PVInstaller Training – National certification Programme for Rooftop SPV.

Do you want to became a skilled solar PVInstaller..?

If Yes, It’s a perfect opportunity for you.. Let’s join National Certification programme for Rooftop Solar Photovoltaic Installer at India’s award-winning Solar training institute GERMI. 


About the Organizers
             Gujarat Energy Research and Management Institute (GERMI) is a recognized as a center for excellence of SCGJs Skill Council for Green Jobs) in industry learning, research & development, and education. GERMI is set up to develop human resource assets to cater to the renewable and non-renewable energy sectors, improve knowledge base of policy makers and technologists, and provide a competitive edge to leaders to compete in the global arena. GERMI is promoted by Gujarat State Petroleum Corporation (GSPC) Ltd., an undertaking of the Gujarat Government. GERMI is designated as a Scientific and Research Organization (SIRO) by the Department of Scientific and Industrial Research (DSIR), Govt. of India.

Date and Venue
Course Date: 18-28 June, 2018.
Duration       : 11 Days
Course Type: Non-residential

Course Venue
Gujarat Energy Research and Management Institute,
Pandit Deendayal Petroleum University Campus, Raisan,
Gandhinagar – 382007 Gujarat, India.

Course Contents
The workshop will be conducted in a ‘participative mode’ wherein each session builds upon the previous. Topics covered during the course duration will be:

  • Understand the basics of electricity and solar energy,
  • Survey a rooftop solar PV installation site,
  • Understand all equipment related to the rooftop solar PV system,
  • Design a rooftop solar PV system as per Customer’s requirements as well as appropriate codes and standards,
  • Prepare the necessary technical documents related to the design, installation and operation of the rooftop PV system,
  • Install a rooftop solar PV system based on the relevant designs and drawings,
  • Operate and maintain a rooftop solar PV system including identification and troubleshooting of faults,
  • Ensure safety while installation and operation of the rooftop PV system,
  • Undertake project management for installation of a rooftop solar PV system,
  • Understand necessary formalities with authorities for applications, submissions, approvals, interconnections, inspections, certifications, commissioning, etc.,
  • Prepare preliminary techno-commercial proposals for Customers.

Who should attend?

  • Administrators and decision makers in the private and public sectors, and Governments.
  • Photovoltaic design and project engineers.
  • Entrepreneurs exploring the field and value chain of solar energy.
  • Professionals from stakeholder industries such as banking, accounting, architecture, etc.
  • Engineering faculties and students.

Note – Eligible participants will also be certified by skill council for green job’s, Govt. Of India.


Off-Grid stand-alone photovoltaic system Basic Design with technical specification.

As we know stand-alone (off grid) photovoltaic system is powering loads that are not connected to the utility grid.

Few main advantages is Gain energy independence & Access to electricity or reduce diesel generator costs for your home. Let’s first we focused on Technical Specifications of BOM.

