Delmarva Power By Don Rush • Apr 4, 2014 TweetShareGoogle+Email Credit Don Rush Delmarva Power is getting a $15.1 million rate increase from the Delaware Public Service Commission. The vote was 4-to-0. That gives the company a profit margin of 9.7 percent. The Wilmington News Journal reports that it is still not clear what the increase will mean for individual customers. Tags: Delmarva PowerelectricityWilmington News JournalDelaware Public ServiceTweetShareGoogle+EmailView the discussion thread.