Solar Rooftop Projects: Benefits of Intentional Islanding for Power Backup
Solar Rooftop Projects: Benefits of Intentional Islanding for Power Backup
Intentional Islanding in solar
Intentional Islanding in solar occurs when a solar rooftop system continues to supply to a load even when the grid is down; this can be very dangerous. Therefore, when the grid is down, the inverter, used in the rooftop system solar power plant for generating solar energy for home/industrial/commercial roof top, stops supplying power.
Intentional Islanding in solar is a technical requirement for inverters strictly mandated by CEA and MNRE. However, in view of frequent grid outages in most States, particularly in industry, commercial and institutional establishments, the rooftop system should be able to disconnect from the grid. Thus system should supply continuously solar power to the loads of such establishments using a battery storage system or in synergy with the backup diesel generator. Otherwise, the solar power will be wasted.
Intentional Islanding in Solar Option 1
Intentional Islanding in solar is possible through additional advanced features to be provided in inverters. The hybrid inverter which could work in the off-grid mode and continue to charge batteries with generated power. The inverter can continue to function in grid-tied mode in synergy with the larger backup diesel generator.
Intentional Islanding in Solar Option 2
Generally, for most industrial, commercial and institutional establishments, the second option is more feasible as they have large existing backup diesel generators for their loads. Such backup facilities already have the required safety features which prevent reverse flow to the grid.
Rooftop solar with the right type of inverter is, therefore, technically feasible even when the grid is down, and can also be more cost-effective compared to costlier diesel generation.
For harnessing the full potential of rooftop solar as envisioned by Government, CEA and MNRE should consider allowing such ‘intentional islanding in solar’ rooftop projects. They should formulate technical specifications of inverters with such additional advanced features for automatic and safe operation.
Ref: Grid Integration of Distributed Solar Photovoltaics (PV) in India, Prayas Energy Group, 2014
Suggested Articles
Solar O&M Services: How to Ensure Peak Performance & Maximum Power for Solar System
Discover how Solar O&M services keep your solar system running at its best. From routine maintenance to performance monitoring, ensure maximum power and efficiency.
Rajasthan Rooftop Solar Subsidy: What Homeowners Need to Know
Rajasthan homeowners can save big with the 2025 rooftop solar subsidy. Learn about the updated rates, eligibility criteria, and benefits to make your switch to solar more affordable.
Net Metering and Its Advantages Explained: How Solar Users Save More on Energy Bills
Learn what Net Metering and its advantages mean for you—cut electricity costs, earn energy credits, and boost solar efficiency easily.
How to Improve Energy Efficiency and Save Electricity Costs
Learn how energy conservation and efficiency can help you save electricity, cut costs, and make your home or business more sustainable
What Is Solar Performance Ratio (PR)? Meaning, Formula & Importance
Solar Performance Ratio (PR) is a key indicator of how efficiently a solar power system converts available sunlight into usable electricity. This guide explains what PR is, how it is calculated, why it matters, and how it directly impacts your solar system’s actual energy output.
Difference Between an On-Grid Inverter and a Hybrid Solar Inverter
Confused between an on-grid inverter and a hybrid solar inverter? This blog explains their differences, advantages, and which solar inverter is right for you.
Solar PPA for Commercial Buildings: Cost, Benefits & Savings
Looking to cut electricity bills without investing in solar assets? Commercial Solar PPA providers offer zero-investment solar solutions where businesses pay only for the power generated—simple, risk-free, and cost-effective.
Difference Between Single-Phase and Three-Phase Voltage and Its Use for Solar PV Installer – Complete Guide
Understanding the difference between single-phase and three-phase voltage is essential for solar PV installers. While single-phase supply is common in residential systems, three-phase power is widely used in commercial and industrial solar projects. This complete guide explains electrical phase differences, applications in solar installations, and how choosing the right phase connection impacts system efficiency, safety, and performance.