"In the Thar Desert, where the ground temperature reaches 50 degrees and the nearest town is hours away, human beings have built the world's largest machine for harvesting sunlight. The desert that was once considered a liability — too hot, too remote, too dry — has become India's most valuable renewable energy asset."
— The Energy Codex · thecodex.expert
Cluster 1 · What it is
What Bhadla Solar Park is — precisely
Bhadla Solar Park is the world's largest solar farm — 2,245 megawatts of solar panels spread across 56 square kilometres of the Thar Desert in Rajasthan, India. To put that in perspective: 56 km² is roughly the area of central Mumbai. The park generates enough electricity for approximately 1.5 million Indian homes. It is not owned by one company — it is a solar zone where the Rajasthan government allocated land to multiple private and public developers who built adjacent projects. The sun shines here for approximately 325 days a year, with some of the highest solar irradiation anywhere in India.
Technical specifications:
Total capacity: 2,245 MW across 4 phases. Phase I: 365 MW. Phase II: 680 MW. Phase III: 500 MW. Phase IV: 700 MW.
Solar resource: Bhadla receives approximately 6.0 kWh/m²/day Global Horizontal Irradiation — among India's highest. Annual GHI approximately 2,190 kWh/m²/year. For comparison, Germany (good solar location) averages 1,050 kWh/m²/year. Rajasthan's advantage is a combination of low latitude, high altitude, and arid climate minimising cloud cover.
Technology: Primarily crystalline silicon ground-mounted fixed-tilt panels in Phases I–III. Phase IV includes single-axis tracking systems. Panel tilt optimised for latitude (~27° for fixed tilt). Inverters: central and string types. DC/AC ratio approximately 1.2–1.3:1 (slightly oversized DC for better performance at lower irradiance).
Grid connection: 400 kV pooling substation at Bhadla with transmission line to PGCIL 400 kV ISTS grid. Power sold under PPAs to Rajasthan DISCOMs and central agencies (NTPC, SECI).
Total capacity: 2,245 MW across 4 phases. Phase I: 365 MW. Phase II: 680 MW. Phase III: 500 MW. Phase IV: 700 MW.
Solar resource: Bhadla receives approximately 6.0 kWh/m²/day Global Horizontal Irradiation — among India's highest. Annual GHI approximately 2,190 kWh/m²/year. For comparison, Germany (good solar location) averages 1,050 kWh/m²/year. Rajasthan's advantage is a combination of low latitude, high altitude, and arid climate minimising cloud cover.
Technology: Primarily crystalline silicon ground-mounted fixed-tilt panels in Phases I–III. Phase IV includes single-axis tracking systems. Panel tilt optimised for latitude (~27° for fixed tilt). Inverters: central and string types. DC/AC ratio approximately 1.2–1.3:1 (slightly oversized DC for better performance at lower irradiance).
Grid connection: 400 kV pooling substation at Bhadla with transmission line to PGCIL 400 kV ISTS grid. Power sold under PPAs to Rajasthan DISCOMs and central agencies (NTPC, SECI).
Source: MNRE India · GEM Solar Tracker · RRECL
Bhadla's specific energy yield is estimated at approximately 1,900–2,100 kWh/kWp/year — above India's national average (~1,650 kWh/kWp/year) owing to the high GHI. Capacity factor: approximately 23–26% (annual average). The extreme desert conditions create engineering challenges: ambient temperatures exceed 46°C in summer, reducing PV cell efficiency (cells lose approximately 0.4–0.5%/°C above 25°C STC reference). At 50°C ambient, panel surface temperatures can reach 65–70°C, reducing actual output by approximately 10–15% relative to rated capacity. This partially offsets the high GHI advantage. Soiling losses are significant: desert dust accumulates rapidly — panels require cleaning every 7–14 days. Water for cleaning is sourced from the Indira Gandhi Canal (Rajiv Gandhi Nahar), which runs through the region. Cleaning water usage: approximately 2–3 litres per kWp per wash cycle — significant in a water-scarce region. Single-axis tracking systems (Phase IV) improve annual yield by approximately 20–25% over fixed-tilt in this latitude/irradiation combination.
