Solutions • Offsite Solar

Solar Parks

Shared Infrastructure, Lower Costs

Multiple solar projects within a common park, sharing pooling substations, evacuation lines, security, and maintenance. Bulk land deals and shared resources mean 10-15% lower tariffs than standalone plants.

Utility Scale Solar Park

50+ MW Installation

Pooling Substation

Grid Connectivity

The Power Park Model

Shared Infrastructure = Lower Costs

A solar park hosts multiple independent projects separated by fencing, but sharing critical infrastructure. This model delivers significant cost advantages over standalone utility-scale plants.

Pooling Substation

Shared 33/66/110 kV

Evacuation Line

Shared HT Line

Security

Shared Perimeter

Water Supply

Common Source

O&M Team

Shared Maintenance

Bulk Land

Volume Discount

Solar Park vs Standalone Utility Plant

Parameter	Solar Park (Shared)	Standalone Plant
Land Cost	Lower (bulk deal)	Higher (individual)
Substation Cost	Shared across projects	100% borne by project
Transmission Line	Shared evacuation	Dedicated line needed
Security & Fencing	Perimeter shared	Full boundary cost
O&M Cost	Economies of scale	Higher per MW
Material Transport	Bulk logistics	Project-specific
Typical Tariff Impact	10-15% lower	Baseline

Typical Solar Park Layout

Project A

20 MW

Project B

15 MW

Project C

25 MW

Project D

10 MW

Shared Pooling Substation

33/110 kV

Shared Perimeter

To Grid

Each project has its own fenced area within the park, but shares common infrastructure

The Concept

What is Offsite Solar?

Offsite solar means sourcing renewable power from a solar plant located away from your consumption site. The power is wheeled through the state grid using open access regulations.

How It Works

Solar park generates electricity at remote location (e.g., Rajasthan, Gujarat)

Power injected into state grid via pooling substation

Wheeled through transmission network to your location

You draw equivalent power from grid, offset against generation

Onsite vs Offsite Solar

Aspect	Onsite	Offsite
Location	Your premises	Remote
Scale	kW to low MW	MW to GW
Grid Dependency	Minimal	Full
Open Access	Not required	Required
Space Needed	Yes	No

Infrastructure

Solar Park Components

Solar Park

Generation

Inverter & Transformer

Conversion

Pooling Substation

Grid Injection

Transmission

Wheeling

Your Factory

Consumption

Solar PV Modules

High-efficiency bifacial modules, 540-700W capacity.

TOPCon/HJTBifacial25-30 yr warranty

Mounting Structure

Fixed tilt or tracker systems optimized for land.

Galvanized steelSingle-axis trackersWind rated

Inverters

Central or string inverters with SCADA integration.

Central 3-5 MWString inverters99% uptime

Pooling Substation

Step-up transformers and HT switchgear.

33/66/110/220 kVProtection systemsMetering

Transmission Line

Dedicated or shared transmission to grid substation.

HT lineBay extensionGrid connectivity

SCADA & Monitoring

Real-time performance monitoring and dispatch.

SLDC integrationWeather stationPerformance analytics

Advantages

Benefits of Solar Park Power

Utility Scale Power

Access MW-scale clean energy without land or infrastructure constraints at your site.

10-100+MW Capacity

Long-Term PPA

Lock in fixed electricity rates for 15-25 years, protecting against tariff escalation.

25 yrsPrice Certainty

RE100 Compliance

Meet renewable energy commitments and sustainability goals with verified green power.

100%Renewable

Zero CapEx

No upfront investment required. Pay only for the power you consume at agreed rates.

₹0Investment

Tariff Hedge

Protect against rising grid electricity costs with fixed or predictable escalation.

20-30%Savings

Green Certificates

Receive RECs and carbon credits for your sustainability reporting and ESG compliance.

RECsIncluded

Business Models

Open Access Procurement Models

Choose the right model based on your investment appetite, consumption scale, and savings target.

Third Party PPA

Developer Owned

Developer builds and operates the plant. You buy power at fixed tariff via open access.

Zero CapEx for offtaker
Fixed tariff 15-25 years
Developer manages plant
Open access charges apply

Best for: Most enterprises

Group Captive

26% Equity Model

Offtaker invests 26% equity in SPV. Exemption from cross-subsidy and additional surcharge.

Lower tariff
CSS/AS exemption
Equity investment required
51% consumption quota

Best for: Large industrials

Captive Plant

100% Owned

Own and operate your dedicated solar park. Full control over asset and generation.

Complete ownership
Maximum savings
Asset on books
Full responsibility

Best for: Large conglomerates

Open Access Charges Breakdown

Component	Description	Typical Range
Wheeling Charges	Transmission network usage fee	₹0.20-0.50/kWh
Cross Subsidy Surcharge (CSS)	Subsidy compensation to DISCOM	₹0.50-1.50/kWh*
Additional Surcharge (AS)	Stranded capacity compensation	₹0.20-0.80/kWh*
Transmission Losses	Energy lost in transmission	3-5%
Scheduling Charges	SLDC scheduling and UI charges	₹0.05-0.15/kWh

* Exempted or reduced in Group Captive model. Rates vary by state.

State-Wise Analysis

Open Access Ecosystem by State

State	CSS Level	AS Level	Solar Potential	Notes
Rajasthan	High (₹1.20)	Low	Excellent	Top solar destination
Gujarat	Medium	Medium	Excellent	Strong policy support
Karnataka	Low	Low	Good	Favorable for open access
Maharashtra	High	High	Good	Large demand center
Tamil Nadu	Medium	Low	Very Good	Strong RE ecosystem
Andhra Pradesh	Low	Low	Very Good	Favorable tariffs

How It Works

Solar Park Procurement Process

Requirement Study

Load analysis, location, consumption pattern

Source Selection

Park identification, tariff negotiation

Regulatory Approval

Open access, SLDC, connectivity approvals

PPA & Agreements

Power purchase, banking, wheeling

Commissioning

Plant COD, metering, synchronization

Power Supply

Scheduling, billing, monitoring

Back to

Offsite Solar

Offsite Ground-Mounted