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”).

This week, PowerSecure International, Inc. (POWR) is making solid headway. The company’s rating improves to an A (“strong buy”) from last week’s B (“buy”) rating. PowerSecure International provides energy management and conservation solutions to utilities and their commercial, institutional and industrial customers. In Portfolio Grader’s specific subcategories of Earnings Growth, Margin Growth and Sales Growth, POWR also gets A’s. For more information, get Portfolio Grader’s complete analysis of POWR stock.

Highpower International, Inc. (HPJ) earns an A this week, jumping up from last week’s grade of B. Highpower International develops and manufactures nickel metal hydride and lithium-ion rechargeable batteries and related products. Shares of the stock have been trading at an exceptionally rapid pace, up twofold from the week prior. For more information, get Portfolio Grader’s complete analysis of HPJ stock.

Capstone Turbine Corporation (CPST) is bumping up its rating from a C (“hold”) to a B (“buy”) this week. 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.