Source: NREL PVWatts · RRECL technical specifications · NTPC Annual Report
Cluster 13 · Named instance — phases
Bhadla Solar Park — all four phases
| Phase | Capacity | Commissioned | Developer(s) | Winning tariff / key fact |
|---|---|---|---|---|
| Phase I | 365 MW | 2016–2017 | NTPC (100 MW) · Adani Solar (100 MW) · Solairedirect (50 MW) · others | First phase — established the park. Tariffs ~₹5.5–6.5/kWh (2015 auctions). |
| Phase II | 680 MW | 2018 | Adani Solar (200 MW) · ReNew Power (250 MW) · Mahindra Renewables (100 MW) · others | Adani won at ₹2.48/kWh — then the lowest solar tariff in India (2017 auction). |
| Phase III | 500 MW | 2019–2020 | SB Energy / SoftBank Vision Fund (300 MW) · Avaada Energy (200 MW) | SB Energy bid ₹2.44/kWh (2018) — further price decline. |
| Phase IV | 700 MW | 2020 | NTPC (500 MW) · Sprng Energy (200 MW) | NTPC auction cleared at ₹1.99/kWh (2020) — lowest solar tariff in India at the time. Single-axis tracking. PPAs with RRECL. |
| Total | 2,245 MW | 2016–2020 | 7+ developers across 4 phases | World's largest solar park on completion of Phase IV (2020). |
Sources: GEM Global Solar Power Tracker (CC BY 4.0) · MNRE India · developer disclosures
Cluster 2 · Location and physical context
Where it is and why Rajasthan was chosen
The Thar Desert location
Bhadla village, Phalodi tehsil, Jodhpur district, Rajasthan. GPS: 27.5274°N 71.9199°E.
The Thar Desert: India's hottest region, summer temperatures routinely exceeding 46°C. Almost no rain (annual rainfall ~100–300 mm). The land is barren — valuable for solar precisely because it was considered worthless for agriculture. Rajasthan state government identified it as a priority solar zone under India's National Solar Mission.
Distance from population centres: 400 km from Delhi, 220 km from Jaipur, 100 km from Jodhpur. Remote enough to have low land cost; close enough to transmit power economically via the PGCIL grid.
Source: RRECL Rajasthan
The Thar Desert: India's hottest region, summer temperatures routinely exceeding 46°C. Almost no rain (annual rainfall ~100–300 mm). The land is barren — valuable for solar precisely because it was considered worthless for agriculture. Rajasthan state government identified it as a priority solar zone under India's National Solar Mission.
Distance from population centres: 400 km from Delhi, 220 km from Jaipur, 100 km from Jodhpur. Remote enough to have low land cost; close enough to transmit power economically via the PGCIL grid.
Source: RRECL Rajasthan
Why Rajasthan has India's best solar resource
Rajasthan receives approximately 6.0–6.5 kWh/m²/day GHI — the highest in India. Three factors combine: (1) Low latitude (~24–28°N) — close to the Tropic of Cancer, maximising sun angle; (2) Arid climate — very few clouds, low atmospheric moisture, minimal aerosol scattering; (3) High altitude — parts of western Rajasthan at 200–400m ASL with low humidity reduce atmospheric absorption.
This irradiation level makes Bhadla's panels generate approximately 40% more electricity per installed MW than equivalent panels in the UK, and about 20% more than average European solar locations. The LCOE advantage is enormous — Bhadla's ₹1.99/kWh winning bid translates to approximately $24/MWh.
Source: NIWE India · Solargis India Solar Atlas
This irradiation level makes Bhadla's panels generate approximately 40% more electricity per installed MW than equivalent panels in the UK, and about 20% more than average European solar locations. The LCOE advantage is enormous — Bhadla's ₹1.99/kWh winning bid translates to approximately $24/MWh.
