The Tesla founder opened up to the “Aquaman” actress after she confided in him that she wanted to obtain a restraining order against her then-husband in May 2016, according to texts revealed as part of Depp’s explosive libel trial.

Proposing to “arrange 24/7 security” for the actress, the billionaire wrote, “the offer would stand, even if you never wanted to see me again.”

“Anyway, sorry for being an idiot,” Musk wrote. “The radio silence hurts a lot. It only matters because I really like you.”

One of Depp’s lawyers, Eleanor Laws, pressed Heard, 34, in court Tuesday about the messages, asking her, “Were you telling Mr. Depp about this?”

“Time and again, you have accused [Depp] of being jealous, but we can see here you are in communication with someone,” Laws said.

But Heard responded, “I think all jealousy could be deemed illogical.”

Heard and Musk, 49, later went public with a relationship, but have denied that their romance started while the actress was still with Depp, 57.

The court has heard that Musk was a frequent visitor in 2015 to the Los Angeles pad where Heard and Depp lived before their divorce two years later.

Building concierge Alejandro Romero wrote in a sworn statement that he saw Musk “a few times a week” late at night and that he’d “always visit when Mr. Depp was not at home” from around 11 p.m. to midnight.

Heard — who appeared in court for her second day on the stand — said Romero was “wrong,” insisting that she “wasn’t even in communication with Elon until 2016.”

The testimony marked the third week in Depp’s libel case against The Sun over allegations of domestic violence during his volatile marriage to Heard.

With Post wires