As the world increasingly turns to renewable energy, on-grid solar rooftop systems are becoming a popular choice for homeowners and businesses. But what exactly is an on-grid system, and how does it work? In this guide, we’ll explore everything you need to know about on-grid solar systems, their components, costs, and when they might be the right choice for you.
What is an On Grid Solar Rooftop System?
An on-grid solar rooftop system, also known as a grid-tied or grid-connected system, is a solar power setup that is directly connected to the public electricity grid. Unlike off-grid systems, which rely on battery storage, on-grid systems do not have batteries. Instead, they use the grid as a virtual battery, allowing excess energy produced by the solar panels to be fed back into the grid. This surplus energy can then be credited to the homeowner’s account, offsetting electricity costs through a process known as net metering.
On-grid systems are the most common type of solar setup because they are typically more affordable, easier to install, and offer a quicker return on investment.
Components of a Grid Tied Solar Rooftop System
An on-grid solar rooftop system comprises several key components that work together to generate and manage electricity:
- Solar Panels: The primary component that captures sunlight and converts it into direct current (DC) electricity. The number and type of panels depend on your energy needs and available roof space.
- Inverter: The inverter converts the DC electricity produced by the solar panels into alternating current (AC) electricity, which is used to power your home or business. String inverters or microinverters are commonly used in on-grid systems.
- Net Meter: A crucial component of on-grid systems, the net meter records the amount of electricity fed into and drawn from the grid. It helps in calculating the net electricity consumption and determining any credits or charges on your electricity bill.
- Mounting Structures: These are the physical frameworks that hold the solar panels in place on your rooftop. They are designed to withstand environmental factors like wind and rain.
- Cabling and Wiring: The system includes all necessary wiring to connect the solar panels, inverter, and net meter.
Cost of an On Grid Solar Rooftop System
The cost of an on-grid solar rooftop system can vary widely depending on several factors, including the system size, quality of components, and installation costs. In India, a typical residential on-grid system (3kW to 5kW) can range from INR 1.5 lakh to INR 4 lakh (USD 1,800 to USD 4,800). Here’s a general cost breakdown:
- Solar Panels: INR 1 lakh to INR 2.5 lakh (USD 1,200 to USD 3,000)
- Inverter: INR 50,000 to INR 1 lakh (USD 600 to USD 1,200)
- Net Meter: INR 10,000 to INR 30,000 (USD 120 to USD 360)
- Installation and Miscellaneous Costs: INR 20,000 to INR 50,000 (USD 240 to USD 600)
Government subsidies, tax benefits, and incentives can significantly reduce these costs, making on-grid systems more accessible.
When to Choose an Grid Tied Solar System
Choosing an on-grid solar system depends on your specific energy needs, location, and financial goals. Here are some scenarios where an on-grid system might be the best choice:
- Access to a Reliable Grid: If you live in an area with a stable and reliable electricity grid, an on-grid system allows you to reduce your electricity bills by generating your own power while still having the grid as a backup.
- Cost-Effective Solution: On-grid systems are generally more affordable than off-grid systems because they do not require batteries. This makes them a cost-effective option for those looking to reduce their electricity costs.
- Maximizing Returns with Net Metering: If your region offers net metering, an on-grid system allows you to earn credits for any excess electricity your system produces. This can significantly shorten the payback period of your solar investment.
- Urban and Suburban Areas: On-grid systems are ideal for urban and suburban areas where grid access is reliable, and space for large battery banks is limited.
Commonly Asked Questions
1. What Happens During a Power Outage?
During a power outage, an on-grid solar system will not function unless it is equipped with a hybrid inverter and battery backup. This is a safety feature to protect utility workers who might be repairing the grid.
2. How Much Can I Save with an On-Grid Solar System?
The savings depend on several factors, including your location, the size of your solar system, and local electricity rates. On average, homeowners can expect to save 50% to 90% on their electricity bills.
3. Is Net Metering Available Everywhere?
Net metering policies vary by country and region. It’s essential to check with your local utility provider to see if net metering is available and understand the specific terms and conditions.
4. Can I Expand My On-Grid Solar System Later?
Yes, on-grid systems are scalable. You can add more panels to your existing setup if your energy needs increase, provided your inverter and roof space can accommodate the expansion.
5. How Long Does It Take to Install an On-Grid Solar System?
The installation time for an on-grid solar system typically ranges from one to three days, depending on the system size and complexity. The process may take longer if permits and inspections are required.
An on-grid solar rooftop system offers a practical and cost-effective way to harness the power of the sun, reduce electricity bills, and contribute to a greener planet. By understanding the components, costs, and appropriate use cases, you can make an informed decision about whether an on-grid solar system is the right choice for you.
ZunRoof is one of the leading residential solar rooftop companies in India. Get in touch with us for a hassle solar rooftop installation experience. Stay tuned to our blog for more informative content.