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Another method of reducing the effects of Global warming is to use Photovoltaic (PV) systems.  However, these products use a totally different type of technology than what is used for “thermal water heating” to convert radiation from the sun into useable electricity, through storage batteries and inverters.  Whilst most people are looking to “save” electricity by creating electricity from PV systems, these systems do not offer the same level of economic benefits as a solar or heat pump water heaters.   At present, most PV systems provide an efficiency level of approximately 17% which means they can convert approximately 17% of any available radiation into useable electrical energy.  On the other hand the technology used for solar water heater collector panels for instance, has been developed over many years with most systems on the market today offering efficiency levels of 70% and sometimes higher.  This in turn means solar thermal water heater panels can convert approximately 70% of any radiation that is available into heating energy for the water.

In a general domestic household situation, particularly in developed Nations, the energy needed to heat the water in a standard electric hot water system can represent between 40% and 60% of the total energy use of that household.  Solar or Heat Pump Water Heaters can save up to 80% of that energy which works out to be almost 40% to 50% of the total energy requirement of each household.  If this is then compared to an average saving of around 17% in energy use from Photovoltaic (PV) Systems, it is easy to see that at this point in time, solar or heat pump water heaters offer a better financial outcome for home owners.  However, in Commercial applications such as hotels, motels, larger restaurants, gymnasiums, and many other similar institutions, the sheer level (kW) of energy that can be saved by using large capacity commercial heat pump water heaters is enormous.  Some Governments are offering attractive rebate schemes to encourage commercial users to take advantage of these energy efficient appliances, and it will be these installations (particularly the commercial type) that will have a significant impact on Global Warming.

Global warming is a phenomenon that has been widely debated for a number of years now, and almost everyone has an opinion about it – some agree and others don’t agree.  Regardless of what any individual’s opinion may be, it is still worth considering for one moment the amount of pollutants that we as humans create and ultimately disperse into the atmosphere.   One of the largest sources of air pollutants contributing significantly to Global warming is gasoline and diesel engine motor vehicles.  This problem is emphasised even more in large cities all over the world mainly due to traffic congestion where motor vehicle engines are running for much longer periods, than they would if the traffic flow was better.  The amount of harmful carbon monoxide and carbon dioxide that is dispersed into the world atmosphere ever day is extreme to say the least.  To ensure that this situation changes, Governments must act quickly to participate themselves, and encourage private enterprise to develop alternative solutions that will allow the phasing out of the gasoline engine modes of transport.  Alternative suggestions could be battery powered, hybrid gasoline/battery powered, or hydrogen powered engines.  The general public also has a part to play by constantly lobbying politicians, and all communities working together.  

 Another simple method of addressing Global warming is by installing energy efficient products and equipment, such as energy efficient light bulbs and solar hot water systems, or heat pump hot water systems.   Heating water with renewable energy sources other than electricity or gas alone is something that can have a significant impact on Global warming.  The use of renewable energy sources such as the sun – for solar hot water systems or heat energy from the air – for heat pump hot water systems, savings of up to 80% of energy needed to heat the water can be achieved using renewable energy sources.  For a standard domestic household hot water system the reductions in carbon emissions gained by using a solar or heat pump hot water system can equate to the same emissions reduction as taking a small car off the road for one year.  Generally these types of technology are very cost effective and in recent years some National and even State Governments around the world have introduced solar hot water rebates to encourage people to purchase energy efficient hot water systems.   It is now important to raise awareness throughout the world in order to get as many people as possible to recognise and understand the impact of Global warming for the present, as well as for future generations.