Germany needs to adjust its plans for energy reform to save around 150 billion euros ($196.2 billion) by the year 2030, the chief executive of industrial conglomerate Siemens AG (SI) said Wednesday.

Peter Loescher sharply criticized rising energy costs, which could threaten
Germany 's industry-reliant economy.

"High energy prices could erode this solid foundation," he said.

Further, renewable energy must follow the rules of competition, Mr. Loescher said.

"Levies for renewable energies will reach a new high of roughly EUR16 billion this year. These costs are primarily borne by consumers," he said.

Siemens proposes abandoning a fixed target for renewables and focusing on reducing carbon dioxide emissions in the future, Mr. Loescher said.

"The country should give greater priority to high-efficiency combined cycle power plants and wind power," Mr. Loescher said, noting these have efficiency ratings of over 60%.

Mr. Loescher was speaking in Berlin.