Taking college classes in high school

@ucbalumnus @rosa1748 I understand that some college courses may seem better than others (e.g. Multivariable Calculus, Linear Algebra, etc.) But what about courses like these:

    Energy Management Systems and Controls 
Renewable and Alternative Energy Systems 
Electric Power Systems 
    Introduction to Energy Management 

These are all 1 unit (each) courses & are online courses. Would taking these classes a waste of time? Or can colleges know if they are i unit classes/online classes?