CAPEX vs OPEX: Which Solar Model Is Right for Your Business?

One of the most common questions we hear from prospective clients is: 'Should we go CAPEX or OPEX?' Both models have distinct advantages, and the right choice depends on your organisation's financial priorities, available capital, and long-term energy strategy.

Under the CAPEX model, you make a one-time investment in the solar power project. The plant is your asset from day one. All the energy generated translates directly into savings on your DISCOM bill. This model works best for organisations with available capital and those looking to maximise long-term returns. With accelerated depreciation benefits, the effective payback period can be as short as 2-3 years.

The OPEX model, on the other hand, requires zero capital investment from your side. A solar developer (like SunMania) owns, installs, and operates the plant on your rooftop. You simply pay a fixed monthly tariff per unit consumed — typically 20-30% lower than your current DISCOM rate. After the Power Purchase Agreement (PPA) period (usually 15-25 years), the plant is transferred to you at a nominal cost.

Here's a real comparison: For a 50 KW system on a commercial rooftop in Pune, the CAPEX investment would be approximately ₹25-30 lakh. Monthly savings would be around ₹45,000-55,000, giving a payback period of 4-5 years. Under OPEX, the same system would deliver monthly savings of ₹15,000-20,000 from day one with zero investment.

Our recommendation? If you have the capital and want maximum returns, go CAPEX. If you want to preserve working capital while still reducing electricity costs, OPEX is the way to go. Either way, you're making a smart, green decision. Contact SunMania for a detailed financial analysis tailored to your facility.