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Start saving in four simple steps.

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See if you are eligible for the program, if not, join the waitlist below!

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Download the National Grid Charge Smart app from the Apple Store or Google Play Store.

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Use the timer on your charger or vehicle to schedule charging during off-peak hours.

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Earn a rebate for every kWh of off-peak charging you do and watch your savings accumulate.


The Charge Smart MA platform requires vehicle telematics or network connected home charger. Check the dropdown list to see if your vehicle or hardware is currently compatible.

  • Audi
    e-Tron (2019+), Q4 e-Tron (2022+), A5 PHEV (2022+),A7 PHEV (2021+), A8 PHEV (2019-2021)
  • BMW
    3 Series PHEV (2016+), 5 Series PHEV (2017+), 7 Series PHEV (2017+), i3 (2014-2021), i3 (+Rex) (2014-2021), i8 (2014-2021), X3 PHEV (2020-2021), X5 PHEV (2016+)
  • ChargePoint HomeFlex Charger
  • Chevrolet (OnStar Subscription Required)
    Bolt EUV (2022+), Bolt EV (2017+), Volt (2011-2019), Spark EV (2014-2016)
  • Chrysler
    Pacific Hybrid (2017+)
  • Ford
    C-Max Energi (2013-2017), Mach-e (2021+) 
  • Jaguar
    I-Pace (2019+)
  • Land Rover
    Range Rover (PHEV) P400e (2019-2021), Range Rover Sport (PHEV) P400e (2019-2021)
  • Tesla
    Tesla Model X (All Models), Tesla Model Y (All Models), Tesla Model S (All Models), Tesla 3 (All Models)
  • Volkswagen
    e-Golf (2015-2020)
  • Volvo
    XC60 PHEV (2018-2021)
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Download the app and enroll in the program

  1. Download the National Grid Charge Smart app.
  2. Verify your National Grid account.
  3. Connect your vehicle or charger using your existing manufacturer login details to enroll in the program.
  4. For technical support contact
Get it on Google PlayDownload on the App Store

Charge off-peak and watch your rebates accumulate

Track all of your charging, estimated energy bill costs, and off-peak rebates in the app.
App screen displaying rebate info

You Have Choices

National Grid EV customers have two choices to help with the cost of EV charging.  This program, MA EV Off-Peak Charging, provides rebates to customers for moving their EV charging on a daily basis from peak demand times to off-peak demand times.  The ConnectedSolutions EV and PHEV Program provides customers with annual incentives to pause their EV charging during system peak events during the summer months.  Customers are eligible to participate in only one program at a time.


Vehicle or charger not supported?

Fill out the form below to be notified as we add new vehicles and chargers to the program.
Please be advised that this program is for Massachusetts National Grid Residential electric service customers.


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Frequently asked questions

National Grid’s off-peak window from 9:00 p.m. to 1:00 p.m. is  when demand for electricity is at its lowest, meaning that EV owners that charge off-peak are helping reduce the cost of charging and improving resiliency for the electrical grid. Additionally, when demand for electricity is lower, National Grid can utilize more carbon-free resources to provide electricity. Off-peak charging is more affordable, reliable, and green!

To login to the Charge Smart MA app, you will need to connect to your National Grid profile. If you do not have an existing National Grid profile, you will need to create one and connect it to an existing Massachusetts or Nantucket Electric Company account.  If there is an existing National Grid profile for your electric account; but you do not control it, you will need to register for access.  You can do either of these directly from the updated Charge Smart MA mobile app or on the National Grid login page.  Once you have the National Grid profile you can return to the Charge Smart MA app login screen and login. 

Once you download the Charge Smart MA app on your mobile device, we’ll ask you to connect to your electric vehicle (EV) or home charger using the username and password on your compatible EV or home charger account. This uses the same process, called OAUTH2, as you might have used to log into a website using your Facebook or Gmail account. Your EV must have telematics capability in order to actively participate.  Please see Complete Compatible Model list above.   

