Arizona Corporation Commission
1200 W. Washington Street
Phoenix, AZ 85007
Re: Arizona Public Service (APS) E-32 L SP Tariff, Docket E-01345A-22-0281
Madam Chair and Commissioners,
Pursuant to Decision No. 78317,1 APS was ordered to engage with stakeholders, namely the Arizona Solar Energy Industries Association (AriSEIA) and the Solar Energy Industries Association (SEIA), to redesign the E-32 L SP (Storage Pilot) rate tariff to increase customer adoption of the 35 MW commercial pilot program. AriSEIA appreciated the opportunity to provide constructive feedback and generally guide the tariff design process towards a solution that creates value for APS and the adopting customers.
Throughout the duration of 2022, AriSEIA met monthly with APS and reiterated that rate optionality and investment certainty are key components of behind-the-meter energy storage adoption as not all customer loads are created equal, and few customers are able to benefit from existing tariffs using 15-minute interval demand charges. To that end, we collaborated with APS on the proposed volumetric, time-of-use (TOU) rate including a substantial differential between on-peak and off-peak rates which de-risks the customer’s energy storage investment in terms of achieving monthly savings while creating grid support during the utility’s coincident peak periods. Our assessment of the new rate tariff is that it will encourage participation in the pilot energy storage program through market-competitive payback opportunities. This rate tariff may also provide a foundation to develop more value-stacking opportunities for utilities such as distributed virtual power plants or similar grid-response programs.
While the proposed E-32 L SP pilot revisions are a significant step in the right direction, we believe that further alignment with APS’ true coincident on-peak demand periods is important to creating an equitable program. To this end, we issued our recommendation to APS to limit the on-peak hours to Monday through Friday in lieu of across all seven (7) days of the week as the weekend load and marginal prices are typically much lower and do not merit the same TOU price differential. We look forward to continuing to work with APS as this program evolves.
Thank you for considering these comments and we encourage you to adopt this rate in the first quarter of 2023 and to continue promoting more grid-interactive programs for customer-sited distributed energy resources.
President, Board of Directors
1 Arizona Corporation Commission, Decision 78317, November 9, 2021, available here https://docket.images.azcc.gov/0000205236.pdf?i=1670984264693.
Goodyear and Oro Valley Selected by the Department of Energy for $15K Solar Adoption Program
Goodyear and Oro Valley have been selected by the NREL, the National Laboratory funded by the Department of Energy, as one of 12 communities nationwide to adopt the innovative solar permitting platform SolarAPP+. Through the program, the two cities are eligible to receive $15,000 if SolarAPP+ is adopted successfully.
“We’re excited to see NREL’s announcement and the fact that residential solar is receiving its time in the spotlight here in these two cities,” said Autumn Johnson, Executive Director of the Arizona Solar Energy Industries Association (AriSEIA). “Syncing this program with the community’s burgeoning solar market validates all the hard work that AriSEIA and other advocates continue to do. Both in our market and across the country, ensuring that consumer interest is met with efficient permitting processes can really help ensure the solar industry continues to shine.”
SolarAPP+ is an online platform that instantly issues permits for code-compliant residential rooftop photovoltaic (PV) and battery systems. As many consumers and local jurisdictions know, permitting can often slow the process for residential solar and battery installations. Current permitting delays are estimated to increase solar cost by $7,000 per project. With the convergence of increased consumer interest in solar installation and federal legislative momentum, clearing this potential bottleneck of long review timelines and complicated permitting applications is imperative. SolarAPP+ provides local governments, installers and homeowners with a streamlined process to more quickly achieve clean power generation from the sun.
SolarAPP+ has already approved more than 10,000 permits across jurisdictions, including successful programs in Arizona, California, Illinois and Texas. Since SolarAPP+ provides an immediate permit for those communities vetted and determined to be eligible, projects have been installed about two weeks faster under the program.
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