Sending Starlink internet systems to Ukraine has been costly to the company, according to the CEO.
The billionaire responded to a report by the Financial Times about "catastrophic" outages of the satellite internet service by saying that it had cost him $80 million.
Musk accused the Financial Times of faking claims that Starlink service was paid for.
He said that what is happening on the battlefield is classified.
Insider made a request for comment from the company on Saturday.
In the early months of the war, Mykhailo Fedorov urged Musk to give Starlink systems toUkraine. In a matter of hours, the billionaire said the systems were active and more would be on the way.
In July, Fedorov told Insider that there was still a need for more Starlink systems.
Fedorov did not say how many Starlink systems had been damaged, but he praised the service.
According to the June all-hands meeting slideshow, the company has delivered 15000 Starlink kits to Ukraine.
The Washington Post reported that the US Agency for International Development paid $2 million for 1,333 terminals.