Solar power startup Ausra looks to sell itself

* Potential buyers are international conglomerates

* Deals in "aggressive level" of discussion

* Solar thermal start-up raised $130 mln in venture capital

By Laura Isensee

LOS ANGELES, Nov 13 (Reuters) - Kleiner Perkins and Khosla Ventures-backed solar thermal start-up Ausra Inc is in talks to sell itself with three potential buyers, two sources familiar with the company told Reuters on Friday.

The buyers could take a majority stake or snag the whole company and the discussions are at a "very aggressive level", said one source familiar with the company, who was not authorized to discuss the matter publicly.

Both sources said the interested companies were global conglomerates in the power generation business but declined to name them. The companies already have various power products, such as steam and gas turbines, and are committed to renewable energy. One interested party has engaged with Ausra previously, one source said.

Ausra declined to comment.

A sale of the high profile Silicon Valley start-up that has raised $130 million in venture capital would add to a string of recent deals and growing consolidation in the solar power industry.