Power & Renewable Energy

The energy sector is ever transient with emerging technologies and societal demand promising to reshape not only the energy we use, but also how we use it. Energy which is always produced and used in the context of an increasingly complex energy ecosystem is characterised by price volatility, regulatory changes, and new technology adoption/ up gradation. In such a scenario, the biggest challenge for the energy industry is to continually adapt to the speed and efficiency of generation, transmission and distribution to match the peaks and troughs of consumer demand- all this while giving due importance to mainstream sustainability in investments.

We at GreenStratos understand the importance of including all aspects of energy to provide a holistic solution to our clients. Whether you seek to explore feasibility, adapt or update new technology, understand the energy policy implications and get answers on technical queries, our consulting team will provide innovative solutions across the entire spectrum of power generation, transmission and distribution.


Our energy sector services are divided into the following categories



Our energy practice is driven by the core objective of developing and promoting renewable energy sources like solar, wind, hydro and bio mass. To this end, our services address all areas of significance that influence the overall shift towards a ‘Clean Energy Transformation’ as outlined below

  • Energy Security: Reduce Dependency on conventional power
  • Develop Energy Markets: Stimulate Economic Activity
  • New Initiatives: Devise Frameworks for Renewable Energy/Energy Efficiency
  • Strengthen Public Policy Frameworks: Develop the overall sector
  • Regulatory Mechanism: Streamline Administration

GreenStratos provides professional consulting services to address the needs of promoters setting up or intending to set-up renewable power projects.

Our consulting expertise encompasses all realms of renewable energy, and we differentiate ourselves on our ability to offer turnkey project solutions through our strong network of implementation partners across various streams of renewable. Through this strategy, our clients stand to gain significant cost and time savings in their project initiatives.


Our services include-


  • Markets and Regional energy requirement analysis
  • Technology evaluation/strategy
  • Business Plan Development
  • Project Implementation Strategy
  • Opportunity Evaluation and Market Research
  • Transaction Advisory for acquisition and disposition of Energy assets
  • Partnership/JV advisory


  • Renewable resource assessment
  • Feasibility Studies
  • Site Selection and Energy Mapping
  • Detailed Project Reports
  • Transaction facilitation
  • Legislative compliance Verification and Auditing (with the state-level and central-level regulatory authorities)
  • Tariff negotiations and PPA Advisory
  • Assistance for Financial Closure
  • Detailed Engineering Services
  • Owner Engineer Services
  • Project Planning and Management from construction phase upto project commissioning


  • Operation and Maintenance contracts
  • Performance review and benchmarking
  • Business Plan Development
  • Asset optimization
  • Liasioning and trading for carbon incentives


We at Green Stratos believe that, the energy future is going to be dominated by solar power which is an inexhaustible, clean, safe and reliable form of energy.

Fast Facts about Solar-
  • Solar energy is the most abundant energy resource on earth.
  • Direct conversion of sunlight into electricity uses one of three technologies: (1) Photovoltaic (PV) Cells; (2) Concentrating Solar Panels (3) Solar Thermal Collectors for heating and cooling addressing various needs
  • PV has become a commercially available and reliable technology with a significant potential for long-term growth
  • Grid parity will be achieved in an increasing number of countries over the next decade.
  • Switching to solar will ease the long term sustainability concerns of a business or a community

GreenStratos provides quality design, reliable engineering and professional project management for the installation of solar based power generation solutions (both Grid Connected as well as Off Grid).


Transaction Facilitation
  • Identification of ideal locations for setting up of solar power plants based on Direct Normal Irradiance (DNI) and governance environment for investment in the solar sector
  • Facilitate application and processing at State Nodal Agencies to obtain in-principle approval
  • Assist corporations in bidding under various solar power schemes across the nation
  • Procurement of land
  • Interfacing with Solar Energy Authority at Ministry of New & Renewable Energy (MNRE) for securing approval
  • Facilitating Power Purchase Agreement (PPA)
  • Tender preparation & negotiations for supply and EPC
  • Assessing Solar DNI trends to understand the site potential
  • Site survey – Terrain, availability of water, study of climatic patterns
  • Study of site access as well as grid access conditions
  • Assess suitability of various technology options such as solar PV, solar thermal (concentrated solar power) or hybrid for the site conditions
  • In case of more than 1 site being evaluated, prepare a matrix to map the sites ‘vs’ technology options
Detailed Project Report
  • Collation of field level data based on site survey and desk review data such as DNI
  • Description of technology proposed for the solar power plant with detailed justification
  • Estimation of optimum power generation based on recommended technology
  • Estimation of project costs with broad and detailed break-up under major heads
  • Solicit quotes from technology suppliers, prepare financial projections including P&L, balance sheet, cash flow statement and key financial indicators
  • Implementation schedule with key milestones

Financial Closure
Project Management



Power generated by harnessing the kinetic energy of flowing water is one of the earliest forms of renewable energy sources for mankind. Hydro Power is one of the cleanest sources of energy with no fuel requirement and absolutely no Green House Gas emissions. There is significant existing capacity and even higher unexploited hydro power potential across the world.


