The overall ratings of 3 Electrical Equipment stocks are down on Portfolio Grader this week. Each of these rates a “D” (“sell”) or “F” overall (“strong sell”).

Plug Power Inc. (PLUG) earns a F this week, moving down from last week’s grade of D. Plug Power Inc. designs, develops, manufactures and commercializes fuel cell systems for forklifts and materials handling equipment. The company also gets F’s in earnings growth and return on equity. For more information, get Portfolio Grader’s complete analysis of PLUG stock.

Active Power, Inc. (ACPW) experiences a ratings drop this week, going from last week’s C to a D. Active Power, Inc. designs, manufactures and markets power solutions that provide business continuity and protect customers in the event of an electrical power disturbance. The company also gets F’s in return on equity and free cash flow. For more information, get Portfolio Grader’s complete analysis of ACPW stock.

Axion Power International, Inc. (AXPW) declines this week from a C to a D. The company also gets F’s in sales growth, earnings momentum, return on equity, and free cash flow. For more information, get Portfolio Grader’s complete analysis of AXPW 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.