Lesotho Electricity Company has most of its customers on the prepayment system. This system comprises of meters and a computer system. The Computer system has a master station which is based at the head office and vending stations which are based in other LEC offices throughout the country.

Prepayment meters have a keypad which provides an interface with the customer to insert units in the form of 20 digits token that a customer gets from a vending station when buying electricity. Furthermore they have LCD display for a customer to see electricity credit, and this helps a customer to see his/her consumption rate.

There are different types of prepayment meters that LEC is currently using for its customers, and they are namely Cashpower, Ecolec, Conlog and Plessey. All these meters have been put on the same specification called Standard Transfer Specification (STS). This specified that all meters conforming to the specification should be able to meet certain criteria and similarly computer systems had to conform to the certain given criteria. This meant that any meter conforming to the specification could vend on any computer system conforming to the specification regardless of the manufacturer.