The grades of three electrical equipment stocks are on the rise this week on Portfolio Grader. Each of these stocks is rated an “A” (“strong buy”) or “B” overall (“buy”).

Acuity Brands, Inc.’s (AYI) grade is moving up to a B (“buy”) this week from last week’s C (“hold”). Acuity Brands provides light fixtures, control devices, components, systems, and services for commercial, institutional, and residential applications in various markets. In Portfolio Grader’s specific subcategory of Earnings Revisions, AYI also gets an A. For more information, get Portfolio Grader’s complete analysis of AYI stock.

Highpower International, Inc. (HPJ) is making headway this week, with the company’s rating improving to an A (“strong buy”) from a B (“buy”) last week. Highpower International develops and manufactures nickel metal hydride and lithium-ion rechargeable batteries and related products. For more information, get Portfolio Grader’s complete analysis of HPJ stock.

This is a strong week for Capstone Turbine Corporation (CPST). The company’s rating climbs to B from the previous week’s C. Capstone Turbine is a developer, manufacturer, marketer, and service provider of microturbine technology solutions that are used in stationary distributed power generation applications. For more information, get Portfolio Grader’s complete analysis of CPST 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.