You can upgrade from any previous version of Channergy directly to the current version at any time. Upgrades are released approximately once a year.
The charge to upgrade Channergy is $500 for the first license and $200 per additional license (workstation) per version jump. For example, if you upgrade 2 Channergy licenses from version 2011 to version 2013 you are jumping 2 levels. Your total cost to upgrade is $1400 ($500 x 2)+($200 x 2). This upgrade charge is designed so you are never penalized for skipping an upgrade, or upgrading early.