Lake Tahoe’s power supply and the Nevada data center question

How Tahoe ended up buying power from Nevada

Fortune reported that NV Energy sold its California electric assets to Liberty in 2009 and agreed to supply power temporarily, with extensions in 2015, 2020 and late 2025[6]. Today Liberty generates about 25 percent of its power from solar facilities in Nevada and buys the rest through NV Energy, CalMatters reported in March 2026[7], and has no California grid connection at all[3].

What is actually ending, and when

The CPUC’s draft resolution states that the current NV Energy energy services agreement, approved in January 2026, ends when NV Energy’s Greenlink West line is operational or in May 2027, whichever is later[1]. CapRadio reported in August 2026 that, after several renewals, the deal is set to run until December 31, 2027[3]. South Tahoe Now, publishing Liberty’s timeline in July 2026, reported the official transition is expected to begin in 2028 once Greenlink is in service, which NV Energy’s most recent public posting expects by December 31, 2027[8]. Liberty says NV Energy will no longer be its energy supplier but will remain its transmission provider[9].

Liberty’s March 2026 advice letter to the CPUC says NV Energy, citing its own resource needs, declined to extend the full-service arrangement[4], and Moonshine Ink reported Liberty described the discontinuance as “a surprise”[10]. In July 2026 the CPUC voted to authorize Liberty to issue a request for proposals for a new supplier[3]; per CapRadio, Liberty’s FAQ says bidding opens in summer 2026, results are likely in winter 2026-27, CPUC approval is expected in spring or summer 2027 and the transition starts in 2028[3].

The data center question, stated by both sides

This is where accounts diverge, so here is each in its own words.

NV Energy: in May 2026 the utility said the decision for Liberty to move to its own supply is based on agreements and planning dating back more than a decade, and that data centers did not influence it[5]; it added there is no scenario in which Liberty customers will be left without service[5]. NV Energy’s Nannini told Moonshine Ink the decision reflected original contractual intent “well before data center load growth was a consideration”[10], and the company told CapRadio there is no correlation between the rise of data centers and its plans to stop supplying Liberty[3].

The CPUC record: the draft resolution records Liberty’s view that, absent unexpected and unprecedented large load developments in northern Nevada, NV Energy would have been amenable to continuing full-service supply[1], and describes the northern Nevada electricity market as competitive, with a number of entities seeking to add large loads such as data centers[1]. That is Liberty’s characterization as recorded by the CPUC, not a commission finding about NV Energy’s motive.

Press framing: Fortune’s May 2026 article asserted in its own words that NV Energy needs the capacity for data centers; NV Energy disputes this[6].

What northern Nevada’s load numbers show

The scale of large-load interest in northern Nevada is documented in NV Energy’s own regulatory filing. In its 2026 integrated resource plan, filed May 6, 2026 with the Public Utilities Commission of Nevada, NV Energy said it had received about 22 GW of data center interest inquiries and executed about 6 GW of signed Rule 9 infrastructure agreements[2]. About 84 percent — almost 5 GW — of those signed agreements are with large-load customers in northern Nevada, and Sierra Pacific’s forecast projects kWh sales doubling by 2029[2]. For scale, Sierra Pacific’s 2025 peak load was 2,073 MW, compared with Nevada Power’s 6,168 MW[2].

CalMatters reported that NV Energy’s director of business development said at a September 2025 event that data centers had driven requests to triple the company’s peak capacity[7], and Fortune reported that the Desert Research Institute, using NV Energy’s 2024 IRP data, found 12 data center projects mostly in northern Nevada could drive 5,900 MW of new demand by 2033[6].

Those figures explain why the question is being asked. They do not, by themselves, establish why NV Energy chose not to extend the Liberty arrangement, and the utility’s own statements are above.

Common questions

Is Lake Tahoe losing its power supply because of data centers?

Liberty Utilities is losing NV Energy as its energy supplier, not its power. NV Energy says the change follows agreements and planning dating back more than a decade and that data centers did not influence it. The CPUC record notes Liberty’s view that unprecedented large load growth in northern Nevada changed NV Energy’s willingness to continue.

When does NV Energy stop supplying Liberty Utilities?

The current agreement ends when NV Energy’s Greenlink West line is operational or in May 2027, whichever is later; CapRadio reported the deal now runs to December 31, 2027, with the transition to a new supplier expected to begin in 2028.

Will Lake Tahoe customers lose electric service?

NV Energy said there is no scenario in which Liberty customers will be left without service, and NV Energy remains Liberty’s transmission provider. Liberty is running a CPUC-authorized solicitation for a new energy supplier.

How much data center demand is northern Nevada seeing?

In its 2026 integrated resource plan, NV Energy reported about 22 GW of data center interest inquiries and roughly 6 GW of signed infrastructure agreements, about 84% of them with large-load customers in northern Nevada, where the 2025 peak load was 2,073 MW.

Sources

1. Draft Resolution E-5458: Liberty Utilities (CalPeco Electric) Request for Expedited Approval of Request for Proposals for Energy Supply and Energy Management Services
   California Public Utilities Commission · 2026-07-02
   4 source excerpts

   “Liberty serves approximately 49,000 electric customers in and around the California side of the Lake Tahoe Basin.”

