This paper was considered the economics with the financial evaluation of photovoltaic system by using a generic Excel model and assessment of 140 W photovoltaic stand-alone system. Financial evaluation consists of two cases; evaluation in case of using lithium-ion batteries and evaluation in case of using lead-acid batteries for energy storage. Results of the financial evaluation were considered as follow conditions.
Conditions of the financial evaluation
a) Size of solar power generation system is 140 W.
b) The interest rate loan is 7.203%
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