Read-only charging allows and National Grid to view your vehicle’s charging. We will take a reading of your EV’s battery level then calculate how many kWh of charging are done during National Grid’s off-peak times.  Your charging is not controlled through this program.

If you've bought a new car since signing up, you can easily change your vehicle details by following the steps below.

  • Open the app and navigate to the Account tab.
  • Underneath "Your car", tap the "Car details" button.
  • You'll see information about your vehicle. To change or update, tap "Update car"
  • Tap the available options to update your make, model and trim.
  • Tap "Save changes"

Your car will now be updated on our system.

We do not see or store your EV and/or home charger username and password. Once you enter your username and password, we instantly exchange them with the vehicle and/or home charger manufacturer for a secure token that allows us to be able to continue to access your account to optimize your charging throughout the program. This token is stored securely and encrypted in’s cloud platform, hosted by Amazon Web Services.

National Grid’s partner,, will take a reading of your EV’s battery level then calculate how many kWh of charging are done during National Grid’s off-peak times.  National Grid will then use this data to award rebates based on your charging behavior.

The off-peak rebate is paid as a fixed per-kWh rate for charging your EV during the hours of 9:00 p.m. to 1:00 p.m. Monday through Friday, excluding the National holidays of: New Year’s Day, Washington’s Birthday, Memorial Day, Independence Day, Columbus Day, Labor Day, Veteran’s Day, Thanksgiving Day and Christmas Day. All holidays will be the nationally observed day. 

Participants are eligible to receive a reward of $0.05/kWh for EV charging during off-peak hours from June 1 to September 30 (“summer months”) and $0.03/kWh for EV charging during off-peak hours from October 1 through May 31 (“non-summer months”).

National Grid combines your charging data with that of all the other program participants and aggregates it into a set of metadata that is stored on’s secure servers, which are hosted by Amazon Web Services.

MA EV Off-Peak Charging Program participants will receive their rebates for charging during off-peak times as a credit on their following months' electric bill.  Participants can elect to receive their rebates via PayPal by emailing

Participants are eligible to receive a reward of $0.05/kWh for EV charging during off-peak hours from June 1 to September 30 (“summer months”) and $0.03/kWh for EV charging during off-peak hours from October 1 through May 31 (“non-summer months”). The rebates are calculated for each calendar month and administered to customers on the 2nd Friday of the following month. For example, if you earned $10.00 for charging your EV during off-peak hours during the month of January, you would see a $10.00 credit applied to your bill on the second February in Friday. If your billing cycle occurs prior to the second Friday for a given month, the rebates are then applied on the subsequent month’s bill.

Regardless of if you are connecting to the Charge Smart MA app via a home charger or your EV, providing National Grid with this information helps us accurately report your charging data in-app, as well as effectively respond to any inquiries or questions about your charging experience. However, you will only need to connect one piece of compatible hardware to participate in the program.

You are free to stop participating in the program at any time, simply disconnect your vehicle from the Charge Smart MA app and email us to confirm your withdrawal from the program at

Once you disconnect your EV, we will no longer be able to read the charging on your vehicle. Any data from previous charging sessions will be combined with other customers’ data. The aggregate data will be analyzed by National Grid to assess the benefits of the program.  You will need to re-enter your login details to reconnect to the platform.

You can enroll a maximum of two EVs or one home charger in the MA EV Off-Peak Charging Program.

The Charge Smart MA app is currently configured to officially support only one EV per account. We understand that some households may have multiple EVs and fully intends to support more than one EV on the same account in the future. In the meantime, it is possible to connect more than one EV to your Charge Smart MA account if both vehicles are connected to the same OEM account (e.g., two Teslas connected to the same Tesla account; two Chevrolets connected to the same Chevrolet OnStar account). If you have two vehicles on separate OEM accounts, please create two separate Charge Smart MA accounts with two separate e-mail addresses. Please note that both email addresses will have to be connected with your National Grid profile (see above FAQ). As a reminder, the Massachusetts Off-Peak Rebate Program only allows two vehicles per household.