SpaceX's $50 billion Arizona campus is a 6 GW power bet with payment terms still in negotiation

SpaceX is pursuing a roughly $50 billion campus in Cochise County that needs up to six gigawatts from two cooperatives. The electricity contracts, not the zoning vote, will price the risk.

SpaceX's Arizona campus has no on-site power plant, so it must secure up to six gigawatts of grid power.

Two questions follow: whether SpaceX can obtain and profitably use that power, and who pays if the demand falls short. This piece takes the second, because the contracts that answer it are still under negotiation. Call the structure the Grid Option: the economic advantage a customer may gain when utility infrastructure is committed before its demand is certain. The contract sets the price of that advantage.

SpaceX says it is pursuing a roughly $50 billion supercompute campus in Cochise County. SpaceX's campus page says there is no on-site power plant. Standby gas generators of about 10 MW in each of nine buildings come to roughly 90 MW. On CTOL's arithmetic, that is 1.5% of full load, and $50 billion over up to 6 GW is $8.3 billion per gigawatt.

The cooperatives supply the power; the terms are open

SpaceX's page says power comes from Sulphur Springs Valley Electric Cooperative (SSVEC) and Arizona Electric Power Cooperative (AEPCO). It reaches a utility-owned substation on the site. KJZZ reported that the applicant is Tombstone Resources LLC and that the developer pays for upgrades. KJZZ also reported that SSVEC is negotiating financial protections in case the project closes or does not use the energy requested.

That sentence is the whole option. If the load arrives, the cooperatives gain a giant customer. If it does not, someone owns capacity built for it. KJZZ puts the proposal at twice the load of the rejected La Osa data center in Pinal County.

On scale against the local grid, Baxtel, relaying earlier local reporting, puts SSVEC's summer peak at about 250 MW. On that unconfirmed figure, 6,000 MW is 24 times the peak. The peak is not confirmed against an SSVEC document.

The offered payments run near 1% of capex, and none is firm

SpaceX's page lists up to $190 million a year for SSVEC capital improvements and up to $53 million to the SSVEC Foundation. It adds up to $200 million to AEPCO. All of it is subject to final negotiations. A separate FAQ line says up to $260 million for SSVEC members, a $17 million gap. The page also anticipates $34 million to $103 million a year in county property tax.

On CTOL's arithmetic, $34 million plus $443 million is $477 million, and $103 million plus $460 million is $563 million. Against $50 billion, that is about 1% a year. The $50 billion is a rough figure. The payments and tax are SpaceX's "up to" or "anticipated" estimates. The result describes the offer as SpaceX states it, sets no floor on receipts and says nothing about unused capacity.

SpaceX's own numbers also moved. Earlier coverage had about 3,000 construction jobs and a one-time county sales tax benefit of up to $450 million. The 12 November page says about 5,500 and $250 million. It narrows the bill claim to "up to 20%" from a reported 10% to 40%.

Ohio and Virginia made big loads pay for reserved capacity

A template exists. AEP Ohio's data center tariff covers loads of 25 MW or more, with a minimum charge on at least 85% of subscribed capacity and a 12-year term. A customer that leaves must "pay an exit fee equal to minimum charges for 36 months after notice of termination," in the tariff's words. New Project Media, citing an AEP letter, reported 13,022.7 MW of load-study requests across 36 sites after the tariff, and 5,642 MW of new signed service agreements.

Inside Climate News reported a similar Virginia class for Dominion: 14-year contracts and minimum demand charges. Nate Benforado of the Southern Environmental Law Center called these commitments "the best way to shake out that speculative load."

The catch is that the match breaks in two places. AEP Ohio and Dominion are investor-owned utilities applying a tariff to many customers. SSVEC and AEPCO are member-owned cooperatives, and reporting so far describes a negotiation with one applicant, not a filed tariff. The Ohio signings are also spread across many customers.

Paying for construction does not settle who pays for unused capacity

The strongest opposing case comes from SpaceX itself. Executive Riley Trettel spoke at the 4 November meeting. As Baxtel reported, he said: "We are paying for everything, every single cent". Baxtel also reported $3.6 billion of new transmission, described as later transferred to AEPCO at no cost to the cooperatives. Both come from that one secondary report and are unconfirmed. Reuters noted that SpaceX's AI segment produced more than half of its revenue in the third quarter.

If SpaceX funds the build and signs enforceable minimum payments, the cooperatives could come out ahead even if the campus never reaches full load. But construction funding is proposed, not completed payment, and it does not protect against future non-use.

That protection takes minimum payments, credit support and exit terms that cover the capacity built ahead of demand. SSVEC is negotiating protections for the case where the energy goes unused. The only payment figures on the record are "up to" and subject to final negotiations, and SpaceX's own pages differ by $17 million a year.

On investinglive's figures, the AI segment spent about $16.4 billion of capex against $7.6 billion of revenue in the quarter. SpaceX can pay for the grid and still leave the cost of unused capacity open. The cooperatives can come out ahead if the contracts bind and cover it.

The first public test is the Cochise County Planning and Zoning Commission hearing on 9 December, which Baxtel reports as starting at 2 p.m. Signed terms with SSVEC and AEPCO would settle it only if minimum payments, credit support and exit terms cover capacity built ahead of demand. If it shows only "up to" figures subject to final negotiations, the option is still unpriced in public.

The next date is SSVEC's rate case, expected in fall 2027 per KJZZ. As of this check, the public record shows no ratepayer-protection terms or cost-allocation filing, so who carries the cost of unused capacity is not established.