What is difference between on-grid and off-grid solar system

What
is difference between on-grid and off-grid solar system

Before
we get into depth about “what is difference between on-grid and off-grid solar
system”, we must first understand how does Solar panels work?

Solar
Panels, solar modules or solar photovoltaic PV modules actually work by
absorbing sunlight with photovoltaic cells, generating direct current (DC) electricity
and then converting it to usable alternating current (AC) electricity with the
help of smart solar inverter technology. AC energy or electricity then flows
through the home's electrical panel via Array Junction Box (AJB) and
Distribution Junction Box (DJB) for further distribution to the load accordingly.

Solar
energy or solar power is perhaps the cleanest, most reliable form of renewable
energy available to the mankind, and it can be used in several forms to help
power your home or business. Solar-powered photovoltaic (PV) panels convert the
sunlight into electricity by stimulating electrons in silicon cells using the
photons of light from the sun.

Now
it is easier to understand “What is the difference between On-grid and off-grid
solar power?” On-grid solar power means your solar power plant or solar panels system
is tied to your local utility company's system which is called as “grid” or
“mains electricity”. Each and every state in India has its own Electricity
Distribution Corporations / Companies like state of Haryana has Uttar Haryana
Bijli Vitaran Nigam (UHBVN) and Dakshin Haryana Bijli Vitaran Nigam (DHBVN).
Most of the residence / Institutional / NGOs / NPOs / Industries use Grid
Connected Rooftop Solar Power Plant System so that their load runs on solar
throughout day time while extra units / electricity produced by the system is
fed in the grid through Bi-Directional Net Meter.  Extra Units or electricity fed in the day
time can be utilized by the user during night through Bi-Directional Net Meter.
This system is helpful to curtail your electricity bills up to 90% for almost
25 years.  Let us understand this by a
simple example of 5 kWp Grid Connected solar power plant installed at a User’s
rooftop is expected to produce 4-5 units per kilowatt per day.  Thus a 5 kWp solar plant will produce at
least 20 units per day. So in this example, user’s consumption may be 10 units
during day time and similar amount of units at night. So, after providing 10
units to the user’s load, remaining 10 units are fed in the Grid during day
time and same is received back during night time.  At the end, we can summarise that user had
produced his own 20 units by the solar system and utilized his whole 20 units
(10 during and 10 at night) by the help of On-Grid Inverter and Bidirectional
Net Meter. We may note here, that On-Grid system requires availability of Mains
electricity to enable feeding in excess units in the Grid.  In case of Grid failure, On-Grid solar power
plant would also stop working due to International Safety and Security measures
for Grid workforce. So we can say, on-grid solar power plant is installed in
such areas where grid availability is almost 24 hours to enable excess
generation to be fed in the grid.

Now
we can define that On-Grid Systems are solar pv systems that only generate
power when the utility power grid is available. They must connect to the grid
to function. They can send excess power generated back to the grid when you are
overproducing so you credit it for later use. On-Grid solar system can be
installed in most of the Metropolitan Cities, Urban and Sub-Urban cities of
India where grid availability is almost 24 hours.

Grid
tied Solar PV systems consist of solar panels, Solar String inverter. These
systems do not utilize batteries since Grid is used as storage of excess
electricity produced by the system. The solar panels generate electricity from
sunlight and feed it to the solar string inverter which converts the DC voltage
coming from the solar panels directly into AC power to match the grid.

When
daylight sunrays fall on solar panels they produce Direct Current (DC)
electricity which is converted into 240 V AC power by solar string inverters to
power up your load, excess power, if any is fed in the grid by help of two-way
energy meter (bidirectional net meter).  Some
electricity companies will meter the electricity fed into the grid by your solar
power plant system and provide a credit on your bill in the form of Solar
Generation Incentives.  Accumulated
credited units can be consumed by the user within one financial year to avoid
lapse.

A
grid-connected photovoltaic power system or grid-connected PV power system is
electricity generating solar PV power system that is connected to the utility
grid. A grid-connected PV system consists of solar panels, String Solar inverters,
and grid Bidirectional Net Meters for connection with the Grid or main
electricity.

On
the other hand, off- grid solar power plant system is a system designed to help
people’s own electrical system function without the support of remote
infrastructure, such as an electrical grid. In electricity, off-grid solar
power plant system can work as stand-alone power system or mini-grid typically
to provide a electricity to users or smaller community who either do not have
access or have very limited access to the main grid with electricity like most
of the rural areas in India.

Off-grid
solar power plant systems can refer to living in a self-sufficient manner
without relying upon local electricity distribution companies DISCOM
Utility.  Off-grid rooftop solar power
plants are autonomous; they do not rely on electrical power grid, or similar
utility services.

On-grid
inverters collect DC power from solar panels, convert it into AC, and send it
into the load as well as into grid for credit / later use. On-Grid solar power
plants are simple and easier to install since there are only two main
components i.e. string inverter and solar panels.  On the other hand an off-grid inverter needs
a battery bank to function.

Off-Grid
solar power plant is sufficient to power your house with a solar energy system.
House hold appliances and lights that use AC (alternating current) electricity
will require an inverter to do the job conversion from DC to AC. 

Contact DayRise Solar team every time you need to know the way to get good offers while you buy solar panels in Sonipat. Also to get help and full Procedure to Avail Solar Subsidy in India for Grid Connected Rooftop Solar Power Plant, it's possible you'll like to contact extremely skilled and expert group of DayRise Solar by way of its Website's product Page or by e mail alternately for any question associated to Solar Energy, Solar Subsidy, Solar power, solar products, design, installation and commissioning of On-Grid / Off-Grid Rooftop / Ground Mounted Solar Power Plants throughout Haryana and Delhi NCR. Qualified skilled team of DayRise Solar might help you in processing of subsidy utility, bi-directional meter utility and uploading of all related documents.



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