Source: NIWE India · Solargis India Solar Atlas
Cluster 7 · Who built it
Key developers and operators
RRECL — Rajasthan Renewable Energy Corporation
The Government of Rajasthan enterprise that developed and allocated the Bhadla Solar Park as a whole. RRECL acquired the land (barren scrubland), developed common infrastructure (roads, transmission pooling substation, water supply from Indira Gandhi Canal), and ran the auctions for individual project blocks. Without RRECL's land assembly and infrastructure, the scale of Bhadla would have been impossible for individual developers. Source: RRECL
NTPC — largest single share
NTPC (National Thermal Power Corporation) is the largest single developer at Bhadla — 600 MW across Phases I and IV. The Phase IV NTPC project won the landmark ₹1.99/kWh auction in — then the lowest solar tariff ever in India, demonstrating that utility-scale solar in prime Indian locations had become cheaper than coal. NTPC supplies this power to Rajasthan DISCOMs under a 25-year PPA. Source: NTPC Annual Report
Adani Green Energy
Adani Solar (later Adani Green Energy) was among the first developers at Bhadla and holds 300 MW across Phases I and II. The Phase II Adani bid of ₹2.48/kWh was the lowest in India at the time (2017) and drew international attention to Bhadla's competitiveness. Adani is also the operator of solar parks in other Indian states, making it India's largest renewable energy company by capacity. Source: Adani Green Annual Report
SB Energy / SoftBank Vision Fund
SoftBank's SB Energy (a joint venture with Bharti Enterprises) won 300 MW of Phase III at ₹2.44/kWh (2018). This marked major international capital entering Indian solar at scale. SB Energy later sold its India renewable portfolio to Adani Green Energy in 2021 for $3.5 billion — one of the largest renewable energy transactions in India's history. Source: Adani Green press release 2021 · SoftBank Vision Fund annual report
Cluster 5 · Records and significance
What makes Bhadla historically significant
The ₹1.99/kWh moment — why it mattered globally
When NTPC's Phase IV auction cleared at ₹1.99/kWh (~$24/MWh) in , it made global headlines. At the time, the cheapest new coal power in India cost approximately ₹4–5/kWh. New solar at Bhadla had become less than half the cost of new coal — unambiguously, without subsidies, in a direct comparison.
The bid also challenged the global narrative on solar costs. Lazard's 2019 LCOE figures (US benchmark) showed solar at $36–44/MWh. India at $24/MWh was already a decade ahead of where global averages were heading. This happened because of three simultaneous advantages: India's highest irradiation, rock-bottom installed costs from Chinese equipment, and long-duration PPAs enabling low-cost financing.
This price point was not a financial error or subsidy — it was confirmed by commercial bank financing, debt from PFC/REC India, and the project's subsequent successful commissioning and operation. Source: NTPC press releases · MNRE · Economic Times India
The bid also challenged the global narrative on solar costs. Lazard's 2019 LCOE figures (US benchmark) showed solar at $36–44/MWh. India at $24/MWh was already a decade ahead of where global averages were heading. This happened because of three simultaneous advantages: India's highest irradiation, rock-bottom installed costs from Chinese equipment, and long-duration PPAs enabling low-cost financing.
This price point was not a financial error or subsidy — it was confirmed by commercial bank financing, debt from PFC/REC India, and the project's subsequent successful commissioning and operation. Source: NTPC press releases · MNRE · Economic Times India
Cluster 2 · Q9 · India context
What Bhadla means for India's energy transition
India's solar buildout context
India installed 73 GW of solar capacity by — making it the world's fourth-largest solar capacity. The 500 GW renewable target by 2030 requires approximately 350 GW of solar — meaning India needs to build roughly 30–40 GW of solar per year for the remainder of the decade.
Bhadla represents the large-scale park model — one of approximately 40+ ultra-mega solar parks planned across India under the Solar Park Scheme. Other major parks: Pavagada (Karnataka, 2,050 MW), Rewa Ultra Mega Solar (Madhya Pradesh, 750 MW), Dholera (Gujarat, 5,000 MW planned), Shakti Sthala (Karnataka, 2,000 MW).
Source: MNRE Solar Park Scheme · CEA India 2024
Bhadla represents the large-scale park model — one of approximately 40+ ultra-mega solar parks planned across India under the Solar Park Scheme. Other major parks: Pavagada (Karnataka, 2,050 MW), Rewa Ultra Mega Solar (Madhya Pradesh, 750 MW), Dholera (Gujarat, 5,000 MW planned), Shakti Sthala (Karnataka, 2,000 MW).
Source: MNRE Solar Park Scheme · CEA India 2024
The water challenge in a desert solar park
Bhadla's desert location is ideal for solar irradiation but creates a significant water challenge. Dust accumulation on panels (soiling) reduces output by 0.5–1.5% per day without cleaning. The park requires approximately 60–80 litres of water per MW per day for panel cleaning — meaning 130,000–180,000 litres/day for the full 2,245 MW park.
