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Business Model Comparison

Switching to solar power is a commendable move for your business, and a cost-effective one too in the long run. However, there are a lot of underlying technicalities you need to know before making the final move to go green.

When you are considering buying solar power, you would generally find two options in the market – Investing into a rooftop solar plant or buying solar power under a power purchase agreement (PPA). Both the options can be availed under two models: the capital expenditure (CAPEX) model or the operating expenditure (OPEX) model. In this section, we help you make an informed decision by highlighting the differences between the two in terms of their merits and disadvantages, and which model suits your business better.


Customer owns the asset

Upfront investment

Capital repaid through generated electricity

Payback less than 6 years and full saving from generated electricity for the coming years

Tax benefit (income tax, VAT)

Other benefits (if any i.e. carbon credit, incentives, etc.) 


Developer owns asset

No upfront investment, only provide roof (in good condition)

Saving generally 10% from generated electricity

Contract 25 years, penalty for prematurely termination

No tax benefit

Other benefits taken by developer


Chart on the left shows typical comparison between CAPEX and OPEX

Any corporation that can make an upfront investment in purchasing a solar power plant can go for a CAPEX model. 

A CAPEX investment carries huge potential in that you can develop a 30% equity IRR with well-managed CAPEX projects, and your project payback time after 5 years is typically only 1 year. 

It’s a great investment.

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