I had a great Interview with them in 2018 March. They have actual fuel cell products and good collaboration with Renewable Energy National Lab. They got the funding from Massachusetts Clean Energy, which attracted me for applying the position. Be able to schedule the on-site interview at the weekend with me. No interrupt for my current job. However, I did not accept the job offer, since my current company started to apply H1B for me at that time. Good company and friendly people. I wish I would had the interview after getting the H1B.