Captive vs Group Captive vs OPEX Solar: Tax & Balance Sheet Impact

Published Wed Jun 17 2026 · Updated Thu Jul 02 2026

> **Quick Summary** > - **Capex Models (Captive):** Best for businesses with high tax liability (40% depreciation benefit). > - **OPEX Models:** Zero investment, fixed tariff (₹4.5–5/unit), ideal for cash-flow sensitive firms. > - **Group Captive:** Shared equity model (minimum 26%) to bypass high grid surcharges. > - **Payback (Capex):** Typically 3–4 years in India (2025-2026 rates).

For an Indian business owner, the decision to go solar isn't just about "saving the planet"—it’s a calculated financial move to protect the bottom line. With commercial electricity tariffs in cities like Delhi and Mumbai touching ₹9–11 per unit, the cost of power has become a massive overhead.

However, when you sit down with a solar consultant, you aren't just asked about panel brands. You are asked: "Do you want to own it, share it, or just buy the power?" This leads us to the critical debate of **Captive vs Group Captive vs OPEX solar in India**. Each model has a vastly different impact on your balance sheet, your tax returns, and your long-term energy security.

In this guide, we break down these models using 2025-27 financial guidelines, MNRE regulations, and real project data from Bridgeway Power’s 35 years of experience in the Indian energy sector.

## 1. Captive Solar (CAPEX): Ownership & Accelerated Depreciation

The Captive (CAPEX) model is the traditional "buy and own" approach. Your business pays for the entire system upfront, including the panels, inverters, and mounting structures. You own the asset, and you get all the power it generates for its 25+ year lifespan.

### The Tax Advantage: Why CFOs Love Capex In India, the biggest draw of the Captive model is the **Accelerated Depreciation** benefit. Under current IT rules for 2025-2026, solar assets qualify for a 40% depreciation rate in the first year.

For a business in the 25% or 30% tax bracket, this means a significant chunk of the solar investment is essentially "paid back" through tax savings in the first 12 months.

### Commercial Solar Pricing (2025-2026) | Capacity Tier | Price per Wp (₹) | Total Estimated Cost (Excl. GST) | | :--- | :--- | :--- | | Up to 25 kWp | ₹48 | ₹12,00,000 | | 50 kWp | ₹44 | ₹22,00,000 | | 100 kWp | ₹42 | ₹42,00,000 | | 500 kWp | ₹38 | ₹1,90,00,000 | | 1 MWp+ | ₹34–36 | ₹3,40,00,000+ |

*Note: These prices reflect MSME solar plant cost in India for high-efficiency Topcon Mono PERC modules.*

## 2. OPEX Solar (Renewable Energy Service Company - RESCO)

If you don't want to spend crores on panels but want to lower your electricity bill, the OPEX (or PPA) model is the answer. A third-party investor (like Bridgeway Power or our partners) installs the system on your roof at **zero cost to you**.

You only pay for the units generated at a pre-determined tariff (usually 40–50% cheaper than the grid).

### Balance Sheet Impact of OPEX In an OPEX model, the solar system is NOT your asset. It belongs to the developer. Therefore: - You cannot claim depreciation. - It does not show up as a liability (debt) on your balance sheet. - The monthly solar bill is treated as a standard operating expense (OPEX), similar to your BSES or PVVNL bill.

For more on choosing between ownership and service models, read our Solar PPA vs Capex vs OPEX guide.

## 3. Group Captive: The Open Access Power Move

The Group Captive model is designed for businesses that either don't have enough roof space or want to source power from a massive off-site solar farm. Under the Electricity Rules 2005, a "Group Captive" setup requires: 1. **Equity Stake:** The consumer(s) must hold at least **26% equity** in the generating plant. 2. **Consumption:** The equity holders must consume at least **51% of the power** generated.

### Why go Group Captive? By becoming a "partial owner" of the plant, you are classified as a captive user. This allows you to bypass the **Cross-Subsidy Surcharge (CSS)** and **Additional Surcharge (AS)**, which are the biggest hurdles in standard Open Access solar.

## 4. Financial Deep Dive: Captive vs Group Captive vs OPEX India

## 5. Real-World Example: A Manufacturing Unit in Faridabad

Let’s look at a typical scenario for an MSME factory in Faridabad with a monthly electricity bill of ₹3,00,000.

- **Current Grid Cost:** ₹9.50/unit (Avg. including fixed charges and PPAC surcharge). - **Solar Requirement:** 200 kWp. - **Estimated Project Cost:** ₹80 Lakhs (at ₹40/Wp).

