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, Highpower International, Inc. (HPJ) is showing good progress as the company’s rating jumps from a B (“buy”) last week to an A (“strong buy”). Highpower International develops and manufactures nickel metal hydride and lithium-ion rechargeable batteries and related products. In Portfolio Grader’s specific subcategories of Earnings Growth, Earnings Revisions, Earnings Surprise and Margin Growth, HPJ also gets A’s. For more information, get Portfolio Grader’s complete analysis of HPJ stock.

The rating of PowerSecure International, Inc. (POWR) moves up this week, rising from a B to an A. PowerSecure International provides energy management and conservation solutions to utilities and their commercial, institutional and industrial customers. For more information, get Portfolio Grader’s complete analysis of POWR 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.