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Report finds tribal utility-scale solar is booming in the Southwest

By Kelsey Misbrener | October 23, 2019

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Deals for utility-scale solar installations are accelerating on tribal lands in the Southwest U.S., according to a report published by the Institute for Energy Economics and Financial Analysis (IEEFA).

The report, “Tribal Utility-Scale Solar Initiatives Advance Across Southwest U.S.,” cites the emergence of battery-storage technology, state energy policy changes and the rapidly falling prices of utility-scale solar as factors driving the trend. A fast-growing trend among utility companies to move away from coal for various reasons is a trends as well.

Three tribes are advancing the trend:

  • In Nevada, the Moapa Band of Paiutes in 2017 blazed the tribal utility-scale solar trail with a 250-MW installation that supplies power directly to the Los Angeles Department of Water and Power (LADWP). The tribe is proceeding now with the development of two new solar farms, one 200 MW and the second 300 MW, that will provide power to NV Energy, the biggest utility in Nevada.
  • In New Mexico, the first tribal utility-scale solar project on record, on Jicarilla Apache land, will send power via the Public Service Company of New Mexico to the City of Albuquerque as part of a larger plan to replace generation that will be lost in the closure of the coal-fired San Juan Generating Station, which has grown so uncompetitive as to be a drain on ratepayers. The Jicarilla project is a sign — like the Nevada projects — of things to come in one other respect: It pairs 50 MW of solar generation with a 20-MW storage component.
  • In Arizona and Utah, the Navajo Tribal Utility Authority has partnered with the Salt River Project in Phoenix on a 55-MW solar park that feeds into the regional grid, and the tribal utility has struck a deal with 16 Utah cities to buy electricity from a planned 66-MW solar farm on tribal land in San Juan County, Utah.

“All the deals are tied to long-term power purchase agreements that run from 15 to 25 years, and pricing on the most recent ones — ranging from roughly $21 to $23 per MWh — shows why utility-scale solar has become so attractive,” the report states. “Gas- and coal-fired electricity generation, by comparison, are much more expensive.”

The report notes, for example, industry details from Lazard’s most recent annual levelized cost of electricity data update, which put the cost of coal-fired generation nationally at $60 to $143/MWh and gas-fired generation at $41 to $74/MWh. The unsubsidized cost for wind ranged from $29 to $56/MWh, with the subsidized cost falling as low as $14/MWh. Lazard estimated the unsubsidized price of utility-scale solar at $36 to $44/MWh.

“That estimate now seems behind the times,” the IEEFA report states.

The report notes nonetheless that tribal lands in the Southwest U.S. remain vastly underdeveloped on the utility-scale solar front and that enormous opportunity exists for deals between utility companies, tribal governments and tax-equity developers.

“Tribal lands of the Southwest U.S. are far and away the largest single repository of utility-scale solar potential, but development of these resources has moved at an almost-glacial pace,” the report states. “Indications are that a paradigm shift is at work, however, as tribal interests begin to partner with developers that bring tax-advantage incentives to the table and with utility companies driven by the low cost of utility-scale solar; state mandates also in some instances are helping propel the uptake of renewable energy.”

News item from IEEFA

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About The Author

Kelsey Misbrener

Kelsey is senior editor of Solar Power World.

Comments

  1. Solarman says

    October 23, 2019 at 8:18 pm

    Here’s what I find interesting: “In Arizona and Utah, the Navajo Tribal Utility Authority has partnered with the Salt River Project in Phoenix on a 55-MW solar park that feeds into the regional grid, and the tribal utility has struck a deal with 16 Utah cities to buy electricity from a planned 66-MW solar farm on tribal land in San Juan County, Utah.”

    The NGS coal fired plant in Northern Arizona is to be decommissioned at the end of 2019. The Kayenta coal mine is to be shut down and yet there is a proposal of buying bankrupt mines in Wyoming in the “name” of the Navajo Nation. Wait, what? The infighting is becoming intense and it is not a certainty the purchase of the coal assets in Wyoming will go through. There has also been talk of construction of a utility scale solar PV plant where the NGS is sited right now. There is plenty of property for large scale solar PV and energy storage on and around the NGS site now. The construction of a large scale solar PV plant with energy storage could serve Northern Arizona, S.E. Nevada and S.W. Utah as an energy hub. The Navajo Nation has its own EPA, where is the enforcement clout of this body?

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