Snowpack, streamflows, seasonality, salmon, etc. all affect the amount of water that can flow through a dam at any given time. Forecasting these variables predicts the available potential energy for a dam for a given period.[124] Some regions such as the Egypt, China and the Pacific Northwest get significant generation from hydroelectric dams. In 2015, SAIDI and SAIFI more than doubled from the previous year in Zambia due to low water reserves in their hydroelectric dams caused by insufficient rainfall.[125]
We have taken the legwork out of shopping for plans by providing the most straight-forward electricity shopping experience anywhere. We show you the best deals from the most respected, reputable providers in Houston. Our providers offer great electricity rates and provide a consistently high level of customer satisfaction. Our customers regularly report huge savings on their electric bills.
The weakest S&P 500 subsector during 2014 was Oil and Gas Drilling, down 46%, which wasn’t very surprising, considering the price of oil dropped 50% from its peak in June through the end of the year. That subsector has risen 6% this year through Monday’s close, showing that there’s plenty of buying taking place. Most other subsectors within energy declined last year, but only three have risen so far in 2015.
Studies show that generally demand for electricity is driven largely by temperature. Heating demand in the winter and cooling demand (air conditioners) in the summer are what primarily drive the seasonal peaks in most regions. Heating degree days and cooling degree days help measure energy consumption by referencing the outdoor temperature above and below 65 degrees Fahrenheit, a commonly accepted baseline.[123]
The inclusion of renewable energy distributed generation and AMI in the modern electricity grid has introduced many alternative rate structures. Simple (or fixed) rate, tiered (or step) rate, TOU, demand rates, tiered within TOU, seasonal, and weekend/holiday rates are among the few residential rate structures offered by modern utilities. The simple rate charges a specific dollar per kilowatt ($/kWh) consumed. The tiered rate is one of the more common residential rate programs, and it charges a higher rate as customer usage increases. TOU and demand rates are structured to help maintain/control a utility’s peak demand. The concept at its core is to discourage customers from contributing to peak-load times by charging them more money to use power at that time.
Then, in 2002, Texas deregulated the electricity market and everybody cheered!  Except that, sure, deregulation opened up the market to competition that may (or may not) have resulted in lower rates, but it introduced a whole host of other issues.  These issues may not have been factors before but now they’re critical when you’re on the look-out for cheap Houston electricity providers.

Where should you shop for electricity? Houstonians have the power to choose from an overwhelming variety of energy suppliers, plans, and options. If you live in the Houston metro area and your local electric utility is CenterPoint, over 50 different retail electricity providers currently offer electricity plans in your area. Each of these electricity providers offer sites, tools, and information on how to switch plans and providers. However, their information is often filled with electricity rates that are difficult to compare because of things like introductory rates, bill credits, narrow usage levels, unexpected fees, and legalese buried in the EFLs. Fortunately, Houston homes and businesses have electricity shopping options that make the process much simpler.
The problem is that across Africa, the vast majority of the power utilities are effectively bankrupt. Another World Bank study (pdf) on African Utilities shows that only two of the 39 African utilities surveyed, in the Seychelles and Uganda, were able to generate enough cash to cover both their operating costs and capital expenditures necessary to invest in the maintenance and expansion of the grid. In fact, only 19 of the 39 companies were able to generate enough cash to cover their day-to-day operating costs. It means the rest were not even able to pay everyday costs, like salaries, in full.
Electricity pricing (sometimes referred to as electricity tariff or the price of electricity) varies widely from country to country and may vary significantly from locality to locality within a particular country. Many factors go into determining an electricity tariff, such as the price of power generation, government subsidies, local weather patterns, transmission and distribution infrastructure, and industry regulation. “Electricity prices generally reflect the cost to build, finance, maintain, and operate power plants and the electricity grid.”[1] Some utilities are for-profit, and their prices will also include a financial return for shareholders and owners. Electricity tariffs vary by type of customer, typically by residential, commercial, and industrial connections. Electricity price forecasting is the method by which a generator, utility company, or large industrial consumer can predict the wholesale prices of electricity with reasonable accuracy. The cost to supply electricity varies minute by minute.[1]
The local electric company is the utility – that’s the company who owns the infrastructure, including the poles and power lines that deliver electricity to your home. They are who you call if your power goes out or there's an emergency. But in almost every city in Texas, you must choose another company to supply that energy, called a Retail Electric Provider (REP). These REPs, like Spark Energy, allow you to choose electricity plans that offer competitive prices and plans to meet your needs.