This week’s question is a continuation of the topic about DC
Thinking along the lines of DC arc flash, this week's question is about the types of DC sources so here it is:

What DC sources do you/clients have?

Battery Systems
Rectifiers
Motor Drives
Photo Voltaic PV Systems
DC Generator (rotating machine)
Generator Excitation System
Other (please mention)
None

Select ALL that apply. If you have a source not listed, please tell us with a comment.

Thanks!