Solar Rooftop Scenario – Maharashtra

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Maharashtra State Net metering policy highlights

Eligible Consumer
  • Wants to setup a Solar Plant up to a maximum capacity of 1 MW (subject to Technical Constraints explained ahead)
  • On Rooftop or any other Mounting Structure (Ground, Shed and Superstructures etc) in his premises
  • to meet all or part of electricity requirement including Consumer catering to common load (Housing Society Community Halls, Pumping stations etc)
  • Such System maybe owned by Consumer directly or by 3rd Party leasing such system (opening up the market to investors who will setup the power plant FREE to sell electricity to the consumer at a cost less than what Distribution Companies offer)
Capacity Limitation (Due to transformers)

The cumulative capacity of all solar plants connected to a Distribution Transformer (which is the closest grid transformer from which we receive electricity) should not exceed 40% of its capacity. The Distribution Company may allow for more after conducting a Detailed Load Flow Study,

The Distribution Company shall:
  • Put on its website, the information of available capacity of Distribution Transformers within 3 months (10th Dec, 2015) of the notification (10th Sept, 2015)
  • Update the capacity available quarterly within 1 month of ending of the quarter
First Come & First Serve

Since there are technical limitations set out in the policy for the maximum capacity of Solar plants that can be connected to the distribution transformer of the Electricity Distribution Company, the permission for Net Metering would be given on First Come, First Serve basis with a priority to already installed Solar Plants.

Duration of net metering agreement

After the approval for Net Metering, but before the commissioning of the system, the distribution company and the consumer would enter into a Net Metering Agreement for a duration of 20 years.


In case the solar generation would be used to meet RPO of the consumer, then the meter for measuring solar generation has to be put at the cost of the consumer, but if the Distribution Company meets its RPO through this solar generation, then the Discom would pay for the meter

No deemed generation

Solar Power Plant (without battery backup) won’t be able to generate electricity without Grid Connection, so the electricity lost during the time that the grid was not available cannot be claimed from the Distribution Company.

Other approval

Other Approvals from Municipality, Chief Electricity Inspector etc have to be taken which are applicable to any solar system irrespective of Net Metering.


Technical Aspects of Maharashtra Net Metering Policy 2015

Sanctioned Load

The capacity of the Solar Plant proposed cannot exceed the Contract Demand or Sanctioned Load of the Consumer. The variation of 5% is allowed, however.

Capacity Limits (due to Voltage)

The following capacity limits have been proposed in the Maharashtra Net Metering Policy, 2015.

HT Consumers

  • The HT Consumers (11 kV and above) would connect the solar plant on their LT bus bar system, but metering would be on HT side of the transformer.

Battery Backup Systems

  • For solar plants with battery backup, the inverter shall have a separate back-up wiring – automatic and manual – to prevent the power from flowing into the grid in absence of grid supply.


Commercial Aspects of Maharashtra Net Metering Policy 2015

Application Fees

For consumers with sanctioned load of less than 5 kW, registration fees of Rs. 500 needs to be paid with the application form, which for consumers having sanctioned load of more than 5 kW, fees of Rs 1000 will have to be paid.

Cost of Meters

Net Meter shall be procured and installed by the Distribution Company at its cost. However, the consumer can also opt to procure the meter.

Time of Day Tariff

The surplus electricity fed during peak hour tariffs is not going to be compensated against peak hours. It will be adjusted against non-peak hours.

Carry over

In case the electricity produced by solar plant in any billing cycle is more than the total energy consumed, then the excess of solar energy exported to the grid will be ‘carried over’ to the next billing cycle. However, at the end of every year, the total net exported electricity from solar is going to be compensated at the Average Pooled in Power Cost of the Distribution Company (approximately Rs. 3.4 for Maharashtra) and the credit carried over would be reset to ZERO.


Documents with Application

The following documents need to be submitted along with Application for Net Metering:

  • Copy of the latest paid electricity bill
  • General Power of Attorney in favor of signatory in case of Partnership Firms, certified true copy of the Resolution, authorizing the signatory to deal with the concerned Distribution Company, passed by the Board of Directors in case of Companies (as applicable)
  • Technical Details of PV Modules, Inverter and other equipment of system proposed to be installed
  • Proof of Payment of Registration Fees


The short report on financial viability analysis report is aimed to provide a glimpse on financial viability in terms of certain expected return on equity,

Grid parity analysis


Cost of Solar Rooftop Project assuming INR 55/Wp
Expected Equity IRR: 12%   Expected Equity IRR: 15% Expected Equity IRR: 18%
LCOE (INR/kWh): 5.89 LCOE (INR/kWh): 6.38   LCOE (INR/kWh): 6.83


1kW solar system in Valsad

Smiling Sun : 1kW Solar Rooftop System in Valsad

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A professor in Valsad District of Gujarat installs 1kW Solar System on roof of his house

Dr. Uttam Patel is a professor in Vanraj Arts and commerce college. He wanted to source energy solar energy for his day to day requirement of electricity. So he posted his requirement on SolarConnect for a 1kW system on his house in Valsad, Gujarat.

Ezysolare team worked on the information provided by Dr. Patel and prepared Solar Energy Assessment Report and Plant Layout Designs for his Solar System.

Soon after this Dr. Patel got a call from Mr. Hiren Kabaria from Samvit Energy. Samvit Energy is a verified Solar System installation company registered on SolarConnect.

The duo discussed the requirement, negotiated on terms and conditions, and decided to work together to set up the 1kW Off-Grid Solar System on Dr. Patel’s house.

