Cryocoolers
CryoTel® Generation II Controller - Sunpower Inc.
The Generation II Controller is backward compatible with Generation I, so any setups which are communicating with Sunpower’s Generation I Controller will work with the new controller. Users switching from Generation I to Generation II may need to increase the DC voltage to the controller 1-2 volts to match the maximum power they attained with the Generation I Controller. The mass of the Generation II Controller is 490 grams.