  1.  PV MODULES – PV modules must conform BIS Standards IEC 61215 / IS14286/IEC 61730. Each PV module must use a RF identification tag (RFID), which must contain the Month and year of the manufacture (separately for solar cells and module), Country of origin (separately for solar cells and module), I-V curve for the module, Peak Wattage, Im, Vm Temp. for the module.
  2. BATTERY BANK – The batteries shall be solar photovoltaic batteries of flooded electrolyte, low maintenance, lead Acid. The Storage batteries should conform IEC 61427 / IS 1651 / IS 13369 as per specifications. There must be Battery protection panel and contain suitable wooden rack, hydrometer, thermometer, cell tester and connecting leads etc.
  3. Power Conditioning Units (PCU) – PCU refers to combination of Solar charge controller and inverter and shall be supplied as integrated unit. PCU should conform IEC 61683, IEC 60068 as per specifications. while selecting PCU we must have to consider Switching device, Input voltage from PV array, Protections eg. (Short circuit protection, Input under voltage / Deep discharge of battery, Input surge voltage protection, Over current,  Battery reverse polarity protection etc.), Cooling, Sine-wave output with THD at full load UPF and nominal input voltage, AC charger input & %Regulation.
  4. Charge Controller Unit (CCU) – The charge controller, controls the output of the solar array and prevents the batteries from being overcharged. There are two basic types available a PWM and a MPPT. Charge Controller Unit shall be dual input type from SPV & Grid Main Supply, however the input is fed from a SPV panel only for battery charging. The charge controller shall be preferably PWM type employing IGBT switching elements. Charge controller should conform IEC 62093 / IEC 60068 as per specification. while selecting CCU we must know following, Protections – (Short Circuit, Deep Discharge, Input Surge Voltage, Over Current (load), Battery Reverse Polarity, Solar array reverse polarity) Also there is requirements of following indication (String ‘ON’, Main ‘ON’, Charging ‘ON’, 80% Charged, 100% Charged, Charger Overload, Battery On Trickle. Battery disconnected / Fault Battery Reverse Polarity, Low Solar Power, System Fault and Charger over Temperature and Input Over / Under Voltage (for AC).
  5. DC DISTRIBUTION BOARD (DCDB) – A DCDB shall be provided in between PCU and Solar Array. It shall have MCCB of Suitable rating for connection and disconnection of array section. It shall have meters for measuring Array voltage and Array current.
  6. Inverters – Inverters shall be of very high quality having high efficiency and shall be completely compatible with the charge controller and distribution panel. Inverter should conform IEC 61683, IEC 60068 as per specifications. while selecting inverter consider following – Nominal Capacity (KVA/Kwp), Input Voltage, Efficiency, Overload Capacity, Regulation, Total Harmonic Distortion may be Less than 3%, Protection – (Over Voltage both at Input & Output, Over Current both at Input & Output, Over Frequency, Surge voltage inducted at output due to external source.)
  7. Cables & Wirings – Cables shall be conforming to IEC 60227/ IS 694 & IEC 60502/ IS 1554 & Voltage rating – ( 1,100V AC, 1,500V DC). For the DC cabling, Solar Cables, XLPE or XLPO insulated and sheathed, UV stabilised single core flexible copper cables shall be used. Multi-core cables shall not be used And For the AC cabling, PVC or XLPE insulated and PVC sheathed single or multi-core flexible copper cables shall be used. Generally above 5kwp system the minimum DC cable size shall be 6.0 mm2 copper. The minimum AC cable size shall be 4.0 mm2 copper. In three phase systems, the size of the neutral wire size shall be equal to the size of the phase wires. The following colour coding shall be used for cable wires: − DC positive: red (the outer PVC sheath can be black with a red line marking)  − DC negative: black  − AC single phase: Phase: red; neutral: black  − AC three phase: Phases: red, yellow, blue; neutral: black  − Earth wires: green.
  8. Earthing and lightning protection – Earthing is essential for the protection of the equipment & manpower. Two main grounds used in the power equipment’s are (System earth & Equipment earth). System earth is earth which is used to ground one leg of the circuit. For example in AC circuits the Neutral is earthed while in DC supply +ve is earthed. And equipment earth all the non-current carrying metal parts are bonded together and connected to earth to prevent shock to the man power & also the protection of the equipment in case of any accidental contact. The Earthing for array and distribution system & Power plant equipment shall be made with GI pipe and GI strip.
  9. MODULE MOUNTING STRUCTURE – Hot dip galvanized iron mounting structures may be used for mounting the modules / panels / arrays. The Mounting structure shall be so designed to withstand the wind speed of 150 km/ hour. The mounting structure steel shall be as per latest IS 2062: 1992 and galvanization of the mounting structure shall be in compliance of latest IS 4759 with thickness of 80 microns as per IS 5905. All fasteners shall be of Stainless steel – SS 304. The foundation for Module Mounting structures shall be 1:2:4 PCC Construction and must take care there shall be minimum necessary clearance between ground level and bottom edge of SPV modules.

Let’s we Look forward about steps to basic design of solar off-grid system.


Step 1 – Determine the Total Load.

As we know the Electrical energy usage is normally expressed in watt hours (Wh) or kilowatt hours ( kWh ).

( power of the appliance – W) x (Number of hours per day it will operate – Hours/day) =                 ( Energy consumed by that appliance per day – WH/day.)

To determine the daily energy usage for an appliance, multiply the power of the appliance by the number of hours per day it will operate. The result is the energy (Wh) consumed by that appliance per day.

Step 2 – Determine the sizing PCU & Battery bank.

  • As we know System voltages are generally 12, 24 or 48 Volts. The actual voltage is determined by the requirements of the system.
  • For example, if the batteries and the inverter are a long way from the energy source then a higher voltage may be required to minimise power loss in the cables. In larger systems 120V or 240V DC could be used, but these are not typical household systems.

Note – The recommended system voltage increases as the total load increases. For small daily loads, a 12V system voltage can be used. For intermediate daily loads, 24V is used and for larger loads 48V is used.

Step 3 – Determine the sizing of SPV needed.

The size of the PV array should be selected considering seasonal variation of  – solar irradiation & the daily energy usage, Battery efficiency etc

The basic formula is Array Size Needed = (Load) x (MPPT Controller Loss) / (Sun Hours).

  • For general calculation to determine number of modules in series, divide the system voltage by the nominal operating voltage of each module.
  • For general calculation to determine the number of strings in parallel, the PV array output current required (in A) is divided by the output of each module (in A). 

