Solar Electricity DC Systems.
Low Voltage Power
This is probably the simplist set up as it is self contained. The solar panel can be directly connected to your appliance (eg a pond pump/fountain) and provide 12v or 24v DC - the same type of voltage provided by a battery. Obvoiusly the appliance will only work during daylight hours so if you want to use the energy at other times, for example lighting in your shed or garden, you will need to store it until required. This is quite simply acheived by connecting a charge controller and battery between the solar panel and appliance. The charge controller ensures that the battery does not get over charged causing irreversable damage. Any type of lead acid battery can be used, but the best batteries to use are 'deep cycle batteries', often called leisure batteries. Unlike car batteries, these are designed to withstand deep discharge without damage. They are made with much thicker and heavier lead plates, which are more resistant to damage, and last many times longer than conventional lead acid batteries.