Green Stratos provides the following services in the Hydro Power sector

Transaction Facilitation
  • Facilitate identification of potential Hydel sites/licenses
  • Assist in obtaining various Govt. clearances for the project
  • Due-diligence – Technical, legal and financial analysis and support decision making in acquisition of hydro licenses
  • Negotiations and finalization of PPA-Power Purchase Agreement (either 3rd party or state grid)
  • Tender preparation & negotiations for supply and EPC
  • Facilitate subsidy claims for Hydro projects and ensure timely realization

Pre-Feasibility and Feasibility Studies

The following are the important activities that we execute as part of hydro-feasibility study

  • Site survey – Land, Power Evacuation, ease of construction
  • Establishment of appropriate bench marks.
  • Topographical Surveys and Studies
  • Hydrological studies - Collection and analysis of flow data
  • Geological and Geo-Technical Investigations
  • Establish regional geology
  • Identify the location of faults if any in the area, Seismicity, ground water, rock stability.
  • Identify the suitability for construction materials, earth fill, aggregate, sand etc.
  • Make test pits and log results.
  • Make bore logs at suitable locations.
  • Preliminary Designs and Material Estimates
  • Costing and Financial Analysis
  • Techno-Commercial feasibility analysis
Detailed Project Report
  • Review and analysis of hydrological and other field level data
  • Formulation of alternatives for the water conductor system and selection of optimum scheme from techno-economic consideration
  • To carry out power studies in order to:
  • Determine optimum installed capacity of the scheme
  • Design parameters of the proposed generating unit
  • Possible annual generation
  • Selection of type, number and capacity of Turbine Generator units.
  • Details of scheme covering civil, mechanical and electrical aspects.
  • Project cost estimates, unit cost of generation and financial analysis.
  • Environmental Impact Assessment
  • Resettlement and Rehabilitation Studies
  • Socio-economic impact assessment studies
  • Implementation schedule
Project Management
  • Bidding and Selection of EPC contractors
  • Supervision and review of EPC works
  • Timeline management
  • Quality and Safety Management
  • Performance review
  • Owner’s engineer services
  • Liasioning with government officials for synchronization and commissioning of the project
  • Use 3-5 project site images with the name of the project on the picture
  • GreenStratos has 3000 MW of Hydro Power Consulting Experience



History is replete with examples of communities harnessing the power of wind. Now, the need to reduce greenhouse gas emissions and secure home-grown energy supplies has deemed wind energy as the world’s fastest growing renewable energy type.

Wind energy installations range from large commercial wind farms to smaller developments, ideal for generating power for a household, farm or local community. A single 2.5MW wind turbine (depending on local wind speeds)can generate enough electricity to meet the annual needs of over 1,400 households, make 230 million cups of tea, or run the average computer for well over 2,000 years.

GreenStratos provides comprehensive technical support for both onshore/offshore commercial wind farms to small household developments. Our services encompass development, erection as well as O&M of wind energy installations

  • Site Identification
  • Micro-siting
  • Wind Resource Assessment and projections of power generation
  • Feasibility Studies
  • Detailed Project Report including Detailed Financial Analysis
  • Recommend Technical Specifications
  • Clean Development Mechanism
  • Project Management



Thermal power is generated when a fuel is used to heat water, this gives off steam at high pressure, which in turn drives the turbines to create electricity. There are various energy sources harnessed to turn the generator and it chiefly depends on the fuels used and their availability

Thermal power plants are mainly classified by the type of fuel used:

  • Fossil fuel power plants: Coal thermal plants use coal as the fuel and steam turbine generator. Gas thermal plants use natural gas and combustion turbine.
  • Nuclear: Nuclear power plants use the heat generated from a nuclear reactor to operate a steam turbine generator.
  • Geothermal: Geothermal plants use steam trapped and extracted from hot underground rocks
  • Industrial Sources: Waste heat from industrial processes, blast furnace exhaust gas
  • Solar Thermal: Electric plants which use solar power to boil water, which in turn drives the generator


Coal is the most abundant and widely spread fossil energy resource worldwide. Coal-fired power plants are among the oldest power plants in operation in the world. The development of coal-fired power generation in the global market depends to a large extent on the competitive position compared to gas-fired power, nuclear power, etc.

