Appliances are graded using capital letters
from "A" to "G" to indicate the energy consumption of a
product. A product with the letter "A" indicates it uses energy or
electricity most efficiently, while a product with a "G" grading
indicates the poorest performing product in that category of products.
The grading A-G is determined by the South
African National Accreditation System (SANAS) and the South African Bureau of
Standards (SABS). It is described in the relevant standard for each electrical
appliance. The minimum standards for many appliances have been adopted
from the European market. This will enable products to flow freely between the
continents without having to be re-tested and relabelled.
All products that are legally imported or
produced in South Africa carry the Energy Star, which will be visible in the
bottom right corner of the appliance.
Energy efficiency labels for appliances were introduced in May 2005 as
voluntary labels and became mandatory approximately 18-24 months after
implementation.
http://www.energy.gov.za/files/faqs/faqs_energyefficiencystandards.html
http://www.energy.gov.za/files/eee_frame.html