Green Button® Data


GreenButton Logo

With Green Button, Ontario energy customers can easily access information on how they consume energy at their home or business.

There are two types of data downloads:

  1. GREENBUTTON DOWNLOAD MY DATA: Enables homeowners and property managers to download their electricity usage data from an energy service provider’s website in an industry-standard XML data format. Energy customers can utilize this data to view their historical and present energy usage, analyze trends, and make informed energy-management choices. Customers will be required to log into their Online Account in order to access the secure Green Button microsite.
  2. GREENBUTTON CONNECT MY DATA: Allows customers to authorize direct, secure transfer of their energy usage data to third parties that can assist them with easily managing and conserving energy. In addition, due to the use of common, standardized Green Button formats, third-party developers can rapidly create and offer these products, services, and applications.


Log-in to your online account and click on the Green Button link on the top navigation bar to be forwarded to a secure Green Button microsite for GREENBUTTON DOWNLOAD MY DATA.


Connecting your Data will require that you sign-up with a 3rd party. NOTL Hydro will post links to 3rd party authorized providers below, however, we do not recommend or endorse any 3rd party. NOTL Hydro is not responsible for 3rd Party data loss. Additional terms and conditions apply.

  • Oct 13, 2023 – No current Third Parties Available


Third Parties who wish to be registered and onboarded onto the Green Button Platform to be showcased as an available application in our Green Button marketplace will be required to submit a registration form. Once submitted, our technical team will be in touch with the next steps. We look forward to connecting customers with what you have to offer!

DISCLAIMER – GREENBUTTON CONNECT MY DATA and GREENBUTTON DOWNLOAD MY DATA are registered trademarks owned by the U.S. Department of Energy.

+- What is Green Button data?

Green Button is a data standard that provides energy customers with more choice in how you access your electricity and natural gas data. With a simple and secure process, customers will be able to securely download (access) or connect (share) their energy usage data in an industry-standard format with registered third parties.

+- Why is Green Button data being implemented?

Ontario is providing families and businesses more control over their electricity and natural gas bills with the introduction of the new Green Button Standard that will allow access to their data with a goal of better tracking energy use, reducing bills and saving money. On November 1, 2021, the Ontario Ministry of Energy announced that electric and natural gas utilities across the province must provide their customers with access to Green Button data no later than November 1, 2023.

+- What are the benefits of Green Button data for consumers?

Green Button provides a unified, industry-standard data format, which can be used to analyze and manage a consumer’s energy usage. The introduction of Green Button industry-standard data across Ontario utilities will provide the foundation for the development of new tools and applications for customers to analyze and monitor their energy usage to reduce costs. Below are just a few of the benefits of Green Button data: • Improve energy efficiency – Consumers can use Green Button data to identify and compare their energy usage in order to improve energy-efficiency within their home or business. • Reduce energy costs - By learning their usage patterns and habits, consumers can make informed choices about how much energy they use and when they use it. When consumers use energy during off-peak hours (also known as peak-shaving) and invest in energy-efficient appliances, it saves money and can help reduce strain on the grid. • Energy conservation – consumers can use their data to conserve energy to help reduce their carbon footprint and protect the environment. • Green button tools to understand large volumes of energy data will help pave the way for future innovations in the energy sector. Green Button Data for Residential and Small Commercial Customers: • Many customers are already viewing their energy data through a customer portal on their utility website. With Green Button, third party apps can analyze the data and provide insights to help customers make sense of their energy use and make informed decisions to help reduce costs. • With CMD, data is shared on an ongoing basis. This allows third parties to provide insights and alerts on usage trends and changes. Green Button Data for Businesses: • For customers with a large number of properties across multiple utilities, Green Button provides a standardized format so that the data they receive from each utility is in a similar format. Green Button third parties in the commercial sector are able to analyze large volumes of data across multiple facilities to provide energy management advice. • With CMD, data is shared on an ongoing basis. This allows third parties to provide insights and alerts on usage trends and changes including monitoring the impact of energy efficiency measures taken. • Green Button will also make it easier for facilities to complete mandatory government reporting requirements.

+- What is Green Button Download My Data (DMD)?

The Green Button Download My Data (DMD) standard allows consumers to select-and-download their electricity usage data from their energy provider’s website in an industry-standard XML format; consistent across all energy-provider websites.