The main drawback with coal based power generation is the emissions of greenhouse gases such as Sox (Sulphur Oxide) and Nox (Nitrogen Oxide)gases which depend upon the Suplhur and Nitrogen content in the coal hence coal with low content of suplhur and nitrogen are usually considered for power generation.

There are different types of Coals available globally which vary upon their chemical composition. The rank of coal is based on the degree to which the original plant material has been transformed into carbon and can be seen as a rough indication of how old the coal is: the older the coal the higher the carbon content (generally). The ranks of coal (from most to least carbon content) are as follows: anthracite, bituminous coal, sub bituminous coal, and lignite. The coal with the highest carbon content is the best and cleanest type of coal to use. As you move down the coal rank the heat given out decreases and the dirtiness of the fuel and moisture content increases.


GreenStratos is at the forefront of providing a wide range of technical and professional services to the thermal power generation sector.

  • Pre-feasibility/feasibility reports
  • Procurement assistance/Vendor development
  • Man Power Selection
  • Project management
  • Due Diligence and the provision of services associated with divestiture or acquisition of portfolios
  • Preparation of environmental impact assessments and the provision of all of the necessary planning support
  • Operations permissions and Compliance
  • Environmental Monitoring and Reporting
  • Geotechnical Assessments and the management of any necessary site investigations
  • Investment Grade Energy Audit
  • Carbon Advisory

1. Coal Rank Chart

Low Rank High Rank
Rank: Lignite Subbituminous Bituminoua Anthracite
Age: >>>>>>>>>>>INCREASES>>>>>>>>>>>
% Carbon: 65 - 72 72 - 76 76 - 90 90 - 95
% Hydrogen: ~5 <<<<<<<<<<<DECREASES<<<<<<<<<< ~2
% Nitrogen: <<<<<<<<<< ~1-2 >>>>>>>>>>>
% Oxygen: ~30 <<<<<<<<<<<DECREASES<<<<<<<<<< ~1
% Sulfur: ~0 >>>>>>>>>>> ~4 <<<<<<<<<< ~0
% Water: 70 - 30 30 - 10 10 - 5 ~5
Heating Value (BTU/lb): ~7000 ~10,000 ~12,000-15,000 ~15000

2. Coal is approximately 57% of the total fuel mix for electricity generation in India.



Biomass is another form of clean energy derived from any organic, renewable material that can be used in either raw or processed form. Some of the biomass fuel sources are:

  • Fast growing shrubs, trees and grasses.
  • Rice husk, jute, cotton, bagasse, coconut shell, cow dung, wood from off-cuts of the saw-milling industry, tree prunings, sawdust, wood chips, etc.
  • Municipal wastes.

Biomass can be used in three ways: as biogas to gasifiers for thermal applications, in the form of methane gas and direct combustion of biomass to produce power.

BIOMASS POWER PLANTS: Modern biomass technology is clean, efficient, fully automated and exempt from the Climate Change Levy. Biomass systems are available for a wide range of situations and the technology can range from direct combustion, where the steam produced turns turbines and drives generators to produce electricity, to the newer, more energy efficient methods such as gasification. Here the fuel is converted into a combustible gas used directly in a gas turbine, which then drives a generator. Gasifying biomass can be up to twice as efficient as burning it and produces fewer greenhouse gas emissions.

  • Biomass Resource Assessment
  • Availability of biomass and proximity to source
  • Biomass seasonality, type, surplus and ease of sourcing
  • Assess agricultural residues and agro-industrial residues
  • Alternative consumption/uses of biomass in the fuel collection area
  • Assess domestic and commercial usage of biomass in the collection area
  • Biomass collection, costs, sensitivity analysis
  • Power generation potential and determine optimum plant capacity
  • Site survey – Terrain, availability of water, study of climatic patterns
  • Study of site access as well as grid access conditions
  • If site is not already identified, recommend appropriate site for setting up the plant
  1. Biomass Resource Conversion Process

  2. Calorific Values of different Biomass raw materials

    Approx heating value Kcal/Kg
    Dry State
    Approx heating value Kcal/Kg
    1 Wood 1500 3500
    2 Cattle dung 1000 3700
    3 Bagasse 2200 4400
    4 Wheat and rice straw 2400 2500
    5 Cane trash, rice husk, leaves and vegetable wastes 3000 3000
    6 Coconut husks, dry grass and crop residues 3500 3500
    7 Groundnut shells 4000 4000
    8 Coffee and oil palm husks 4200 4200
    9 Cotton husks 4400 4400
    10 Peat 6500 6500
    11 Bio gas(Kcal/cu mtr) (12 kg of dung produces 1 cu. Mtr gas) 4700-6000