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Today, fossil fuels and their by-products are being scrutinized by the world, and the focus is more on greener and environmentally friendly sources of energy. Solar Energy, mainly the use of Solar panels, has gained much traction in this field, It uses Solar Photovoltaic (PV) Cells to capture sunlight and convert that to electricity.

However one must remember that solar panels usually provide Direct Current (DC) energy. Most of our household electrical appliances use Alternating Current (AC) energy. Thus, we need to convert DC to AC, and this is where we use a solar inverter. This device converts the output current from the solar panels to AC energy, which can be used in your house.

There are many advantages to using a solar inverter:

• It reduces Greenhouse impacts since solar energy is being used.
• It is very financially practical and reduces electricity bills to a great extent.
• They are easier to set up and operate as compared to traditional generators and inverters.
• Ease of maintenance and repairing
• A reliable source of conversion from DC to AC
• Helps reduce the energy needs of households and businesses to a great extent
• Many gadgets can make effective use of the inverter's current, for example – solar cookers, solar heaters, etc.
• It also allows for better control for homeowners and businesses in monitoring their energy usage.
• Usually, these systems have a long life (up to 25 years)

Also Read: Aspects To Consider While Purchasing A Solar Inverter

Today, there are three types of Solar Inverter technologies that one can choose from:

String Inverters (a centralized inverters)

In a PV system with a string inverter, the panels are wired together with 'strings,' Each panel's output can be sent back to the central inverter via this 'string.' This allows for a low-cost inverter operation and is durable and easy to maintain. These are best suited for houses with simple roofs that get sun throughout the day and for people looking for an economical and low-cost PV system.

Microinverters (individual panel inverters)

These are different from the string inverter system, and here, the solar panels each have a small inverter installed. Therefore, the conversion from DC to AC occurs right on the roof. The advantage of this system is that for systems that experience shading or have more complex designs, one can use this instead of a string system to mitigate the problems. Furthermore, it allows for panel-level monitoring since each microinverter is connected to the solar panels. These are usually high-cost, high-performance inverters, and hence one must use them for complicated roof constructions.

Power Optimizers

These fall in between microinverters and string inverters. These are interfaces located near (or on) the solar panels, which 'condition' the DC output and send it back to a centralized inverter. The advantage is that it helps monitor individual panels, mitigate the impact of shading, optimize the efficiency of inverters, and cost less than microinverters. These are best suited for houses or buildings with less ideal solar panel locations and whose owners are willing to pay a little extra for a better system but don't want microinverters.

Nantech Power Systems Pvt. Ltd provides the best inverters to buy in India, with its excellent product line-up, efficient services, and timely after-sales support. Check it out!

Installing a solar power system has become a fascination, a luxury and a necessity. Why waste the energy of the sun when you have it in abundance? When it comes to investing in solar power systems, the first and foremost thing is to understand everything about the solar power system- how it works, its components, its types, the various systems, etc.

This knowledge is crucial in making a choice between the Off-Grid and On-Grid solar power systems, which is quite often the big dilemma. So, what is the solar power system and how does it work?

Generated by the sun, solar power is sustainable, clean and usable energy. Irrespective of where they are used, all solar systems work on the same basic principles. The solar panel is the primary component of the solar power system. The solar panels convert direct sunlight into Direct Current using the Photovoltaic effect. The DC power is either stored in a battery or converted into AC power and used to run appliances. This is just the entire process in a nutshell!

Components of a solar power system that harness the power of the sun!

There are four main components of the system that are common to all the types of solar panels available today:

• The solar panels

Modern solar panels are made of PV cells or Photovoltaic cells, which are crucial to initiate the process of electricity generation. Solar panels or solar modules are connected in strings to form a “Solar Array”. To maximize the use of your solar panels, consider its orientation, tilt angles, and efficiency. Solar panels require uninhibited sunlight to fall directly on the panel. Panels require daily maintenance, and proper installation to work without a hitch.

• The solar inverter

The solar inverter plays a critical role in converting the Direct Current to grid-compatible Alternating Current which is what you use in your homes and commercial establishments. From a reliability perspective, the inverters are vulnerable, because they are the weak link in this system. Hence is it vital to choose a good quality inverter.

