Electrochromic panel transmission level synchronization

A controller with transmission level synchronization for electrochromic devices, comprising:

• a memory, configurable to hold a plurality of transfer functions for tint level relative to drive of a plurality of electrochromic devices;
• and
• one or more processors configurable to couple the plurality of electrochromic devices and to perform a method comprising:
• determine data structures associated with transfer functions for controlling the tint level relative to applied charge for each of the plurality of electrochromic devices, wherein at least one of the plurality of electrochromic devices is associated with a transfer function for controlling tint level relative to applied charge differing from at least one other of the plurality of electrochromic devices;
• and
• control the tint level for each of the plurality of electrochromic devices in accordance with the transfer functions across the plurality of electrochromic devices.