Open Access Solar for Malls & Retail Chains: Multi-Site Aggregation

Published Fri Jun 26 2026 · Updated Thu Jul 02 2026

> **Quick Summary** > - **Ideal Load:** 1 MW and above (Aggregated or Single Site) > - **Primary Model:** Group Captive or Third-Party PPA > - **Landed Cost of Power:** ₹4.50 – ₹5.00 per unit (vs. ₹9.00 - ₹11.00 Grid Tariff) > - **Annual Savings:** ₹40 Lakhs to ₹1.5 Crores per MW > - **Payback Period:** 3–4 years (Capex) or Instant Savings (OPEX/PPA)

For a mall owner or a retail chain manager in India, the electricity bill isn't just an expense—it’s often the second-largest overhead after rentals. Between centralized air conditioning, high-intensity lighting, and escalators running 14 hours a day, the energy consumption at a retail destination is staggering.

In cities like Delhi, Mumbai, or Bangalore, commercial grid tariffs are crossing the ₹10/unit mark. When you add PPAC surcharges in Delhi, the financial strain becomes even more acute. While rooftop solar is a great starting point, most malls have limited roof space compared to their massive energy demand. This is where **open access solar for malls** becomes the ultimate game-changer. Through multi-site aggregation, retail chains can now power dozens of outlets using a single off-site solar farm.

## What is Open Access Solar for Malls?

Open access is a regulatory framework that allows large electricity consumers (with a sanctioned load typically above 100 kW or 1 MW, depending on the state) to buy power directly from a solar park located elsewhere, using the existing DISCOM transmission lines.

For malls and retail chains, this solves the "space constraint" problem. A retail chain like Chroma or Reliance Digital might have 20 stores across Noida Extension and Gurgaon, but none of them own the roof. By using **Open Access**, they can aggregate the load of all these sites and procure green energy from a centralized solar plant.

### The Power of Multi-Site Aggregation

Multi-site aggregation allows a business to combine the electricity demand of multiple electricity connections under a single procurement contract. Instead of installing small, inefficient solar plants on twenty different roofs, you "subscribe" to a large-scale project.

## Why Malls are Moving Beyond Rooftop Solar

While we at Bridgeway Power have installed over 5,000+ rooftops, we often tell our commercial clients that rooftop space in a mall usually covers only 10–15% of their total consumption.

## Financial Models: Group Captive vs. Third-Party PPA

When exploring **open access solar for malls**, you will encounter two primary financial structures. Choosing the right one depends on your cash flow and tax strategy.

### 1. The Group Captive Model (The 26/51 Rule) In this model, the mall or retail chain becomes an "equity partner" in the off-site solar plant. - **Equity Requirement:** The consumer must hold at least 26% equity stake in the project. - **Consumption Requirement:** The "group" of consumers must consume at least 51% of the power generated. - **Benefit:** You are exempt from paying the Cross-Subsidy Surcharge (CSS) and Additional Surcharge (AS), which can save you an additional ₹2–3 per unit.

### 2. Third-Party PPA (The OPEX Model) If you don't want to invest capital, a developer builds the plant, and you simply sign a Power Purchase Agreement (PPA). - **Investment:** Zero. - **Rate:** You pay a fixed tariff (e.g., ₹4.50/unit) for 15–25 years. - **Trade-off:** You still have to pay CSS and AS to the DISCOM, making the landed cost slightly higher than the Group Captive model.

### Commercial Solar Pricing 2026 (Landed Cost)

| Capacity Tier | Capex (₹/Wp) | Approx. PPA Tariff (₹/unit) | | :--- | :--- | :--- | | Up to 500 kW | ₹38 - ₹42 | ₹4.80 - ₹5.20 | | 1 MW - 5 MW | ₹36 - ₹38 | ₹4.40 - ₹4.80 | | 5 MW+ | ₹32 - ₹35 | ₹4.00 - ₹4.40 | *Note: Prices exclude GST and vary based on state-specific wheeling and banking charges.*

## Impact of Multi-Site Aggregation for Retail Chains

Imagine a retail chain with 50 outlets in Delhi NCR. Individually, each store has a load of 40 kW. None of them qualify for Open Access individually (as the threshold is often 100 kW+). However, by **aggregating the load**, the chain now has a total demand of 2,000 kW (2 MW).

This makes them a "Bulk Consumer," allowing them to: 1. Negotiate lower tariffs from solar developers. 2. Sign a single contract for all locations. 3. Benefit from Virtual Net Metering (where permitted) to offset bills across different DISCOM zones.

