Electricity Markets

Southwest Public Power Agency seeks long-term energy supply proposals

Arizona’s Southwest Public Power Agency Inc. (SPPA) is seeking to acquire long term energy supply arrangements through structured power purchase agreements under a request for proposals issued earlier this month.

SPPA will consider proposals for the following five primary constructs:

  1. New solar resources;
  2. New battery storage resources;
  3. New solar plus battery storage resources;
  4. New gas-fired resources; and
  5. Shaped renewable energy supply contracts

SPPA, a joint action agency, is interested in up to 100 megawatts of new solar or up to 200 MW of new gas-fired generation.

“While SPPA anticipates that most RFP respondents would submit proposals based on newly constructed generation, SPPA is willing to consider proposals associated with existing generation,” the RFP noted.

SPPA intends to solicit contract proposals for each of the five product constructs via a structured multi-stage RFP process administered by Enel X.


SPPA will first accept competitive, indicative offers via a sealed Indicative bid round beginning on Jan. 12, 2021.

Following the structured indicative bid round, SPPA intends to issue a revised RFP containing a shortlist of desired product constructs before collecting competitive, executable offers via an open live auction round on April 8, 2021.

“Responses to this RFP will only be accepted through Enel X and the Enel X platform. Alternate proposals or offers submitted outside of the Enel X Platform will not be reviewed or considered,” the RFP stated.

Bidders interested in participating within the upcoming indicative bid round must complete and submit a bidder qualification application by Nov. 17, 2020.

The sealed indicative bid round will take place on the Enel X platform on Jan. 12, 2021 through Jan. 14, 2021 and will be accessible by all bidders that have been pre-qualified to participate.

Additional information including a link to the RFP is available here.