Why Solar in the Atacama Matters | Bespoke Project Solutions

Why Solar in the Atacama Matters: Energy Security and Operational Efficiency for Science

There’s nothing casual about driving up to the Simons Observatory in Chile’s Atacama Desert. The road winds higher and higher into the Andes until you’re over 5,000 meters above sea level. Up here, you feel the altitude in your lungs, the grit of dust in your teeth, and the reality that even moving a pallet of gear is a logistical battle. Nothing comes easy at this elevation.

Now picture keeping an observatory powered in conditions like this. For years, the answer was diesel. Generators humming along, waiting on trucks grinding their way up the mountain. Every liter of fuel is hard-earned, hauled for kilometers through desert and switchbacks, with real cost, risk, and delay attached. No fuel in the tank, no science. Simple as that.

That’s why solar in the Atacama isn’t just nice to have—it’s game-changing. Irradiance is defined as the flux of photons received by a unit area of a surface, and this desert pulls in over 2,500 kWh per square meter annually. To put that in perspective, that’s about 40% more sunlight than we get back at our headquarters in Denver. That kind of power delivers capacity factors pushing 30%—world-class numbers for photovoltaics. In plain speak, the panels produce power day after day with remarkable consistency.

Atacama: Reliable Sunlight, Reliable Power

Figure. Sunlight and irradiance at Simon’s Observatory over the course of a year.

From our perspective at Bespoke, the operational difference couldn’t be clearer:

Energy security. No more wondering if a fuel truck will make it up the pass.
Predictable costs. The sun doesn’t care about diesel markets or transport bills.
Reliable uptime. With storage in the mix, sensitive instruments get steady power even in the driest desert on Earth.

As we build this thing, every load of steel we haul, every kilometer of mountain road we cover, drives home the same point: energy independence is critical at this altitude.

Solar here isn’t about checking a sustainability box. It’s about resilience, continuity, and keeping science alive at 5,000 meters. At Bespoke Project Solutions, we’re proud to be the crew putting that backbone in place—so the telescopes can keep their eyes on the sky instead of their fuel tanks.

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