Amazon Alexa Fund made its second investment in the smart thermostat developer, which has now raised $146m altogether.

E-commerce firm and cloud computing technology provider Amazon has contributed to a $61m series C round for Canada-based smart thermostat producer Ecobee through its Amazon Alexa Fund.

Private equity firm Energy Impact Partners led the round, which also featured the state-backed Export Development Canada and Ontario Capital Growth Corporation, Thomvest Ventures, Relay Ventures, North Leaf Capital Partners, Tech Capital and GXP Investments.

Ecobee has created a smart thermostat that connects to a user’s wifi system. It is capable of measuring…