   “Absent the unexpected and unprecedented large load developments in northern Nevada, Liberty believes that NV Energy would have been amenable to providing continued full-service energy supplies.”

   “The current NV Energy ESA, approved in January 2026, will end when NV Energy's new Greenlink-West transmission line is operational, or May 2027, whichever is later.”

   “The electricity market in Northern Nevada is competitive, as a number of entities are seeking to add large loads, such as data centers, into the area.”

2. Joint Application for approval of the 2027-2046 Integrated Resource Plan, Volume 2 of 41 - Application, Exhibits and Testimony
   Nevada Power Company and Sierra Pacific Power Company d/b/a NV Energy (filed with the Public Utilities Commission of Nevada) · 2026-05-06
   3 source excerpts

   “NV Energy has received approximately 22,000 megawatts ("MW") or 22 gigawatts ("GW") of interest inquiries from data centers and has executed approximately 6 GW of signed Rule 9 agreements”

   “Putting it in perspective, Nevada Power's peak load for 2025 was 6,168 MW and Sierra's peak load for 2025 was 2,073 MW.”

   “approximately 84 percent (almost 5 GW) of the signed agreements are with large-load customers in northern Nevada—Sierra's load forecast projects kilowatt-hour ("kWh") sales will double by 2029”

3. Tahoe's power search advances, but questions remain
   CapRadio · 2026-08-06
   5 source excerpts

   “Liberty has no connection to the California electrical grid. Instead, the utility sources its energy entirely from Nevada, the majority of which comes from another investor-owned utility, NV Energy.”

   “Last month, executives with the California Public Utilities Commission voted to authorize Liberty Utilities to issue a request for proposals (RFP) for that new supplier.”

   “there is no correlation between the rise of data centers and NV Energy's plans to stop supplying Liberty's electricity”

   “Both companies acknowledged the agreement was always meant to be temporary, as Liberty was expected to secure its own transmission rights and energy supply. After being renewed several times, the deal is now set to run until December 31, 2027.”

   “The page says Liberty will open the bidding process this summer and likely reveal the results in winter 2026-27, with CPUC approval expected next spring or summer and an official transition starting in 2028.”

4. Advice Letter 287-E: Request for Expedited Approval of Request for Proposals for Short-Term Energy Supply and Management Services
   Liberty Utilities (CalPeco Electric) LLC · 2026-03-06
   Source excerpt

   “NV Energy, citing its own resource needs, declined to extend the full-services arrangement beyond the later of May 2027”

5. NV Energy responds to Fortune article about South Lake Tahoe's power supply
   2 News Nevada (KTVN) · 2026-05-15
   2 source excerpts

   “NV Energy says the decision for Liberty to move to its own power supply is based on agreements and planning that date back more than a decade.”

   “NV Energy says a transition is happening, but there is no scenario where Liberty customers will be left without service.”

6. 'It's like we don't exist': Nearly 50,000 Lake Tahoe residents face power loss as utility redirects lines to data centers
   Fortune · 2026-05-12
   3 source excerpts

   “NV Energy sold its California electric assets to Liberty in 2009 and agreed to keep supplying power temporarily. That arrangement was extended in 2015, again in 2020, and once more in late 2025.”

   “The reason? NV Energy needs the capacity for data centers.”

   “The Desert Research Institute, using data from NV Energy's 2024 Integrated Resource Plan, found that the 12 data center projects located overwhelmingly in Northern Nevada could drive 5,900 megawatts of new demand by 2033.”

7. Nevada utility to Lake Tahoe: Find electricity elsewhere (CalMatters, republished)
   The Nevada Independent / CalMatters · 2026-03-23
   2 source excerpts

   “Liberty, whose territory sits on the border of California and Nevada, generates about 25 percent of its power from solar facilities in Nevada. The rest is purchased through Nevada-based NV Energy”

   “Data centers have driven requests to triple the company's peak capacity, NV Energy's director of business development said at a regional business event in September, as first reported by the Las Vegas Review-Journal.”

8. CPUC gives okay for Liberty to issue RFP for new energy supply
   South Tahoe Now · 2026-07-30
   Source excerpt

   “The official transition is expected to take place beginning in 2028, once NV Energy's Greenlink project goes into service and the transmission capacity rights become available to enable this transition to the energy market. In the most recent public posting, NV Energy expects this to occur by December 31, 2027.”

9. What is changing with Liberty's energy supply? (Energy Supply Q&A)
   Liberty Utilities · 2026
   Source excerpt

   “While NV Energy will no longer be Liberty's energy supplier, NV Energy will remain our transmission provider.”

10. A Shock to the System
    Moonshine Ink · 2026-05-14
    2 source excerpts

    “The discontinuance of power generation by NV Energy, as noted in a March letter to CPUC from Liberty, came as 'a surprise.'”

    “NV Energy's Nannini said, contrary to other media reports, the decision to stop providing power for Liberty was not driven by the rise of data centers, citing original contractual intent 'well before data center load growth was a consideration … Data center growth did not change that position.'”

Each source was opened and checked against the excerpt shown. Company statements are identified as such. Figures are as published; where sources differ, each is shown.