### Option A: Captive Solar (Self-Funded) - **Year 1 Tax Saving:** ₹80L x 40% (Depreciation) x 25% (Tax rate) = ₹8 Lakhs. - **Yearly Energy Saving:** ~2.8 Lakh units x ₹9.50 = ₹26.6 Lakhs. - **Payback:** Approx 3 years. - **Total Gain (25 years):** Over ₹6 Crores.

### Option B: OPEX Solar (Zero Investment) - **Upfront Cost:** ₹0. - **OPEX Tariff:** ₹4.50/unit. - **Yearly Savings:** 2.8 Lakh units x (₹9.50 - ₹4.50) = ₹14 Lakhs. - **Risk:** Zero. The developer handles all maintenance for 15-25 years.

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### Option C: Group Captive (Limited Roof Space) If this factory only has space for 50kW but needs 200kW, they can invest in a Group Captive project. - **Equity Investment:** ~₹21 Lakhs (for 26% share of a 200kW slice). - **Outcome:** They get 100% of their power needs met at a low tariff without needing the physical roof space.

## 6. Financing Your Solar Journey

For businesses leaning towards the Captive model but wanting to preserve cash, financing is the bridge. As a neutral partner, Bridgeway Power works with all major lenders in the ecosystem:

- **PSU Banks:** SBI PM Surya Ghar Loan and PNB Solar Rooftop Scheme offer excellent rates for smaller commercial setups and residential-cum-commercial units. - **Specialized MSME Lenders:** SIDBI 4E Financing offers loans from ₹10L to ₹10Cr at highly competitive rates (8.5–10% p.a.). - **NBFCs:** Flexible options from Aerem and ECOFY provide faster processing and zero-cost EMI plans.

Learn more about commercial solar loans in India here.

## 7. Operational Realities: O&M and Longevity

Regardless of the financial model, a solar plant is only as good as its uptime. While OPEX models include maintenance, Captive owners must plan for it.

At Bridgeway Power, we manage over 25 MW of solar assets across North India. Our data shows that dust and soiling can cause a 25% drop in generation if not addressed monthly. For Captive owners, we recommend a comprehensive Solar AMC to ensure the 3-year payback doesn't turn into a 6-year struggle due to poor maintenance.

## 8. Locality Matters: DISCOM Policies in 2026

The choice between **captive vs opex solar india** is often dictated by your state's net metering rules:

- **Delhi:** Excellent for OPEX and Virtual Net Metering through BSES Rajdhani and TPDDL. - **Haryana (Gurgaon/Faridabad):** Strong support for Captive systems with DHBVN net metering. - **Uttar Pradesh (Noida/Ghaziabad):** Significant momentum in industrial zones for Open Access and Group Captive models.

Check our specific guides for solar in Noida and solar in Gurgaon.

## Frequently Asked Questions

### Which model is best for a business with high taxable profits? The **Captive (CAPEX)** model is superior because you can utilize 40% Accelerated Depreciation to reduce your income tax liability significantly in the first year.

### Can I switch from OPEX to Captive later? Most OPEX / PPA contracts include a "Buy-out" clause. After a certain period (usually 5 or 7 years), you can pay a depreciated value to the developer and take full ownership of the system.

### What is the minimum load required for Group Captive in India? While there is no strict "minimum" in the law, Group Captive usually makes financial sense for loads above 500kW or 1MW due to the legal and structural costs of setting up a Special Purpose Vehicle (SPV).

### Does Bridgeway Power provide OPEX solar for small shops? Typically, OPEX models require a minimum capacity of 50kW–100kW to be viable for investors. For smaller shops, a Captive system with an EMI plan is usually the better financial choice.

### Is the equity in Group Captive refundable? Usually, no. Your equity is your "skin in the game" that allows you to claim the electricity as a captive user. If you exit the contract, you typically sell your equity to the next incoming consumer or back to the developer.

## Conclusion

Choosing between **Captive vs Group Captive vs OPEX solar** depends entirely on your cash flow and tax strategy. If you have the capital and want the highest ROI, go **Captive**. If you want immediate savings with zero risk and no investment, go **OPEX**. If you are a large power consumer with no roof space, **Group Captive** is your best friend.

With 35+ years of experience and 5,000+ happy customers, Bridgeway Power is here to help you navigate these complex financial waters.

**Ready to see the math for your building?** Get a free solar consultation today.