BERLIN—Engineers at the Fraunhofer Institute for Reliability and Microintegration are developing an inverter that can work at a lower operating temperature. 

PORTAGE, IN—Fronius USA has invested more than $1.5 million in its assembly plant here to make inverters for solar power.

SAN ANTONIO—KACO New Energy has opened a new assembly plant here to make inverters for solar power. The facility is expected to employ 72 people.