The Man Who Promised a Solar Economy
Not long ago, Elon Musk was one of tech's loudest champions of renewable energy. His pitch was sweeping and seductive: cover a small patch of the earth's surface in solar panels, hook them up to batteries, and you could power all of human civilization. He called it the "solar-electric economy" — a future where fossil fuels were a relic and clean electrons ran everything from cars to homes to factories.
That vision helped turn Tesla into the world's most valuable automaker. It launched SolarCity (later absorbed into Tesla). It made Musk the rare billionaire who could plausibly claim to be saving the planet while also getting very, very rich.
So what happened?
xAI Goes All-In on Natural Gas
Musk's artificial intelligence company, xAI, has quietly made a choice that cuts directly against the solar gospel he once preached. According to reporting by TechCrunch, xAI has gone all-in on natural gas to power its operations — a fossil fuel with significant carbon emissions and none of the renewable credentials that once defined the Musk brand.
This isn't a minor footnote. AI data centres are among the fastest-growing sources of electricity demand on the planet. The computational horsepower required to train and run large language models is staggering, and the energy source powering that compute matters enormously for global emissions trajectories. When a high-profile AI lab bets on gas, it sends a signal — and not a hopeful one.
The practical logic isn't hard to follow. Natural gas is reliable, dispatchable, and available at scale right now. Solar requires storage, grid infrastructure, and patience. When you're racing to build the world's most powerful AI cluster, patience is in short supply.
SpaceX's Orbital Distraction
Meanwhile, SpaceX appears to be chasing a different energy fantasy altogether: orbital data centres. The idea is that computing infrastructure launched into space could theoretically tap into uninterrupted solar energy — the sun never sets in low Earth orbit. It's a compelling concept, but it remains squarely in the realm of speculative engineering, not near-term climate solution.
Critics note the irony: the rocket launches required to put data centres in orbit are themselves enormously carbon-intensive. Reusable rockets help, but they don't eliminate the emissions math.
A Promise Left Behind
The shift matters beyond Musk's personal brand. His early advocacy helped mainstream the idea that electrification and solar were inevitable — that market forces and entrepreneurial ambition would do what policy alone couldn't. Millions of people bought Teslas partly because of that story. Investors poured money into clean tech on the strength of it.
Now, the companies Musk controls are making different bets. Not because solar doesn't work — rooftop and utility-scale solar continue to be among the cheapest sources of new electricity generation in the world — but because, for Musk's current priorities, the timeline and scale don't fit.
The solar-electric economy he promised isn't dead. It's being built by others, at utilities and clean energy startups and government programmes around the world. It just won't be led by the man who made it famous.
Source: TechCrunch
