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Amazon Web Services reportedly changed how its Mississippi data centers move from utility power to backup generation, so that Entergy Mississippi can trigger that switch itself during periods of peak demand. The change is a control-process update, not a physical rebuild of the facilities. The details come from a paywalled report by Catherine Perloff at The Information, and they have not been independently confirmed.
What changed in the switching process
The Information reports that AWS previously switched a data center from utility power to backup power only after contacting AWS to start the change. A system the report calls Project Falcon removes that contact step and lets the utility prompt the switch directly. Amazon told The Information that utilities in multiple regions can remotely prompt its data centers to use backup generation, which suggests the design is not unique to Mississippi.
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The table below sets out what the report describes and where the available reporting is silent.
| Step | Before Project Falcon (as reported) | After Project Falcon (as reported) |
|---|---|---|
| Who starts the switch | AWS, after being contacted by the utility | The utility can trigger the switch itself |
| Source of power during the switch | Backup generation, including gas-powered generators | Backup generation, including gas-powered generators |
| Fuel mix at each site | Not stated | Not stated |
| Frequency of utility-triggered switches | Not stated | Not stated |
| Full Project Falcon design | Not stated | Not stated |
The change concerns which party initiates a power-source switch. It does not mean the utility controls AWS workloads or decides what runs inside the buildings. Those are separate questions, and the reporting does not address them.
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Why a utility would ask for this
According to The Information, the change responds to a peak-demand warning rather than an outage. Entergy Mississippi reportedly told AWS it might need to reduce power use from Mississippi data centers during peak periods so the utility could keep serving other customers. Mike Sloan, CEO of Synergetic, explained the broader pressure in comments quoted by the outlet:
“Data centers are so giant, they’re pushing the capabilities of what the grid can do and how fast it can do it, so grid operators and utilities are putting special rules on these guys.”
An Entergy Mississippi spokesperson, also quoted by The Information, said data center customers, including AWS, are obligated to install equipment that protects the grid from power-quality problems caused by the size of their load. An Amazon spokesperson said the company works closely with utilities to support grid reliability while keeping its customers’ infrastructure resilient.
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What is not established
- The exact warning. The available text of the report does not show the precise wording or scope of Entergy’s request, and the report’s full body was not visible for verification.
- How often switching happens. No frequency, duration, or count of utility-triggered switches is reported.
- Fuel and emissions at each site. The report mentions gas-powered generators, but does not say which sites use which fuel.
- Contract terms tied to the switch. Whether the arrangement is written into the service agreement, and on what terms, is not stated.
- Current status. The Mississippi facility details below date from June 2026, and later changes are not covered here.
Where the Mississippi build-out stands
As of Mississippi Today’s June 9, 2026 account, Amazon had five buildings operating at Canton, with plans to at least double that presence. Ridgeland was in early construction, and Clinton and Vicksburg were in site preparation or pre-construction. These stages are dated. Anyone relying on them should check for later updates before treating them as current.
Amazon told Mississippi Today that it had worked with Entergy to cover 100% of the energy infrastructure and upgrade costs for its new campuses. That statement is Amazon’s account of its arrangement with the utility, and it is the core of the cost-allocation debate below.
Who pays for the grid: the competing bill claims
The switching change sits inside a larger argument about whether large data centers raise household bills. Four parties have made claims, and they answer different questions.
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Amazon’s position
Amazon’s policy statement says it pays its full electricity costs and the additional infrastructure needed to deliver power, including transmission lines, substations, and upgrades. It describes long-term utility agreements with minimum demand charges, financial guarantees, and multi-year commitments. These are Amazon’s descriptions of its own contracts, and the contracts themselves are not public.
Amazon’s sustainability FAQ cites an analysis by the consultancy E3 of four Amazon data centers, using utility bills, rate agreements, and grid data. E3 senior partner Kush Patel is quoted saying, “We were able to prove quantitatively that the [Amazon] data center had not been subsidized by other customers,” and adding, “They’re paying their fair share.” E3 researcher Liz Mettetal is quoted saying, “Data centers can have beneficial impacts on other customers.” The FAQ is published by Amazon, so the conclusions reflect its selection and summary of the E3 work.
