You can make a contract for electricity with the company of your choice. In many cities you can choose the municipal utilities if you like, they offer electricity, water and gas alike. You can choose a different company for each service. Normally, you pay monthly in advance and get a yearly bill that is cleared by the payment you already made. You should check the bill carefully. You may pay for electricity for a whole year in advance (depending on the company’s policy). If the company becomes insolvent, you might have a problem getting your money back.