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With the increasing costs of power and electricity, a number of businesses are shifting to solar power systems. The Ministry of New and Renewable Energy (MNRE), Government of India is also encouraging solar PV systems for businesses under its Jawaharlal Nehru National Solar Mission. India is ranked second among emerging economies to lead towards a transition to clean energy, according to a 2018 report by Climatescope. Commercial and industrial buildings in India, which are supplied grid electricity at significantly higher rates than residential users, find switching to solar systems more economical. While making a decision to shift to solar power systems a number of businesses get confused between off-grid and on-grid solar systems. To make the right choice it is important to comprehend the key differences between off-grid and on-grid solar systems.
On-grid solar power systems generate power using a solar power system and are directly connected to the utility power grid. These systems send excess power generated by the solar power system to the utility grid and consumers get compensated for the extra power fed back. These systems work in collaboration with the power grid. In the case when there is not enough sunlight to meet your business’ needs, the system runs on the power supplied by the grid. These systems are best suitable when your power consumption is high and you wish to reduce your electricity bills. On-grid systems can be installed with or without net metering. Being connected to the main grid, these systems do not work during power outages.
Businesses can rely on on-grid solar systems to meet their daily requirements, as well as earn income from the excess power generated. On bright sunny days, buildings can generate enough solar energy to power appliances, lights, water heating systems, etc.
• On-grid solar systems are very cost-effective and easy to install. • Businesses can recoup the cost of their investment by offsetting electricity bills in just 3-8 years. If a private, commercial or industrial building sets up a solar PV rooftop system it will be eligible to avail an ‘Accelerated Depreciation Benefit’ which is currently 80% in a year. At this rate, a business can completely depreciate the whole value of the project in approximately 4 years. • Residential users and business owners can earn a passive income for the surplus energy generated by the system.
Off-grid systems work independently of the grid but have batteries which can store the solar power generated by the system. The system usually consists of solar panels, battery, charge controller, grid box, inverter, mounting structure and balance of systems. The panels store enough sunlight during the day and use the excess power generated in the night. These systems are self-sustaining and can provide power for critical loads in areas where a power grid is not available. However, these systems require specialized equipment to function and can be costly to install. These are ideal for businesses which can sustain for a short period of time with no electricity.
• Electricity supply in rural and remote areas - Off-grid solar systems can facilitate independent, long-term and sustainable electricity generation in rural and remote areas. • Power back up in areas with frequent electricity cuts - A number of places in India face frequent power cuts due to power transmission malfunctions, which can hamper operations of companies and public institutions. Off-grid solar systems can provide an economical and viable long-term backup solution to overcome the problems occurring during frequent power cuts.
• These self-sustainable systems can work independently and do not rely on the grid. • They generate enough power that can be stored and used at night or when the power grid is down. • These are ideal for remote areas where there is no power access from the grid. • Grid failures and shutdowns will not affect your power supply.
When choosing a type of solar system for home, institute, business or industry, mostly choose either an on grid solar system or an off grid solar system. But now one more option is available and that is "HYBRID SOLAR SYSTEM". A hybrid solar power system is combination of on grid solar system and off grid solar system. It has battery backup in it to store power and it also have the ability to feed surplus electricity into main grid. We can say that, on grid solar system + off grid solar system = hybrid solar system. It means that even during a power-cut your system will work, you still have electricity. Hybrid system is a combination of solar energy storage with grid connection.
Hybrid system is fully automatic, programmable and custom engineer system. Which provides a smart hybrid combination of all energy sources to you. • Solar panel will run you connected load. • Meanwhile extra electricity will be stored to the solar battery. • Surplus electricity will be fed back to the electricity grid by hybrid solar inverter.
After installing hybrid system, you have 3 option available to run your load. Or you can say hybrid inverter will run your load automatically on below option. • 1st priority solar panel will run you connected load. • 2nd priority battery bank will be used up to 60%. • 3rd priority electricity grid will be used in case of extra uses.