## Real-World Example: A 2-Site Mall Aggregation in Delhi

Let’s look at a practical scenario from our 2025-26 data: - **Client:** A premium mall in Saket and its sister commercial complex in Laxmi Nagar. - **Total Combined Load:** 3.5 MW. - **Grid Tariff:** ₹9.50/unit (Average). - **Solar Solution:** 3 MW Open Access (Group Captive). - **Landed Solar Cost:** ₹5.10/unit (including wheeling and banking charges). - **Savings per Unit:** ₹4.40. - **Monthly Generation:** 3,60,000 Units. - **Monthly Savings:** **₹15.84 Lakhs.** - **Annual Savings:** **₹1.9 Crores.**

This client successfully used Open Access to hedge against future tariff hikes. As the Delhi per-unit electricity rates continue to climb due to coal prices and DISCOM adjustments, their solar rate remains locked for 25 years.

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## Regulatory Hurdles: Wheeling, Banking & CSS

While the math for open access solar for malls looks incredible, it requires navigating DISCOM bureaucracy.

### 1. Wheeling Charges This is the "rent" you pay to use the DISCOM's wires to transport solar power from the plant to your mall. Wheeling and banking charges vary significantly by state.

### 2. Banking Charges Solar generates power during the day, but a mall stays open until 11 PM. "Banking" allows you to store excess daytime energy with the DISCOM and use it at night. DISCOMs usually charge a fee (in units or money) for this service.

### 3. Cross-Subsidy Surcharge (CSS) DISCOMs use high commercial tariffs to subsidize low household tariffs. When you stop buying from them, they lose that "subsidy" money. CSS is the penalty you pay to compensate them. As mentioned, the **Group Captive model** is the most popular because it legally eliminates this charge.

## Tax Benefits for Mall Owners

If you choose the Capex model (owning the plant), the government offers significant incentives: - **Accelerated Depreciation:** You can claim 40% depreciation in the first year, providing a massive tax shield for profitable mall management companies. - **GST Benefits:** Solar components are taxed at a concessional rate compared to other building materials.

## Maintenance and Technical Reliability

For a mall, power downtime is not an option. Off-site solar through open access is inherently more reliable than rooftop: - **Professional O&M:** Large solar parks have dedicated 24/7 maintenance teams, unlike individual rooftop sites where cleaning is often neglected. Dirty panels can lose 25% output in dusty cities like Delhi. - **Redundancy:** Since the power is delivered via the grid, you always have the grid as a seamless backup. - **Monitoring:** With Bridgeway Power's O&M management, you get a dashboard showing exactly how many units were generated by your share of the solar farm and how much was credited to your DISCOM bill.

## Choosing the Right Partner

With 35+ years of experience, Bridgeway Power helps malls and retail chains navigate the complex "Permit to Commissioning" cycle. We don't just sell panels; we structure the PPA, handle the 26% equity documentation for Group Captive models, and ensure DISCOM approvals are fast-tracked.

If your mall or retail chain is paying more than ₹2 Lakhs a month in electricity bills, you are essentially overpaying for a commodity that you could be sourcing at 50% of the cost.

## Frequently Asked Questions

### What is the minimum load required for open access solar for malls? In most Indian states, the minimum sanctioned load to qualify for Open Access is 1 MW. However, some states like Delhi and Haryana have policies that allow consumers starting from 100 kW to participate, especially under certain Green Energy Open Access rules.

### Can a retail chain aggregate load from multiple cities? Yes, but typically only within the same state. For example, a retail brand can aggregate stores across Noida Extension, Ghaziabad, and Lucknow because they all fall under the Uttar Pradesh state grid. Cross-state aggregation is possible but involves high "ISTS" charges.

### How does the electricity bill look after Open Access? You will still receive a bill from your DISCOM (e.g., BSES or PVVNL). However, there will be a "Solar Credit" section where the units generated by your off-site plant are deducted from your total consumption. You only pay the balance to the DISCOM, along with fixed charges and taxes.

### Is Open Access better than a Rooftop Solar system? For malls, a "Hybrid" approach is best. Use your roof for a small solar plant to maximize on-site savings reaching up to 15% of your load, and use Open Access to cover the remaining 85%. This ensures you utilize every square inch of your asset while achieving 100% green energy goals.

### What happens if the solar plant produces more power than the mall uses? This is where **Banking** comes in. The excess power is stored with the DISCOM. Depending on the state policy, you can either carry over these units to the next month or get paid for them at a lower "APPC" rate at the end of the financial year.

## Conclusion

**Open access solar for malls** is no longer a luxury—it is a competitive necessity. As operational costs rise, switching to a multi-site aggregation model allows retail businesses to lock in their energy costs for decades. At Bridgeway Power, we specialize in making this transition seamless for C&I clients across North India.

**Ready to see the math for your retail chain?** Contact Bridgeway Power for a free Open Access feasibility study and ROI projection today. Let us help you turn your electricity bill into a source of savings.