The grades of 4 Electrical Equipment stocks are better this week, according to the Portfolio Grader database. Every one of these stocks has an “A” (“strong buy”) or “B” overall (“buy”) rating.

Rockwell Automation, Inc. (ROK) gets a higher grade this week, advancing from a C last week to a B. Rockwell Automation, Inc. provides industrial automation power, control, and information solutions. The company also gets A’s in return on equity. For more information, get Portfolio Grader’s complete analysis of ROK stock.

Emerson Electric Co. (EMR) improves from a C to a B rating this week. Emerson Electric Co. is a diversified global technology company that designs and supplies product technology and delivers engineering services and solutions in a range of industrial, commercial and consumer markets around the world. The company also gets A’s in operating margin growth and return on equity. For more information, get Portfolio Grader’s complete analysis of EMR stock.

This week, American Superconductor Corporation’s (AMSC) ratings are up from a C last week to a B. American Superconductor Corporation is a power technology company, offering an array of proprietary technologies and solutions spanning the electric power infrastructure – from generation to delivery to end use. The company also gets A’s in sales growth and earnings revisions. For more information, get Portfolio Grader’s complete analysis of AMSC stock.

Ultralife Corporation (ULBI) boosts its rating from a B to a A this week. Ultralife Corporation is a battery, energy and communication product company that serves government, defense and commercial customers. For more information, get Portfolio Grader’s complete analysis of ULBI stock.

Louis Navellier’s proprietary Portfolio Grader stock ranking system assesses roughly 5,000 companies every week based on a number of fundamental and quantitative measures. Stocks are given a letter grade based on their results — with A being “strong buy,” and F being “strong sell.” Explore the tool here.