Note – Number of modules connected in series & parallel is depending upon system designer.

  • Step 1 – Determine the Total Load.

AC Load Example, 230Vac

Load 1 – 100W x 4 Hours/day = 400 WH/day.

Load 2 – 50W x 6 Hours = 300 WH/day

Load 3 – 100w x 3 Hours/Day = 300 WH/day

Total Load = 1000 WH/day @ 230Vac.

  • Step 2 – Determine the sizing PCU & Battery bank.

Proper battery bank sizing is important for the operation of the SPV. The basic calculation for this step is

Calculation 1

(Load AH/day) = (Load WH/day) / Base Battery Voltage

(Load AH/day) = (1000) / 24V = 41.66 AH/D @ 24V

Calculation 2

(AH Battery Bank Size Needed) = (Load AH/day) x (Days of Autonomy) / (Max DOD)

(AH Battery Bank Size Needed) = (41.66 AH/D) x (2) / (0.80) = 104.16 AH @ 24V of Battery Needed.

Let’s say we have 150AH, 12V Battery, we need two batteries in series connection.

Calculation 3 – Solar charge controller – It’s calculate based on PV module specification. If we consider

Pm = 100Wp, Isc = 6 Amps, Voc = 16.7Vdc.

Solar charge controller = (3 Pv Module * 6A) x 1.3 = 23.4 A i.e we select 30A, 12V charge controller.

Calculation 4Selection of inverter 

Selection of Inverter depends on factors such as cost, surge requirements, power quality and for inverter/chargers, a reduction of the number of system components necessary. The selected inverter should be capable of supplying continuous power to all AC loads AND providing sufficient surge capability to start any loads that may surge when turned ON.

From the Total load  (energy) assessment , a selected inverter must be capable of supplying 400VA continuous with a surge capability.

  • Step 3 – Determine the sizing of SPV needed.

Array Size Needed = (Load) x (MPPT Controller Loss) / (Sun Hours)

Array Size Needed = (1000 x 1.10) / (4) = 275 watts of solar modules is needed.

If we using a 100 watt module we need 3 solar modules.

Conclusion :-

1) SPV – 100wp – 3Nos.

2) Battery required – 150AH, 12V. – 2 Nos.

3)Charge Controller – 12V, 30Amp.

4)Inverter – 400VA or greater. Other BOM as per system requirement.

Note – it’s just a simple design.. For bigger load we also have to consider different parameters as per requirements.



Start-up Challenge – Solar Chulha.

Solar Chulha Challenge


ONGC announced a Rs 100 crore Start-up fund on its 60th foundation day, i.e. on 14th August 2016 to foster, nurture and incubate new ideas related to energy sector. The initiative, christened as ‘ONGC Start-up Fund’, is in line with the ‘Start-up India’ initiative launched by the Hon’ble Prime Minister of India on January 16, 2016.

‘ONGC Start-up Fund’ shall cater to start-ups in the “Energy Sector” and will provide the entire support chain including seed capital, hand-holding, mentoring, market linkage and follow-ups. The aim of ‘ONGC Start-up Fund’ is to increase the contribution of fresh implementable ideas in the oil and gas sector by creating an ecosystem that is conducive for promoting innovation and growth of the startups.

On the occasion of Pd. Deendayal Upadhyay’s birth anniversary on 25th September 2017, Hon’ble Prime Minister has exhorted ONGC to take up a challenge to work towards making an “efficient electric chulha (stove)”, which would enable cooking using the solar power (the text of the Ho’ble PM speech is placed at Annex. 1). Inspired by the words of Honble Prime Minister, ONGC is launching a public innovation challenge to seek innovative solutions for development of Solar Chulha.

Need for a Solar Chulha

About 700 million people in India live in households that cook every day with simple chulhas using locally gathered biomass for fuel. This results in substantial air pollution exposures in and around the households but is also an important contributor to outdoor air pollution- estimated to be responsible for more than 25% of the country’s outdoor air pollution. These exposures are estimate to result in the premature death of more than 8 lakh Indians each year, with the greatest risk for women and young children. In addition, gathering biomass fuel often requires many hours per week that could be put to more productive activities and in some parts of the country contributes to land degradation and deforestation.

Approaches to clean household cooking are thus urgently needed to supplement the promotion of LPG now occurring nationally so that everyone can benefit. Fully extending grid electrification, as is planned by the GOI, offers one option in conjunction with solar supplementation to avoid stress on the grid from cooking, which occurs daily at the same time in most communities. This can only happen, however, if appropriate solar-powered electric cook stoves with battery support can be developed. They can be used in a stand- alone form if no grid electricity is available, or in a hybrid form to supplement power coming through electrification schemes.
Solar cooking involves converting and controlling the sun’s heat and light energy on site to cook food. Being clean and not requiring the gathering or purchase of fuel, solar energy also has the attractions of being renewable and locally available. The main disadvantage of past solar cooking techniques is that they have no ability to store energy and most households are not able or willing to cook when the sun is high in the sky, when the devices can provide sufficient power for important cooking tasks. Solar energy storage in the form of steam or hot oil is used for institutional cooking in India, for example in ashrams or schools, but is too expensive and complex for households.

