A 2.5 kWp stand alone PV system has a lifetime of 20 years and capital cost of Rs 200,000. It requires replacement of the battery having a cost Rs 30,000, every 5 years; replacement of a 2.5 kW inverter with integrated charge controller having a cost of Rs 20,000 in 15 years. The system also has an annual maintenance cost (Cleaning) of Rs 5,000. Discount rate is 3% and inflation rate is 3.5%. Assume that the capacity factor of the system is 20% and the annual degradation of the system is 0.5%.

a) Calculate the Life Cycle Cost of the system

b) Calculate the levelised cost of electricity generated by the system.