Here is how it works.
1. You subscribe to a community solar project.
The community solar company develops a solar project. The project will be within National Grid’s service territory but not necessarily within your town. The developer elects to give all of the electricity generated to National Grid. In exchange, National Grid creates solar “net metering” credits in dollars to the community solar company equal to the value of the solar power. The community solar company then finds customers (like you) to support the project.
You sign a contract and agree to purchase a portion of the net metering solar bill credits generated by the local solar project. In general, it is preferable to limit the dollar amount of the credits you commit to buy annually to less than the annual aggregate amount of your National Grid bills (otherwise, you might be buying more credits than you can use during the year). Your purchase agreement, combined with agreements by other subscribers enable the community solar company to finance and build the solar project. Note – with a community solar project here in Massachusetts, you are not buying electricity. The solar electricity itself flows into National Grid distribution system as part of the overall mix. Instead, you are agreeing to purchase some of the net metering credits created by National Grid representing the value of that solar power.
1. Typical terms are 5 – 15% savings off the value of your solar bill credits (not your entire electric bill). The number of solar credits you agree to purchase will determine the amount of your savings as a percentage of your entire electric bill.
2. You are assigned a number of “community solar shares” that will cover a portion of your electricity use. It may take some time (possibly months) between the time of your purchase commitment before the project goes into operation. Behind the scenes, the developer is finding the remaining buyers, securing permits and financing to build the solar project, building the project, and getting National Grid’s permission to operate the project.
3. Once in operation, the community solar project produces electricity for the distribution system each month. National Grid buys that electricity and creates the related net metering credits. The community solar company tells National Grid to allocate the net metering credits to you and the other customers. The credits will show up on your monthly National Grid bill. The amount of the credits you receive each month will vary based on the seasons, with more credits arriving during the sunny months and fewer over the less sunny months, which are then allocated to each participant in the community solar project. Your community solar company tracks the solar bill credits that you should receive on National Grid bill each billing period.
2. You receive a monthly bill from the community solar company. You pay the community solar company for the solar net metering credits from the solar project that appear on your National Grid bill. Typically, the community solar companies will offer a 5 – 15% discount on the value of the credits, meaning you will save 5 – 15% on the value of those credits received on your bill!.
3. Your monthly National Grid electric bill shows a credit for the net metering credits generated by your subscription to the community solar project.
4. Subscriptions can be cancelled or adjusted. Most community solar companies currently offer a long-term commitment with a locked-in savings percentage rate on the value of the credits. Most offer the ability to cancel with a six-month’s notice or adjust the purchase commitment with one- or two-months’ notice. National Grid processing can extend the sign up and cancellation timeframe.
FAQs
Why do we recommend EnergySage? They act as a neutral public marketplace / broker for multiple community solar developers. You can enter your zip code on EnergySage to find and compare multiple subscription options in our area. Best of all, EnergySage has expert, unbiased Energy Advisors available via phone and email to support you.
What are the benefits of community solar? Community solar is a way to support local clean energy development and jobs right here in Massachusetts. The developers need our subscriptions to get financing to build their projects. It can also lower electric bills for subscribers. Subscribing is a great way to save money and support local solar development!
Do subscribers directly receive power from the community solar project? No. Unlike a home with its own solar panels, the power generated by community solar cannot be delivered exclusively to a subscriber’s home. Like all electricity, power produced by a community solar project is sent to National Grid’s distribution system and distributed by National Grid to users the moment it is created.
Am I purchasing solar energy directly? No, but you are supporting development of solar projection. With a community solar project, while you will not be purchasing “green electricity” for your own use, purchasing net metering credits from a community solar project is still an effective and easy way to support local clean energy development and jobs in Massachusetts. The developers need our subscriptions to get financing to build their projects and they want satisfied customers.
What if I move? If you move to a new home within National Grid’s territory, you can continue your subscription. If you move outside the territory, you must cancel your subscription.
I signed up for community solar two months ago. Why do I not see solar credits on my National Grid bill yet? Many community solar companies sign up subscribers prior to the solar project being finished. You will only begin to receive bill credits and a community solar bill once the project become operational. This means that after you sign up, there may be a period of months before you see credits on your National Grid bill.
Why do my community solar and electric National Grid bills not match each month? Solar electricity production and your home’s electricity consumption are two independent processes; both vary by the month and season. Solar electricity production is driven by the amount of sunlight and is highest during the summer, medium during the spring and fall, and low in the winter. For an average home, electricity use is highest during the summer, medium during the winter, and lowest in the spring and fall.
National Grid accounting practices generally mean credits generated in one billing period typically arrive one, or sometimes two, billing periods later on a homeowner’s bill. Thus, your total electric National Grid bill, the solar bill credits that appear on your National Grid bill, and your community solar bill with the charges for those solar credits will vary by month and not in a coordinated manner. Community solar companies typically will bill you only for solar credits after you receive them on your bill, and/or provide a periodic reconciliation.
I have an electricity supplier. How would that work with community solar? You will not be buying electricity from the community solar company; you will only “buy” solar credits (in the form of dollar credits on your National Grid bill). Your National Grid bill lists the name of the company generating your electricity; this supplier will continue to be National Grid unless you make a separate decision to purchase your electricity from an alternate electricity supplier. If you want to consider changing your electricity supplier, the state has developed the Energy Switch website to help you identify companies offering supply to your community.
My municipality has a contract for electricity prices for its residents (known as community choice aggregation). Can I still sign up for community solar? Yes, you are eligible to sign up for community solar even if your electricity is provided through community choice aggregation. There is no change in the process for you to sign up for community solar.
I would like more information. What are some additional links to learn more?
What is Community Solar?
Comparison Shopping for Power from Community Solar Farms (Forbes magazine)
Is Community Solar Worth It?
How Community Solar Can Help Social and Environmental Justice
The Importance of Public Benefit Corporations, Stakeholder Capitalism and Corporate Responsibility