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On Grid Battery System

On-grid refers to a type of solar system that is tied to the local grid. It is highly recommended for domestic use as household energy needs change, usually per diem. The system is designed to manage electricity when energy output exceeds or falls below your requirement.

In this system, the grid acts as your battery bank. When the panels get less sunshine and fail to give standard energy output, you can switch to grid electricity instead of buying a battery. In addition, the on-grid system will automatically transfer excess and unused solar electricity to the grid, allowing you to build credit. These solar credits then can be used to purchase grid electricity, or you can cash them out by the end of the year. This arrangement works under the net metering system.


How Does an On-Grid Solar System for Home Work?

Like other types of solar plants, the panel generates electricity in an on-grid solar system. However, since the system is connected to the local grid, the net metering system plays an important role in your monthly electricity cost.

An on-grid solar power system provides your home with the electricity required during sunshine hours. As it is connected to the grid, you can draw power from the battery storage when electricity generation is low — primarily during the night and on cold and cloudy days. The arrangement of solar panels on the roof captures maximum sunlight and converts it into solar power. This energy generated in DC form runs through the inverter to transform into alternating current (AC). This solar electricity is suitable for running your home appliances and all electronic devices.

When the solar energy generated is more than the requirements of your house, the unused power is fed to the national grid. Similarly, you can draw power from the grid when there is insufficient energy production. The meter box records the import and export of power and eventually tells you the net amount to be paid/received through monthly utility bills.


Components of a Grid-Connected Solar System

The main workhorses in an on-grid solar system for home are the roof-mounted solar panels that convert sunshine into solar energy and the bi-directional inverters that turn DC energy into AC electricity for domestic use. 

The key components that a working on-grid solar system requires are:

PV modules/panels

Solar panels are the key working component of a solar plant. Each solar panel comprises photovoltaic cells (PV cells) placed between semiconducting materials (like silicon). A current field is generated when photons in the sunlight fall on this material – a process called the photoelectric effect. This results in the generation of direct current or DC electricity.

Bi-directional inverter

The direct current of electricity passes through the inverter and comes out as alternating current (AC). Bi-directional inverters also work to stabilize the output voltage. If you choose to buy a battery bank, this type of inverter will facilitate AC to DC conversion for battery charging.

AC breaker panel with fuses

This type of panel provides a single platform for not only the domestic supply of electricity but also for inverter and filter connections.

Charge controller

It prevents overcharging of the battery and helps prolong the lifespan of your PV system.

Electric meters

The purpose of electric meters is to bill and quantify the energy generated and used. Two meters are required in the working of a PV generator.

Safety switches and cabling

Safety switches (isolation switching and control) are required to disconnect both the AC side and DC side of the bi-directional inverter during testing and maintenance. Also, cabling is used to connect the different solar components together.

Electricity grid

On-grid solar systems are connected to the utility grid for the two-way flow of electricity between the grid and your solar plant under net metering.


Benefits of an On-Grid Solar System

There are plenty of advantages of an on-grid solar system for homeowners beyond the fact that it costs less than other types of solar systems since fewer components are needed. Also, the financial benefits of solar for homes outweigh the cost of PV systems over time, not to mention the incredible environmental benefits solar offers.

Constant supply of power

A grid-connected solar system guarantees that your home always gets power, even when your solar system is undergoing repair or generates insufficient power on rainy and cloudy days. You can also opt for a battery bank when personalizing your system to store some surplus energy to be used when the grid is down. As a result, you are not entirely dependent on the sun and can draw any additional energy, when needed, from the grid.

Energy Cost Savings

With solar powering your home, your monthly energy bill plummets, giving you the joy of small savings. These small portions add up to show significant savings. Additionally, solar investment also promises high returns. Every month you use solar electricity and don’t purchase any grid electricity, your bill will reflect a nominal charge. On days when your panels generate excess electricity, you can export it to the government grid for credit units, which will also reflect in your monthly utility bills. When your electricity exports exceed your imports, you will be paid at tariff rates fixed by the government. Your solar system not only reduces your electricity cost but also becomes a source of your income. These savings accumulate into a large amount over the years, just as enough even offset your initial solar cost in just 6-8 years.

