Austrian construction company Strabag SE (<a href="https://www.wienerborse.at/en/stock-prime-market/strabag-se-AT000000STR1/" target="_blank">VIE:STR</a>) has made its first investment in an energy storage producer with a EUR 100 million (USD 106.6m) bet on German battery maker CMBlu Energy as part of a preferred partnership agreement.