<p>Are you in College of Letter and Science? If yes, this page, <a href=“http://ls-advise.berkeley.edu/registration/unitceiling.html”>http://ls-advise.berkeley.edu/registration/unitceiling.html</a>, explains unit ceilings. It looks like the maximum units you can have are 130 units.
This may not apply to other colleges. For example, “[t]he College of Chemistry does not have a rule regarding maximum units that a student can accumulate.”</p>