• The batteries

There are two kinds of batteries used for solar energy storage:

• Lead Acid batteries
• Lithium-ion batteries.
• Lithium-ion batteries are rechargeable and available in a number of shapes and sizes that can be configured in any way. While there are other options like AGM, Gel, redox-flow batteries and sodium-ion batteries, lithium-ion seems to be the top favourite.

• The electric switchboard

The electric switchboard is a handy component that collects the AC energy from the inverter and disperses it through various circuits to power your home appliances. Any excess electricity is sent back to the grid through an energy meter or stored in a battery for later use. This is commonly known as Net Metering.

But that’s not all! Apart from the above-mentioned components, there are so many more basic parts that combine to make the entire solar power system. They are:

• Racking and mounting components
• Junction boxes
• Circuit breakers
• Load centres
• Surge devices
• Wiring
• Charge controllers

Also Read: Are We An Electricity-Surplus Nation?

Off-grid VS On-grid: What’s the real deal?

Ever since its invention, the solar power system has evolved into three types:

• The On-Grid or the grid-feed solar system
• The Off-Grid or SAPS (Stand Alone Power System)
• The Hybrid or grid-connected solar system with battery storage

To arrive at a proper conclusion to the dilemma of choosing between the three types, you actually have to gain a clear understanding of what they actually mean.

The On-Grid System

When your solar power system is connected to the common utility power grid, it is an On-Grid system. Most solar power systems in India are on-grid systems, mainly because they are easy to install and very economical. Solar systems that power residences are often connected to the common utility grid. Any excess electricity that your on-grid system produces can be sent to the grid, allowing you to build enough credit that you can cash out at the end of the year or month. This is an effective process called Net Metering which is very conducive for solar power owners who are looking to generate ROI.

The Off-Grid System

An Off-Grid system empowers you to be 100% self-sustained because yours is a stand-alone system that is not connected to any grid. This system allows you to store excess electricity that will come in handy at critical times. However, there is a downside to the off-grid system. It calls for heavy investment because of the complex installation that uses expensive, bulky batteries. The expenses itself can be a hurdle to gaining the actual amount of electricity you require.

The Hybrid System

The hybrid system is a clever combination of the off-grid and on-grid systems that offer an easy “plug and play” solution. With the use of special hybrid inverters, the excess energy is stored for later use. The hybrid system is quite similar to your UPS system since it serves the same purpose of providing stored energy in case of a blackout.

The Yin And Yang Of Off-Grid And On-Grid Systems

Take a look at just a few of the stark differences of the off-grid and on-grid solar systems:

Power Supply

You are completely safe with the on-grid system because you can be assured of a consistent power supply. But the off-grid system is not so promising. With limited battery backup, the off-grid system relies entirely on the power of the sun to generate electricity. You wouldn’t want to encounter such a dilemma on a rainy day, would you?

Excess Electricity Storage

The on-grid system not only allows you to draw stored energy from the grid when you need it but also generates an income with Net Metering where you are credited for the amount of electricity your system generates. With off-grid systems, you do not have the advantage of net metering and you need to invest in plenty of batteries to store the excess energy.

Outage Power Supply

Power supply during an outage
This is where the off-grid system has the upper hand because it is completely independent. The on-grid system will work during a power outage only if it has a battery backup.

Your Electricity Bill

Yes, there will be a few changes in your electricity bill even if you own an On-grid system. The off-grid system is not tied to a grid, so there are no bills. However, the cost of installation can go through the roof because of the equipment.

What’s the verdict?

In India, the implementation of Net Metering and open access has boosted the adoption of On-grid solar power systems. However, the Off-grid system is a better choice for usage in remote areas where the utility grid is unavailable or inaccessible.

Nantech Power Systems Pvt Ltd, the leading inverter dealers in Chennai, give you expert guidance in choosing the right solar power system for your home or commercial building. Our reliable solar power systems are exceptional in quality and backed by warranty. Waste no time! Call us today @ +91 99623 98222 to harness the power of the sun!