# cameroon gce intermediate level photovoltaic systems 2

### cameroon gce intermediate level photovoltaic systems 2

cameroon gce intermediate level photovoltaic systems 2

Table 1 below illustrates the details of loads to be used in a school Solution

 S/ N Description of load Power consumption (W) Operating voltage quantity Daily operating hours (H) 1 Lamps 10 12 10 10 2 Refrigerator 200 12 3 10 3 Fan 50 12 1 10 4 television 20 12 5 10

1.1 Calculate the total power (W) of the loads. (3 marks)
1.2 Calculate the daily load of the school in Wh. (3 marks)
1.3 Calculate the daily load of the school in Ah. (3 marks)
1.4 If the area insolation is 5.3KWh/m2 calculate the PV array size(Iarray) (3 marks)
1.5 If a solar panel with a peak current Imp of 8.01A is selected, calculate the total number of panels to be
connected in parallel
(3 marks)
1.6 Calculate the total size of battery bank knowing that C=(Ah x DOA)/(DOD x Efficiency). Where days of
autonomy (DOA) is 2, Depth of discharge(DOD) is 30%, efficiency is 80%.
(3 marks)
1.7 State four factors that will influence useful daily P.V module output to the controller. (3 marks)
1.9 Cables are rated for a certain current carrying capacity, explain. (2 marks)
(Total = 25 marks)