The electrical power environment in the developing world is deteriorating due the lack of funds to purchase new equipment and maintaining existing, poor training and lack of appropriate test equipment for national utility personal, and an ever increasing demand for electricity. The result is extremely poor power quality in the form of outages, brownouts, and transients of overvoltage due to disturbances on the power lines. This electrical environment destroys medical equipment. Alternative energy sources such as diesel generators sets, hydroelectric plants, solar electrical systems and storage devices such as battery inverters unit can provide solutions to the transitional utility electrical power source.
Obviously, the diesel generator set uses fossil fuels which lend themselves to purchase , transportation, and maintenance issues. The average cost of producing electrical power by diesel generator set is $0.28/ KWHr. A small rural hospital using 240 KWHr per day averaging 10 KW of constant usage can expect a cost of nearly $70 per day. The math is daunting as the hospital grows in size and electrical power needs. In order to cut the run time of the diesel generator set to manageable cost and maintenance, the installation of a battery inverter system will store electrical energy in batteries and then return that energy to the system through a DC/AC inverter when the diesel is not running. Normally, this reduces the run time of the diesel by a factor or 50%.
Solar, wind turbine, and hydroelectric power sources reduces or eliminates the dependency on the traditional electric utility source. Each of these sources are site specific and must be carefully evaluated for each applications. See the article which elaborates on each source.