Entergy’s position
Entergy’s August 27, 2026 release credits Amazon’s Mississippi facility revenue with eliminating a nearly $5 monthly residential bill increase under its Fair Share Plus pledge. Entergy chair and CEO Drew Marsh said: “Every new large customer added to the system helps pick up more of the grid maintenance improvement costs that existing customers would otherwise have to bear alone.” This is a utility’s accounting of its own rates, not an independent household analysis.
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The critical view
A May 2026 report by Synapse Energy Economics, published by Earthjustice, argues that confidential contracts and reduced public review can obscure cost allocation. It warns that customers could be exposed to cost shifting or stranded investments if large loads fail to materialize or leave. The same report acknowledges that large loads can help utilities spread fixed costs. Earthjustice is an advocacy organization, and the report should be read as an analytical counterpoint rather than proof that any particular Amazon contract shifts costs.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.The figures, and what kind of claim each one is
Several headline numbers circulate in this debate. They differ in kind, and the difference matters more than the size of the figure.
| Figure | Who states it | Date | What kind of claim it is |
|---|---|---|---|
| $300 million Entergy grid upgrade program over five years | Mississippi Today, reporting the utility program | 2026 | Planned program spending |
| 50% outage-reduction goal | Mississippi Today, reporting the Entergy program | 2026 | Target, not a measured result |
| 616 MW of new carbon-free energy from five renewable projects | Amazon, as reported by Mississippi Today | 2026 | Company projection of capacity from named projects |
| 152,000 U.S. homes | Amazon, as reported by Mississippi Today | 2026 | Company comparison for the 616 MW figure; not a statement that all data-center load is supplied by renewables |
| Nearly $5 per month | Entergy, August 27, 2026 release | August 2026 | Utility estimate of a bill increase its data-center revenue helped offset |
| 27% average U.S. residential price increase, 2020 to 2025 | Amazon sustainability FAQ, citing its own sourcing | 2026 | National statistic relayed by Amazon, not independently checked here |
| About 70% of U.S. transmission lines and transformers over 25 years old | Amazon sustainability FAQ | 2026 | National statistic relayed by Amazon, not independently checked here |
| 60% to 80% rise in transformer prices since 2020; lead times up to four years | Amazon sustainability FAQ | 2026 | National supply-chain statistic relayed by Amazon |
| 16% lower Mississippi residential bills than without the studied data center | Amazon sustainability FAQ, summarizing E3 analysis | 2026 | Modeled counterfactual projection, not an observed statewide result |
The most useful distinction is between observed bills and modeled counterfactuals. A bill that went down is measured. A bill that would have been higher without a facility is a model result, and its outcome depends on the assumptions behind it.
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How to test any bill claim
Before accepting a claim that data centers do or do not raise bills, check five things:
- Cost responsibility. Does the company pay the transmission, substation, and upgrade costs directly, or do those costs enter shared grid accounts?
- Type of claim. Is it a projection, a modeled counterfactual, or a measured change in bills?
- Public access. Can an outside reviewer see the contract terms and the analysis inputs, or only the summary?
- Capacity at peak. Does the utility have enough generation and transmission to serve all customers during the hours when demand is highest?
- Backup operations. Who starts backup generation, how often it runs, and under what emissions and permitting rules?
On the first three, the current sources give partial answers. On the last two, they give very little. Nothing reviewed establishes whether Mississippi’s peak capacity is sufficient, or how backup generation is regulated beyond the general statements above.
Quick Recap
What to watch next
- Any public Entergy Mississippi statement that names the peak-demand conditions under which utility-triggered switching would occur.
- Updates to the Canton, Ridgeland, Clinton, and Vicksburg project stages, which were last reported in June 2026.
- Whether the Synapse and E3 analyses are followed by filings or disclosures that expose contract terms or measured bill data.
- Any independent account of how often Project Falcon-style switches occur, which is not yet available.
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