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The Massachusetts Renewable Portfolio Standard (RPS) & Rhode Island Renewable Energy Standard (RES) in Plain English

RPS & RES Blog header -20

Updated July 8, 2021

As you may have heard by now, Massachusetts and Rhode Island are 2 out of 28 states that have a state mandate requiring retail electricity suppliers to provide a certain percentage of their electricity from renewable energy sources. And even though the RPS and RES are different as their names suggest, they have a common goal: to increase the amount of renewable energy in the region and to lower greenhouse gas emissions from the electricity sector. They do so by requiring electric utilities and competitive power suppliers to include increasing amounts of renewable energy in their supply mixes each year. For purely political reasons, municipally-owned utilities are exempt.

What do the standards require?

Both the RPS and RES require that the percentage from renewable energy resources must come from new projects that achieved commercial operations after 1997. The Massachusetts RPS calls these resources “Class 1” while the Rhode Island RES simply calls them “New”. These are the resources that most of us think of as renewable – wind, solar, small-scale hydro, and anaerobic digestion.

North ProvidenceNorth Providence solar array built on a closed landfill

Below, you can see the different technologies that qualify, as well as the distribution per technology in each state as reported in their 2018 compliance reports.

MA RI 2018

On the left: Distribution of generation types used to fulfill the RPS in 2018, retrieved from Massachusetts RPS & APS Annual Compliance Report for 2018. On the right: Distribution of New RECs used to fulfill the RES in 2018, retrieved from Rhode Island Annual RES Compliance Report for Compliance Year 2018.

A Brief History

The Renewable Portfolio Standard was adopted by Massachusetts in 2003. Seeing its initial benefits, the Mass legislature passed the Green Communities Act in 2008 which increased the RPS by 1% every year indefinitely. In 2018 that percentage is 13%. In 2018, the legislature changed this to a 2% per year increase from 2020 through 2029. In 2021, the State House passed yet another comprehensive piece of legislation which increased the RPS to 40% by 2030.   

MA rps

Rhode Island adopted the Renewable Energy Standard in 2004. In June 2016 the Rhode Island legislature extended the RES at a 1.5% increase every year through the end of 2035. From 2035 on, retail electricity suppliers are required to keep providing 38.5% of their load (the final target) from renewables in perpetuity. The Ocean State is currently exploring paths on how to get to 100% renewable electricity by 2030.

RI RES bar chart

Solar Gets Special Treatment

Both states have created special incentive programs to boost their in-state solar industry. In Massachusetts, that first came in the form of the RPS Solar Carve-Out (SREC) Program. Under this program, PV projects built from 2010 through April 2014 were categorized as SREC-I and from May 2014 through November 2018 as SREC-II. Both SREC-I and SREC-II got higher incentives than regular Class I resources making solar in Mass very profitable. Massachusetts is now moving away from the SREC program and it’s kicking off its new Solar Massachusetts Renewable Target (SMART) program later this month.  SMART decreases the incentive that solar receives over time in order to bring solar to the same level as other Class I resources.

Rhode Island took a different approach when it decided to create the Renewable Energy Growth program. This program, which targets all renewables not just solar, requires National Grid to offer to long-term contracts with projects and offers a performance-based incentive.

Massachusetts also has a Clean Energy Standard

As if matters weren’t complicated enough, beginning in 2018 Massachusetts also introduced its Clean Energy Standard (CES). The CES is a regulation created in response the Supreme Judicial Court ruling in Kain v. DEP - the lawsuit to which Green Energy Consumers was party. It requires that more electricity come from new renewables, including large hydroelectricity from Canada (whereas the basic RPS excludes large hydro). It started at 16% of retail load in 2018 and it increases by 2% every year until reaching 80% in 2050. The Clean Energy Standard is not part of the Renewable Portfolio Standard. It actually sits on top of the RPS demanding more renewable energy as seen below. The CES  It is currently being reevaluated by the MA Department of Energy Resources as the percentage requirements from 2028 through 2030 are the same as the RPS for those years.

MA ces

Where do RECs come into play?

When renewable energy is generated two things happen: the green electrons get delivered to the grid and a Renewable Energy Certificate (REC) is created. One Megawatt hour (1,000 kWhs) generates one Renewable Energy Certificate. Electricity and RECs can be bought, consumed and sold separately. Utilities and retail electricity suppliers demonstrate to the Massachusetts Department of Energy Resources and Rhode Island’s Public Utilities Commission that they have fulfilled the requirements of the RPS/ RES by providing RECs based on the percentage requirement for that year. If for some reason a utility or competitive supplier cannot meet its obligation it must pay an Alternative Compliance Payment (ACP) for each megawatt hour that it does not have a REC for.

We will be posting another blog post in the near future on the importance of REC tracking and their ability to green our New England grid. Stay tuned!

Why are the RPS and RES important?

Both the Renewable Portfolio Standard and the Renewable Energy Standard have been the main forces behind renewable energy development in Massachusetts, Rhode Island and the rest of New England. They show our commitment to renewable energy by creating competitive markets that benefit ratepayers. Renewable energy helps us break our dependency on fossil fuels. It also helps bolster our economy by creating local and meaningful jobs. But most importantly, the RPS and RES have enabled both states to lower greenhouse gas emissions from the electricity sector, helping the region combat climate change.

          Want to see how you can make a difference? Check out our Green Powered program.