Under the opex model a renewable energy service company resco invests builds and maintains a rooftop onsite solar plant.
Opex model solar rooftop.
In this model the consumer purchases the solar system by making 100 of the payment upfront or financing the system often through a bank.
It is successful model internationally and remains so in india also as the consumer has not to incur upfront capital costs.
As of march 31 2019 opex model based projects hold more than 37 share of cumulative onsite solar installations in india.
This model is getting highly popular in india and many opex.
The end consumer pays for the power generated under a long term power purchase agreement ppa.
This opex model is famous in many countries including us where half of rooftop solar pv installations are owned by opex developers.