Washington State Pioneers New Model for Utility-Scale Renewable Energy
April 19, 2017
Nonetheless, Washington’s large energy buyers have found it difficult to access renewable energy because nearly all buyers must go through their utilities to buy energy. Those utilities still use at least some fossil fuel-based sources.
Washington’s largest investor-owned utility, Puget Sound Energy (PSE), yesterday announced that it will meet some of those needs with Green Direct, a new renewable energy program, or green tariff. Green tariffs are programs offered by electricity utilities that allow eligible customers to buy energy from a renewable project as well as the Renewable Energy Certificates (RECs) the customers have traditionally purchased.
PSE’s new tariff is the first of its kind, offering a model for other utilities around the country to offer affordable renewable energy through the grid to smaller, existing customers. Green Direct’s first subscribers include commercial customers (REI, Starbucks, Target), local governments (Anacortes, Bellevue, King County, Mercer Island and Snoqualmie) and local institutions (Western Washington University and Sound Transit).
An Innovative Approach to Utility-Scale Renewable Energy
While some companies have added on-site renewables like solar PV, it’s rarely enough to meet their total electricity needs. Companies therefore look to the grid and their electricity utilities, which are regulated by the Washington Utilities and Transportation Commission.
Called Green Direct, or Schedule 139, PSE’s program offers customers a slice of a local, utility-scale renewable energy project that the utility signed a long-term contract with. Customers who choose the Green Direct program will pay a consistent price, even if PSE’s electricity rates rise over time for other customers using traditional fossil fuel-based power.
This is a groundbreaking approach to utility-scale renewable power. In October, WRI found that 10 green tariff options had been proposed or implemented around the U.S., but they primarily enabled a single very large, new customer to contract with a renewable energy project. PSE’s Green Direct program is the first of a new, subscriber-style of tariff, offering smaller customers a piece of a large renewable project. This will be the first green tariff used by retailers and small governments.
In Colorado (see docket 16A-0055E) and Minnesota (see docket 15-985), Xcel Energy is developing similar programs called Renewable*Connect, which won approval from state regulators this winter and will roll out to customers in the coming months.
PSE and Xcel Energy’s approach reflects a historic advantage for utilities: economies of scale. Utilities have always worked as demand aggregators, collecting the buying power of many customers to build large, centralized power plants that offer affordable rates. PSE and Xcel Energy’s subscriber programs apply that same approach to renewable energy projects, bringing together customer demand to deliver better prices for electricity than smaller renewable energy projects.
Comparison: Utility Subscriber Programs versus Community Solar
PSE and Xcel Energy’s subscriber programs are somewhat similar to community solar or shared renewables programs, which are also gaining popularity around the country. In those programs, many smaller customers usually buy part of the community project and pay it off over time, using the electricity from the project for their home or business to replace some of the power they would usually purchase from their utility.
Green tariff subscriber programs have advantages that appeal to Fortune 500 companies and other large buyers:
- Utility subscriber projects are much larger-scale. Community
solar may be quite small — often still a “distributed” renewable energy
project less than 5 MW, enough to power about 800 homes. PSE is signing a
contract for 130 MW of wind to support its Green Direct program. That’s
enough to power more than 32,000 homes, or a few large factories and
sewage treatment plants. Many large buyers need much more power than a
shared renewables program is designed to deliver, but are not large
enough to contract a whole 130 MW facility alone.
- Customers of utility subscriber programs pay a monthly bill, rather than making a capital investment. Often,
community solar programs ask customers to “buy a brick,” or invest
money to build the project. Most large companies do not want to spend
their capital on renewable energy projects—rather, they prefer to pay an
electricity bill each month that includes the power from a renewable
energy project. A utility or a private developer will then invest
capital in the project in return for those long-term payments.
- Customers of utility subscriber programs do not accrue a large bill credit for the power the project generates, as net-metered customers with onsite solar or community solar shares often do. In a subscriber program, customers pay for the power they use each month — at the cost of the renewable project — like customers accessing electricity from traditional power plants. This means that these projects are not subsidized by non-participating customers, as sometimes happens in net-metering.
With the emergence of the first, large-scale subscriber-based green tariff, other utilities can point their stakeholders and regulators to this positive example. Expect similar utility programs to crop up, providing new renewable energy at better prices to meet growing demand from large buyers.
This article was originally published by World Resources Institute under a Creative Commons license.
Lead image credit: Washington DNR/Flickr