Tecogen (TGEN) said Monday it received $3.3 million in purchase orders, including for a demonstration project.

The company said it expects additional orders in July that would lift its product backlog above $8 million.

Tecogen said it hosted four in-person and two virtual demonstrations for data center developers representing a combined more than 1 gigawatt of installed capacity, with additional visits scheduled this month.

Separately, Tecogen said it was added to the russell microcap index.