Home Retail CPI to build printed electronic energy harvester for retail applications CPI to build printed electronic energy harvester for retail applications UK printed electronics hub the Centre for Process Innovation (CPI) has announced a new 18-month project named HaRFest. Want to read more? You need to be a subscriber to read the full version of this article. Log in below for immediate access. Not a subscriber? Sign up today for full access to Tire Hub' exclusive, in-depth content. Prices start from: £800 /year