El Salvador’s volcanic mining: a strong symbol, a small plant

El Salvador is the country people name when they want Bitcoin to sound like statecraft. In 2021 it made bitcoin legal tender alongside the US dollar. President Bukele bought coins in public. A “Bitcoin office” existed. A geothermal plant next to the Tecapa volcano was wired to a few hundred mining machines. The pictures were excellent. The megawatts were not.

What the volcano actually did

In May 2024 Reuters reported that El Salvador had mined nearly 474 bitcoin over about three years using geothermal power from Tecapa, then worth around $29 million, taking official holdings to 5,750 BTC. The state geothermal facility produced on the order of 100–150 MW depending on the account; the mining hall took about 1.5 MW — three hundred machines. That is a pilot. It is not a national mining industry. It is also not nothing: 474 BTC is a real allocation, earned from a renewable plant the country already ran.

Later commentary restated the same 474 BTC at higher dollar prices as bitcoin moved. The coins did not multiply. The headline did. That is the first discipline this case teaches: separate the geology from the press office.

The treasury did more than the miners

Most of El Salvador’s bitcoin was bought, not mined. Daily purchases, IMF programme politics, IMF objections, a later IMF staff-level agreement that constrained some of the original legal-tender experiment — those are the treasury plot. Mining 1.5 MW did not fund the state. Spot accumulation and the political decision to hold did. If you are a company or a family office, this is the useful split. Hashrate is one way to add coins. It is rarely the main way, and it should never be the custody policy.

Private scale is a different project

Volcano Energy, a private developer, talked a much larger number: solar and wind first (tens to more than a hundred megawatts), geothermal later, with the Salvadoran state due a share of mining profit under an agreement, and surplus power to the grid. Tether appeared as an early investor in a round described in the hundreds of millions toward a roughly 240 MW renewable mining campus. Those are developer claims and funding headlines, not an operating report card. Geothermal law in El Salvador was still being written and, by 2026, incentivised. “Rent your volcano” was a presidential line, not a tariff sheet.

None of this makes geothermal mining unserious. Baseload heat is a real energy source. It makes the 1.5 MW state hall a demonstration, and the private campus a project-finance problem: interconnection, resource risk, offtake, and who holds the keys to the coins.

What to copy

• Copy the honesty about scale. A megawatt and a half is a pilot. Call it that.
• Copy the idea that a state or a company can earn coins from power it already has — if the power is surplus and the custody is real.
• Do not copy legal tender as a business plan. That was politics.
• Do not confuse a renewable story with a tariff. Geothermal, hydro, wind, and gas each have a different cost of being wrong.

For NexusArc clients the El Salvador file sits on the treasury desk more than on the hosting desk. Policy, allocation, and custody come first. Mining is a way to grow a stack only if the watts work. We will say when a volcano — or a wind farm in Karnataka — is a photograph, and when it is a plant.