There are two main buying options available in the market:-
OPEX Model – In this, a third-party investor owns the solar plant. The consumer and the producer enter into a PPA (power purchase agreement) for a decided duration of time which is typically 15-25 years. During the tenure of PPA, the consumer pays the producer for the power generated at a decided tariff. After the PPA terminates, the solar plant is transferred to the consumer.
CAPEX model – In this, end consumer owns the solar plant by purchasing it upfront and can avail various financing options like bank loans to finance the solar plant.