ONGC Innovation Challenge – Solar Chulha

ONGC is organising a challenge to develop at reasonable cost an effective and versatile solar-powered stove system that

  • Cooks both at night and during the day,
  • Can be used for all cooking processes (boiling, steaming, frying),
  • Is safe and easy to use,
  • Is built with materials that are available easily and can be disposed of safely,
  • Can be mass produced to achieve good quality control and economies of scale, and
  • Can be used independently or in conjunction with some power from the grid.

The deliverables and boundary conditions of the proposed challenge are as follows:

Description of the Solar Chulha Challenge

ONGC invites Entrepreneurs/Scientists/Researchers (as individuals or in groups) with interest in innovation, to participate in the Indigenous Development effort on Design, Development and Demonstration of Solar Chulha, suitable for indoor cooking of Indian food (including frying, baking and chapati making).

1. The broad performance features expected from Solar Chula among other things include:

  • Solar Chulha should work on solar energy (solar thermal or PV) or any other renewable energy as source of energy which can be easily accessed or made available in any house hold kitchen.
  • It should be possible to keep the chulha all time inside the kitchen for cooking purposes (including frying, baking and chapati making), similar to traditional commercially available cook stoves which work on LPG or other fuels.
  • It should be possible to use the Solar chulha on need basis any time during the day/night (24X7) basis.
  • It should be suitable for built up of materials which are easily available and can be disposed safely and can be mass produced with economies of scale.
  • It can be used independently or in conjunction with the grid, as the case may be.
  • The solar chulha must meet safety requirements for use in any house hold.
  • It should be able to provide sufficient meals for a family of five. During the night time it will work on stored energy with energy storage, having a life of around 2500 cycles.

2. The estimated cost of the solar chulha along with the energy source preferably not exceed Rs. 10,000/- per unit. ( For a volume of few lac units).


1. The Challenge is open to Entrepreneurs/Scientists/Researchers (as individuals or in groups) with interest in innovation.

2. The following persons and their immediate relatives cannot participate in the Challenge:

  • An employee of ONGC directly involved in execution and evaluation of the Challenge.
  • A member of the Evaluation panel, Experts and Jury for the Challenge.

3. In addition, young students from academic and research institutions, can also participate through the 3rd National Competition 2017, on Design, Development and Demonstration of Solar Chulha, suitable for indoor cooking of Indian food (including frying, baking and chapati making), announced by  ONGC Energy Centre, which has been set up by ONGC to undertake or assist/collaborate in research for developing and/or improving the energy mediums  and sources, especially in clean and renewable energy options. (Please see details at http://www.ongcindia.com/wps/wcm/connect/ongcindia/home/ongc-energy-centre under News/Tenders/Advertisement tab – 3rd National Competition 2017).

For Application Formats & General Guidelines, Terms and Conditions Click here.

Solar Skills Competition in Renewable energy India Expo 2017.

“Solar skill competition” in Renewable energy India Expo on 21st september 2017 at 10.30 a.m. onwards at India Expo center, Greater Noida.

  • About Solar skill Competition

UBM group under the guidance of skill counsil for green jobs is launching the “Solar skill competition” in Renewable energy India Expo on 21st september 2017 at 10.30 a.m. onwards at India Expo center, Greater Noida. The competition will focus on workmanship & accuracy, installation procedure, speed & timing for installation and healthy & safety aspect. The event will mark a begining of compititive & quatily learning amongest presonnel in this sector; and would also exhibit industry’s commitment towards “Skill India Mission” of Government of India. The competition would be for installation of 1 KWP Solar PV System.

Give a Boost to your Organization and your Solar Career…!!

Note – The techinical equipment will be provided at the venue and the participating teams will be awarded and felicitated for their performance.

For more detail & Registration Click Here

Contact –  Bajindar Kaur | Mob: + 9188505 40 947 | Email : Bajindar.kaur@ubm.com

India aims to add over 10,000 MW solar energy this fiscal

India will achieve the target for adding 10,500 MW solar power capacity in the current fiscal, New and Renewable Energy Minister Piyush Goyal said on Friday. “The way things are progressing in solar energy sector, we will definitely achieve our target. Solar energy is economically viable,” he said at the Concentrated Solar Thermal (CST) and …

Source: India aims to add over 10,000 MW solar energy this fiscal