First net metering project in West Bengal: BRWS Hospital, Patuli

Location: Patuli
Department: Hospital

Overview – Net-Metered Solar Rooftop Power Plant

The BRWS hospital in Patuli is said to be the first project in West Bengal that implemented the net metering policy. Net Metering is essentially a system that gives solar energy owners “credits” for the power that they add to the grid. When the solar panels produce excess power, that power is sent to the grid. And this power can be ‘taken back’ when the solar plants are not functioning – for example, during the night. When a unit of solar energy that has been ‘net metered’ is called back for use, the bi-directional electricity meter will run backward. That is, customers are billed only for the ‘net’ energy use.

Every state electricity board has its terms and conditions while implementing ‘net metering.’ In West Bengal, the minimum requirement of plant size is 5kWh with 3 phase power to implement net Metering. All institutional consumers like govt. Private or charitable hospitals and health centers, government offices and institutions, government, government-aided or private academic institutions, or any housing complex under govt. Schemes for development are eligible for this policy, barring any domestic users.

For the standard structural design in this project, only 3.5 kWh was possible due to the small roof space available. For this reason, all the other PV system integrators rejected the work for the space issue. SunShell came up with a splendid solution to make the project eligible to meet the requirements for Net Metering. They decided on a uniquely elevated structural design to accommodate the whole 5kWh Net-Metered Solar Rooftop Power Plant on the same roof. Thus the 1st net-metered grid-connected solar rooftop power plant was finally commissioned in West Bengal

 

Technical Details

The 5kWh plant is grid-connected with the first-ever net metering policy. The 20 units of 250Wp solar PV modules produce enough energy to run the whole hospital. The inverter used in this model is of a Kaco variety of 5kWh with a DC switch present. While working in commercial sectors, it is crucial to pay attention to protective measures. For this reason, SunShell has also introduced AJB with SPD of Type II 1000V 40kA on PV string fuse 1000V 15kA. To protect against high voltage and load failures, the structure has ACDB with LED indication on AC side SPD and suitable MCB. Also, a termination system of 415V is present on the LT side. For additional safety, lightning arrestors with dedicated earthing and required earthing protection in compliance with IS 3043 guidelines are also fitted into the structure for optimal operation.

 

Technical Features

  • Plant type: Grid-connected
  • Net metering: Yes
  • Solar PV Module: 250Wp x 20 nos
  • Inverter: Kaco 5kWp with DC switch
  • AJB: yes, with SPD Type II 1000V 40kA, PV string fuse 1000V 15A
  • ACDB: yes with AC side SPD, Indication LED, and Suitable size MCB
  • Termination: At LT side 415V
  • Lightning arrestor: Yes, with dedicated earthing
  • Earthing protection: yes, complied with IS 3043
You might also like
27th May, 2021
North Bengal University – 225kWp On-Grid Solar Rooftop Power Plant
In the present time, the world is adapting renewable solar energy at a rapid rate. India is also emerging in this global arena as the second-largest country in terms of solar energy generation globally. In its efforts to move further towards sustainable energy, the Indian Government has set a target to achieve 175 GW of installed capacity of renewable solar power by the end of the year 2022.
View More...
21st Dec, 2020
7.5 HP Solar Water Pumping System With Dual Axis Tracker & Sprinkler
SunShell powers integrated the 7.5 HP solar water pumping system in the Chitmahal area in the Coochbihar district. This system aims to lift water from the nearby river and distribute it to the 8 hectares of land through sprinklers. This project was a first of its kind and was closely monitored by the Chief Minister’s office. The whole structure used 24 numbers of 72 Cells 325Wp Poly-Crystalline Solar Panels with a dual-axis tracker, operated manually by a single person. The dual-axis tracker helps track the sun’s changing positions due to the earth’s rotation and revolution movements and, in turn, helps capture the maximum amount of sun’s energy to be used for the system. One axis is azimuth, which allows the solar panel to move left and right. The other axis is elevation and allows the panel to turn up and down.
View More...
13th Dec, 2020
6.6 KWp On-Grid Domestic Rooftop Solar PV Power Plant: First Domestic project under CESC
Dr. Rajen Kumar Pandey, a renowned doctor and renewable energy enthusiast were the first to introduce a domestic net metering system for his residential solar rooftop power plant under CESC. Net metering is a billing mechanism that credits solar energy system owners for the electricity they add to the grid. If a home is net-metered, the electricity meter will run backward to provide a credit against what electricity is consumed at night or other periods when the home's electricity use exceeds the system's output.
View More...
20th Nov, 2020
Rajpur Sonarpur Municipality: Grid Connect Solar PV Rooftop Power Plant
SunShell power facilitated the 10 kWp solar rooftop power plant in BRWS hospital, notably the first solar plant under this municipality in West Bengal to get SPV (solar photovoltaic ) plant with net metering. The historical event witnessed the arrival of Hon. Minister of Power, WB, Sri Manish Gupta, who inaugurated the project. The project was executed with the utmost care and attention, which brought about huge media attention. It was published in leading newspapers like Ananda Bazar Patrika and was simultaneously telecasted by Kolkata TV in West Bengal.
View More...