simply so the going for walks voltage is sufficient for battery charging. Divide the tool voltage thru the   
nominal going for walks voltage of each module. To determine the huge style of modules in parallel the   
array output required (Ah) is cut up thru the output of each module (Ah). However this method   
does now not exercise in this research as it does now not hold in thoughts many things and in a hybrid tool   
power flows need to be recounted from hour to hour.  
2.8.4 Sizing The Charge Controller/ Battery Charger  
Generators in renewable systems are used to power the battery charger, particularly   
withinside the path of horrible weather, or to supply heavy loads. They can be routinely or manually   
controlled. In most systems, each diesel, petrol or fueloline driven turbines are used (Hove,   
2000).   
A battery charger converts the AC output to DC for the reason of battery charging. The battery   
charger ought to be determined on such that it converts the 240 volt, 50 Hz AC to DC on the favored bus   
voltage of the battery storage bank. It ought to be able to provide a right away modern as an awful lot as the   
maximum allowable price price of the batteries. The  essential factors to bear in mind whilst   
selecting a battery charger are the tool voltage and the maximum price of price of the   
batteries. There won`t be a battery charger with exactly the maximum modern distinct so a   
charger with lower modern may be chosen. The most probably available charger may be 24 Volt   
60 Amps. The period of the battery charger is determined thru the size of the battery bank (Hove,   
2000).  
A price controller ought to be sized to byskip the anticipated non-prevent modern from the   
array (or sub-array) into the battery, and ought to be able to withstand short peak   
currents due to sunnier than ordinary conditions. It is essential that the controller be   
efficaciously sized for the cause that expenses associated with the controller are a first-rate deal extra than the   
rate of initially installing a slightly big controller. A module will generally have a   
maximum modern output it is its rated short circuit modern (whilst battery voltage is   
low). It is possible for irradiance levels to obtain 3000 watts/m²; the short circuit modern is   
generally rated for irradiance levels of 1 thousand watts/ m². Charge controllers ought to be sized   
therefore, to adjust 130% of a module`s ordinary short circuit modern.