Billionaire tech guru Elon Musk has offered to rebuild Puerto Rico’s entire electrical grid using an advanced solar-power system after Hurricane Maria knocked out electricity to all of the island’s 3.5 million residents.

Puerto Rico’s governor has already said he’s interested.

Musk, founder and CEO of vehicle maker Tesla, tweeted Thursday that Tesla has developed solar power grids for much smaller islands, including the island of Ta’u in American Samoa and Kauai in Hawaii.

“There is no scalability limit, so it can be done for Puerto Rico too,” Musk tweeted.

Hours later, Puerto Rico governor Ricardo Rossello tweeted back approvingly.

“Let’s talk today; I will be in touch,” the governor wrote.

“Sounds good,” Musk replied.

Tesla has already sent hundreds of its Powerwall battery systems to the island as it reels from the damage of the storm, amid public controversy over the effectiveness of the US government’s response. The Powerwall, launched in 2015, is a battery designed to power homes by storing energy generated by solar panels.

While Musk says the company’s previous work can be scaled up to an island the size of Puerto Rico, doing so will require a truly Herculean increase in magnitude from what’s been done before.