Generate your own electricity.

When you live in a solar-equipped home, you are nearly grid-independent and can generate the amount of electricity you need to function every day. Your solar company ensures that you get the right capacity of an on-grid solar system based on your electricity needs so that the days when you get to switch to the government grid are as few as possible. Moreover, today’s photovoltaic solar panels are more energy-efficient and give higher energy output against the amount of sunshine captured by each solar cell. As a result, less area and few panels are needed to meet your electricity requirements.

Environmentally friendly

The environmental benefits of solar are a major reason why you should get rooftop solar and why the government is offering subsidies to make on-grid solar power systems more affordable for homes. By adopting solar, you reduce greenhouse gas emissions, lower the demand for fossil fuels, and eventually decrease your own carbon footprint.


USL On Grid Rooftop System :-

System Model  RTS-2KW  RTS-2.2KW  RTS-3KW  RTS-3.3KW  RTS-4KW
SPV Modules  335W Poly x 6Nos. or

555W Mono PERC x 3Nos

 555W Mono PERC  4Nos  335W Poly x 9Nos  555W Mono PERC 6Nos  555W Mono PERC 7Nos
Grid Inverter 2KW x 1Nos. 2.2KW x 1Nos. 3.0KW x 1Nos. 3.3KW x 1Nos. 4KW x 1Nos.
PV Mount Kit  Al / GI x 1Set.  Al / GI x 1Set.  Al / GI x 1Set.  Al / GI x 1Set.  Al / GI x 1Set.
DB Box  1Set  1Set  1Set  1Set  1Set
Typ. Generation per Day*  >8kWh  >9kWh  >12kWh  >14kWh  >16kWh
Area required for PV Modules  130sq.feet / 100sq.feet  140sq.feet  200sq.feet  200sq.feet  240sq.feet

*Based on certain conditions


System Model  RTS-5KW  RTS-6.1KW  RTS-8KW  RTS-9KW  RTS-10KW
SPV Modules  555W Mono PERC x 9Nos  555W Mono PERC  11Nos 555W Mono PERC  14Nos  555W Mono PERC 16Nos  555W Mono PERC 18Nos
Grid Inverter 5KW x 1Nos. 6.2KW 3phase x 1Nos. 8KW 3phase x 1Nos. 10KW 3phase x 1Nos. 10KW 3Phase x 1Nos.
PV Mount Kit  Al / GI x 1Set.  Al / GI x 1Set.  Al / GI x 1Set.  Al / GI x 1Set.  Al / GI x 1Set.
DB Box  1Set  1Set  1Set  1Set  1Set
Typ. Generation per Day*  >20kWh  >24kWh  >31kWh  >36kWh  >40kWh
Area required for PV Modules  300sq.feet  370sq.feet  470sq.feet  540sq.feet  600sq.feet

*Based on certain conditions


System Model  RTS-20KW  RTS-25KW  RTS-50KW  RTS-90KW  RTS-100KW
SPV Modules 555W Mono PERC  36Nos 555W Mono PERC  45Nos  555W Mono PERC  90Nos  555W Mono PERC 162Nos  555W Mono PERC 178Nos
Grid Inverter 3Phase 20KW x 1Nos. 25KW x 1Nos. 50KW x 1Nos. 45KW x 2Nos 100KW x 1Nos.
PV Mount Kit  Al / GI x 1Set.  Al / GI x 1Set.  Al / GI x 1Set.  Al / GI x 1Set.  Al / GI x 1Set.
DB Box  1Set  1Set  1Set  1Set  1Set
Typ. Generation per Day*  >80kWh  >100kWh  >200kWh  >360kWh  >450kWh
Area required for PV Modules  1200sq.feet  1600sq.feet  3300sq.feet  6000sq.feet  6400sq.feet

*Based on certain conditions



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