range of different criteria, which we call “Flex events.” For example, a Flex event might occur on a day with weather hotter or colder than normal, when we tend to use more energy to heat and cool our homes and businesses.

With collective action from the community, we can prevent spikes in energy usage that strain the grid and ensure there is enough energy to go around.

When PSE schedules an event, your device might receive an automatic command to charge up from your solar or from the grid ahead of the event. When the Flex event starts, your battery system will automatically start to discharge over the duration of the event. You do not need to do or change anything to participate in the event.

If your home or neighborhood is currently experiencing an outage such that your battery is already discharging to back up your home, your battery will automatically be excluded from the scheduled Flex event

Through Uplight’s integrations with the participating manufacturers, PSE can schedule events that send automatic commands to the participating devices. These commands take into account the current status of the device, including state of charge. Devices will never be discharged less than 20% of the battery’s capacity.

Flex events will only occur during the hours of 6 a.m. to 10 p.m. and will never take place on holidays (see list below).

• Winter events can occur from November 1 to March 31
• Summer events can occur from May 1 to September 30.
• PSE may call upon your battery up to 50 times per season, or 100 per year.

Holidays:

• New Years
• Memorial Day
• Independence Day
• Labor Day
• Thanksgiving
• Christmas

No, events are structured such that the battery response is automatic and you do not need to do anything.

By default, you will not receive a notification of your battery’s participation during a Flex event from Uplight or PSE. However, you may receive a notification from your battery manufacturer, depending on your battery setting.

If you would like to receive a notification from PSE, please contact Uplight’s customer support directly at support@pseflex.com or by calling 1-888-793-9347.

By default, you will not have the option to opt out of a Flex event. However, you may opt out of events as supported by the device manufacturer.

Your ability to withstand an outage is important to Flex Batteries, so there are a few protections in place:

• The number of Flex Batteries Events is limited. This reduces the probability that a Flex Event coincides with an outage.
• As stated above, if your home or neighborhood is currently experiencing an outage such that your battery is already discharging to back up your home, your battery will automatically be excluded from the scheduled Flex event.
• Flex Events are human controlled. At PSE our meteorologists and system operators are constantly vigilant about outage risk. If we feel the risk of an outage is high, we will likely defer calling a Flex Batteries Event.
• Weather matters. Outages tend to occur during blustery frontal passages. Blustery weather is not usually associated with high grid demand. High grid demand tends to happen before and after weather fronts during quiescent periods of very hot or very cold temperatures. The relationship between weather and grid demand makes the probability that a Flex Event coincides with an outage low.

If you have solar panels and a qualifying battery, you can participate in both Flex Batteries and PSE Net Metering. The combination solar and battery system will need to be approved through our interconnection process. Then, through net metering, you can use or store the solar power you generate. At times when your solar panels generate more power than you can use or store, the excess energy will be sent to PSE's grid and you'll receive net metering credit. Learn more.

Participating in Flex Batteries should have a minimal impact on your Net Metering credits or energy costs. Here's why:

• Any energy your battery system exports to the grid during Flex events is credited to your Net Metering bank, just like solar exports
• When your batteries recharge after an event, that energy is either drawn from your Solar, Net Metering bank, or purchased from PSE - the same way your regular Net Metered billing works
• Battery storage isn't perfectly efficient - most systems are 90% to 95% efficient - for every kilowatt-hour your battery discharges it needs about 1.1 kilowatt-hour to recharge.
• For the average customer, that extra 0.1 kilowatt-hour equates to roughly $0.14 per Flex Event, or $8.40 over the course of 60 Flex Events

Remember:

• During a Flex event, you use stored battery energy instead of grid power to power your home
• The purpose of Flex events is to shift when you use the energy, not to use more overall
• Shifting the energy use of Flex Batteries customers to different times helps relieve demand on the electrical grid.

In the winter:

• The same principles apply, but depending on your system settings, your battery may use PSE’s grid to recharge more frequently because solar isn’t as plentiful
• You may not accrue a Net Metering Bank and deplete it just as you would without participation in Flex Batteries

Think of it this way - whether you use energy directly from the grid or from your batteries during a Flex event and under ideal conditions, you'll use nearly the same total amount of energy. Flex Batteries simply helps PSE manage when that energy is used while providing you additional incentive payments for participating in Flex events.

Yes, you can still participate in Flex Batteries with a storage-only system as long as it is an eligible system and is interconnected to PSE’s grid. When your battery sends energy back to the grid during events, your meter tracks this contribution, and PSE credits it back to your monthly bill. This ensures that you are not billed twice for the same energy—once for using it and again for sending it back during events.

If you're installing a storage-only system and want to participate in the Flex Batteries program, the installation process is similar to Net Metering, and you'll still need to work with an installer and apply for interconnection. Visit PSE’s Distributed Renewables page to get started.

If you’re installing a storage-only system for back-up power only and not interconnected to PSE’s grid, PSE offers installation guidelines.

If you’re installing a battery that is not interconnected to PSE grid, we strongly encourage installers and our customers to report their standalone battery installations throughout our service area by filling out and submitting this online notification form.

By sharing your information, you’ll help PSE properly manage the services that we provide to all customers on our grid. You will also help us evaluate further opportunities to support customers’ battery storage installations.

If you are planning to operate your storage-only system in parallel with PSE's grid (e.g., if your battery can provide energy to your load at the same time as the grid), then PSE requires that you have an interconnection agreement. Learn more about interconnecting at a storage-only system on PSE’s Distributed Renewables page.

Yes! Residential batteries are a vital part of PSE’s clean energy goals. In August 2025, Flex Batteries had more than 5 megawatts and 10 megawatt-hours of residential customer batteries enrolled and that number is growing. Having 5 megawatts of Flex Batteries capacity available for Flex events helps PSE smooth out our distribution system peak demand and reduce the need for less-efficient sources of power.

Home battery systems can be a significant investment. A basic system can start at $15,000. Depending on your home energy needs, required electrical upgrades, permits, and installation costs, the final cost may be higher.

Incentives for enrolling and participating in the programs are considered taxable income. As such, Uplight will collect W-9s from all participants before processing incentives so that Uplight has the necessary information to issue 1099 forms in January. The tax implications for each participant will depend on individual circumstances and we recommend you discuss with your tax professional.

W-9 forms will be stored securely with restricted access and used only for the purpose of issuing the 1099 forms.

Log into the Trade Ally portal to review more FAQs. You may also reach out to our Trade Ally team for assistance at tradeallysupport@pse.com.

PSE is working on battery storage in a variety of local scenarios to determine the best ways they can potentially enhance the grid and meet our customers’ unique energy needs. Learn more.

You can find answers to additional frequently asked questions related to battery storage technologies on our Battery Storage FAQ page.

Still have questions? Please contact our Energy Advisors.