Technical Specification

Off Grid Solar System [ Off Grid Solar System is a system with battery backup ]

Modules : 250Wp Borg Energy

Inverter : 3kVA/24V solar hybrid inverter – Flin Energy

Battery : Exide 105Ah C10 [ Backup – 4 to 6 hours ]


The system generates 4.50 units on daily basis saving electricity bill of about Rs. 1050 per month, which is a significant amount for a residential home. It took just 15 days for complete procurement and installation of the system.

“ I am Amazed by the technology and working of solar .Wanted to save on electricity and promote green energy. Would encourage more and more people to use solar.It is a one-time installation cost and gives you savings for years to come. Our full daytime load is running and supported by the solar system installed. “ said Dr. Patel

Feedback From Dr. Uttam Patel :

“Mr. Hiren Kabaria is very humble and friendly. He promptly responded to all our queries and gave us a customized solution that meets our requirement. Fantastic support from samvit energy and ezysolare team. I am happy and satisfied with the efforts made and the quality of the solar system installed.”

1kW solar system in Valsad
1kW solar system in Valsad

Feedback from Samvit Energy :

“As a solar rooftop installer, it was a boon to get registered on the ezysolare portal. Ezysolare has made our lives easier to find roof owners and also leading manufacturers and suppliers of  solar components at the best market rate.

We found Dr. Uttam’s solar requirement on ezysolare along with the site layout and complete installation details. All the details and drawings were clearly mentioned and accurate and as a result installation at client’s site was much easier and as per the requirement of the client. After installation, Dr. Uttam was thankful to us and ezysolare.”



Thank You,

Team SolarConnect, Ezysolare


Solar Rooftop PV Plant Target for The Financial Year 2016-17

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The Ministry Of New and Renewable Energy ( MNRE ) is implementing a Grid connected Rooftop and Solar Power Plant Programme. The Government has set a target of 40,000 MWp of grid interactive rooftop solar (RTS) PV plants by 2022. These RTS plants will be set up in residential, commercial, industrial, institutional, Government or PSU sectors ranging from 1kWp to 500kWp capacity.


Trend Analysis on Solar PV Module Prices

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Figure 1-Solar PV Installation Capacity

With rising solar photovoltaic based power development across the globe, there is more competition in the PV industry as manufacturing segment and downfall of various cost component that results in better deployment for solar manufacturing and price cut. Module Pricing Note describes the change in the pricing trends of the solar photovoltaic modules in various region i.e. Germany, East Asia, South east Asia, North East Asia as these market are highly demand oriented. In this analysis note solar PV module cost (INR/Wp) has been covered as Indian Solar Industry is moving with CAGR of 95.60% YoY since 2010 and expected to grow at the rate of 61.67%  YoY in next 6 year. Presently, In solar industry, the most important thing which decides Cost-Benefit ratio of the project is the price of Modules. Instead there are so many other factors also, but the present focus is on modules since the cost of solar cells fluctuates at very higher rate as per the market or demand. The change in $ (share prices) value also effects the INR values and 85-88% of the installation are based on the imports from the off shore companies.


Techno Commercial Analysis of DC Overloading in Solar Photovoltaic Power Projects

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The concept of overloading is not new. And it has its own pros & cons

Lets walk through the Techno commercial analysis of DC Overloading in Solar Photovoltaic Power Projects

The Inverter has been overloaded on DC side due to the following list of benefits:

  • Inverters are power converting devices which merely convert the energy received by them, hence in order to maximize the generation in a solar power plant, the DC side is generally overloaded to a certain limit. The input energy received by the inverter is dependent on the solar irradiation which varies throughout the day. The morning and evening period generally witness low levels of irradiation. Connecting higher DC  to inverters helps transmit higher energy to inverter, hence increasing the inverter output during these low irradiation conditions leading to significant gain in energy overall.

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Getting MNRE Exemption on Rooftop Solar Projects

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As was discussed in the ezysolare webinar last week, one of the key benefits available to Solar Power Projects is Exemption from paying Excise Duty and Customs Duty on Equipment used in setting up a solar power plant.  Till recently, this was a privilege available only to large Utility Scale power plants. However, according to the Office Memorandum issued on 28th November, 2014, the benefit of Excise Exemption is available to rooftop and off grid solar projects as well. This helps in saving the Excise Duty of 12.5% on most Solar Equipment, thus, reducing the cost of installation.

Office Memorandum on MNRE Exemption for Rooftop Projects


Dialogue on Maharashtra Net Metering Policy 2015

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Maharashtra released its Net Metering Policy on 10th September, 2015 and soon, ezysolare followed that up with a workshop in Pune last week to discuss the nuances. So, read on to understand the Policy, Technical, Financial and Policy aspects of the policy here.

Download The Policy

The Background

National Action Plan on Climate Change in 2009 introduced Renewable Purchase Obligation (RPO) according to which 0.25% of India’s power consumption should be consumed from Solar Power – an increase of approximately 3,000 MW every year. Soon, the then Manmohan Singh Govt  launched National Solar Mission with the objective to setup 20 GW of solar by 2022 and the current.


How to Calculate Solar Energy Generation

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Sometime back, we had written a little nursery rhyme on the step by step process of generation of solar power. In brief, it goes as follows:

  1. Radiation falls on Solar Panels
  2. Panels convert this radiation into DC Current
  3. DC Current passes through Copper Cables to reach Inverters
  4. Inverters convert DC current into AC Current
  5. AC Power is fed to the building electrical load.

These also broadly happen to be the steps to calculate energy generation, as was covered in the last ezysolare webinar that you can access here.