Water is sourced from the Indira Gandhi Canal (Rajiv Gandhi Nahar) which was specifically extended to serve the park. Alternative approaches being piloted: robotic dry cleaning systems (no water), hydrophobic panel coatings (reduce soiling adhesion), and drone-based spraying. The intersection of solar expansion and water scarcity is a key challenge for India's desert solar zone. Source: RRECL · IEA India Clean Energy Transitions 2021
Water is sourced from the Indira Gandhi Canal (Rajiv Gandhi Nahar) which was specifically extended to serve the park. Alternative approaches being piloted: robotic dry cleaning systems (no water), hydrophobic panel coatings (reduce soiling adhesion), and drone-based spraying. The intersection of solar expansion and water scarcity is a key challenge for India's desert solar zone. Source: RRECL · IEA India Clean Energy Transitions 2021
Cluster 12 · Questions
Questions people ask — answered
Is Bhadla really the world's largest solar park?
As of , yes — Bhadla Solar Park at 2,245 MW is the world's largest single solar park by installed capacity, according to the GEM Global Solar Power Tracker. However, "world's largest" rankings change regularly as new projects are commissioned. Several larger projects are under development in China, India, Saudi Arabia, and Australia. The Dholera Solar Park (Gujarat, India, 5,000 MW planned) and various Chinese desert solar zones plan to exceed Bhadla significantly. In 2020–2026, Bhadla held the world record. Source: GEM Global Solar Power Tracker (CC BY 4.0).
Source: GEM Global Solar Power Tracker CC BY 4.0 · MNRE India
How much electricity does Bhadla generate?
Bhadla's 2,245 MW is estimated to generate approximately 4,500 GWh (4.5 billion kWh) per year at approximately 23–25% capacity factor — typical for fixed-tilt solar in this location. 4,500 GWh is enough to supply approximately 1.5 million average Indian homes for a year (at approximately 3,000 kWh/home/year for urban households). The Phase IV tracking system (700 MW) generates closer to 28% capacity factor. Actual generation data from NTPC's annual reports confirms commissioning and dispatch to the Rajasthan grid. Source: NTPC Annual Report 2023-24 · CEA India generation statistics.
Source: NTPC Annual Report · CEA India Monthly Generation Data
Why is solar in Rajasthan so cheap?
Bhadla's ₹1.99/kWh (~$24/MWh) is cheap for four compounding reasons: (1) Irradiation: Bhadla receives ~6.0 kWh/m²/day — 40% more than UK and 20% more than Europe, meaning the same panel generates more electricity and spreads the capital cost over more kWh. (2) Equipment cost: Chinese solar modules at ~$0.15–0.20/Wp and Chinese-manufactured inverters made project CapEx approximately $400–500/kWp — among the world's lowest. (3) Long-duration PPA: 25-year fixed-price PPAs with creditworthy government buyers enable projects to finance at approximately 8–9% WACC instead of 12–14% — significantly lowering LCOE. (4) Low land cost: RRECL provided land at nominal lease rates (barren desert). All four factors together, not any one alone. Source: Lazard LCOE 2020 · MNRE India.
Source: MNRE India · Lazard LCOE 2020 · RRECL
What problems does Bhadla face?
Three main challenges. (1) Soiling and water: Desert dust reduces output by 0.5–1.5%/day without cleaning. Cleaning requires water in a water-scarce region. Robotic cleaning systems are being piloted. (2) Heat: Ambient temperatures of 46–50°C in summer reduce panel efficiency significantly — panels lose ~0.4%/°C above STC 25°C, so at 65°C actual panel temperature, output is reduced by ~10–15% from rated. (3) Transmission: Rajasthan's renewable generation significantly exceeds state demand on sunny days — curtailment occurs when transmission lines to demand centres (Delhi, Mumbai) are insufficient. Green Energy Corridors are being built to address this. Source: CEA India · MNRE · IEA India 2021.
Source: CEA India · MNRE India · IEA India Energy Sector Review 2021
Connected pages
Sources
MNRE IndiaSolar Park Scheme · Bhadla capacity and policy contextmnre.gov.in
CEA IndiaGrid connection · Generation statistics · Transmission datacea.nic.in
GEM Solar TrackerGlobal Solar Power Tracker · GPS, capacity, phase data · CC BY 4.0globalenergymonitor.org/solar-tracker
NTPCPhase I and IV developer · Annual Reports 2020–2024ntpc.co.in/annual-reports
Adani Green EnergyPhase I and II developer · Annual Report 2024adanigreenenergy.com/investors
RRECLRajasthan Renewable Energy Corporation · Land and infrastructure developmentrrecl.energy.rajasthan.gov.in
NIWE IndiaNational Institute of Wind Energy · Solar resource data for Indianiwe.res.in