A faith so strong, apparently, that he is willing to risk the future of Tesla for it.

Opinions varied widely on the proposed deal after it was announced after trading closed Tuesday, with Tesla shares falling more than 10% on Wednesday, erasing several billion dollars from its valuation, and SolarCity shares rising more than 3%.

Many Tesla shareholders believe the company would be better served by focusing all its resources on its immediate tasks at hand, including ramping up production of its mass-market model Model 3.

Some