Indonesia Plans 100GW Solar Boom in Just 3 Years

Indonesia just announced one of the world's most ambitious clean energy goals, and it's happening because solar power finally costs less than coal.

President Prabowo Subianto launched a plan last week to install 100 gigawatts of solar power in just three years. That's 67 times more than the country had at the end of last year, nearly matching the entire current electricity system of this island nation of 280 million people.

The announcement signals a major turning point. Indonesia is the world's third-biggest coal producer, sitting on massive coalfields that have powered its economy for decades. But the math has completely flipped.

Solar generation now costs about half what coal does in Indonesia, according to the Institute for Energy Economics and Financial Analysis. Coal-fired electricity runs 10 to 15 cents per kilowatt-hour, while solar comes in around half that price.

This price drop is reshaping energy across Southeast Asia. Solar power investment in the region jumped 59 percent in the first half of this year to $7.3 billion, driven by costs that have fallen 90 percent since 2010.

Indonesia is also betting big on battery storage, which has gotten dramatically cheaper. The government plans to use solar-battery combinations to replace expensive, polluting diesel generators on dozens of smaller islands, cutting costs while cleaning up the air.

The Bright Side

What makes this story truly hopeful is what it reveals about clean energy's momentum worldwide. When even coal-rich developing nations find solar cheaper than their own fossil fuels, the transition becomes about economics, not just environmentalism.

The plan faces real challenges. Only two of the 14 announced utility-scale projects are actually running, with six under construction and six still seeking investors. Indonesia's state power company published a much more modest goal last year, targeting just 6 gigawatts of new solar by 2030.

The country also shows how progress can be messy. Even with this solar boom, Indonesia's coal use is still projected to grow as energy demand surges and nickel refineries expand. Like India and other rapidly developing nations, Indonesia might see both clean energy growth and rising emissions for years.

But the direction is clear. When the president of a coal superpower calls a 100-gigawatt solar plan "no joke," it shows how far renewable energy has come.

The world's energy future is being written in places like Indonesia, where falling costs are making the clean choice the smart choice.