+- How do I Download My Data?

From MyAccount: • Log in to your MyAccount portal via Customer Connect • Click the Green Button logo on the main landing screen • Select the Download My Data tab • Follow the prompts to select the data you would like to download • Click Download • An XML file containing your selected data will be download If you do not have an online account, please contact NOTL Hydro Customer Service to request a direct link to the portal.

+- What format will my data be downloaded in?

When you download your data, it will be in an industry-standard XML format. Please note that XML files are designed to be read and analyzed by computer applications, not humans.

+- Once I have downloaded my data, what can I do with it?

When you download your data, you may choose to send it to a third-party vendor yourself or upload it to an application to analyze. As Green Button data becomes widely available across Ontario, more third-party solutions and applications will be developed and made available to analyze the data.

+- What is Green Button Connect My Data (CMD)?

The Green Button Connect My Data (CMD) standard, also referred to as Data Shares is the industry standard for securely authorizing and sharing electricity usage data with registered third-party vendors. With CMD, utility consumers can digitally authorize their usage data to be shared with energy-efficiency applications, clean energy companies, analytics firms, and others, who can view and analyze the data and provide insights into managing and conserving resource consumption. Example 1: If you are considering installing or have installed solar panels on your home or business, you can connect the solar company to your Green Button usage data to analyze the return on your solar panel investment and make informed decisions about future investments. Example 2: Commercial or industrial customers with multiple locations across different utility territories can access and analyze energy usage data from all sites in a consistently standardized format.

+- How do I connect (share) my data?

Sharing your data starts on the third-party vendor’s website. • Go to the authorized third-party vendor’s Green Button registration web page • Complete the third-party vendor data sharing authorization request form • You will be redirected to a Green Button portal to authenticate, verify the data sharing information, review the terms and conditions, and authorize data sharing. • The site will then exchange a security token with the authorized third-party vendor which will allow secure, automated data sharing

+- What data is shared with the authorized third-party vendor(s)?

When authorizing a third-party vendor to access your data, you will select the type of data you want to share with them and for which account (if you have multiple accounts). You can select your Energy Usage Data, Billing Data and/or Account Information to be shared. Your utility provider will share the type of data you have selected and authorized for that account. Energy Usage Data includes: • Historical usages up to a maximum of 2 years and/or ongoing meter readings of your meters • hourly interval data • Net metering data Utility Bill Data includes: • Billing periods • Energy charges and adjustments Account Information includes: • Customer Name • Service address • Mailing address • Account number • Meter number • Customer rate class • Contact information

+- How long will my data be shared with an authorized third-party vendor?

When authorizing a third-party vendor to access your data, you select the duration and frequency that you would like to share your data for.

+- Can I stop sharing my data with a third-party vendor?

Yes, you can stop sharing your data with a third-party vendor at any time. To do so, simply go to the Data Shares tab within the Green Button portal, select the vendor you would like to stop sharing your data with, and click Revoke.

+- How do I know my data is secure?

Niagara on the Lake Hydro has been certified by the Green Button Alliance. This is the industry standard to ensure compliance with data sharing and security standards. Third Party vendors must also be certified by the Green Button Alliance to by authorized as a registered vendor. Before you authorize a third-party vendor, be sure to carefully read the terms and conditions on their website so that you understand how they will use, share or retain your data.

+- How do I register as a third-party vendor with NOTL Hydro?

This section is for third-party vendors looking to provide Green Button solutions to customers of NOTL Hydro. Customers must initiate Connect My Data (data sharing) through an authorized third party vendor’s website. View a current list of registered third-party vendors. Third-party vendors must register through NOTL Hydro. Please review our [Third-Party Terms and Conditions]. If you are interested in becoming an authorized third-party vendor, visit the vendor registration portal below to complete the registration form.

+- How do customers authorize a third-party vendor to access their data?

Customers must initiate Connect My Data (data sharing) through the authorized third party vendor’s website. From the third-party vendor website, the customer will be redirected to NOTL Hydro’s Green Button portal to authenticate and complete the Connect My Data authorization process.

+- Can a vendor submit an authorization form on behalf of a customer to access their data?

Customers are required to make their own authorizations online through one of the authorization methods. The customer must also authenticate with the utility before the security token can be exchanged with the utility and data can be shared.