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
What Does 1 kWp Mean in Solar Power Systems?
1 kWp is a standard unit used to measure the capacity of a solar power system under ideal conditions. This guide explains what 1 kWp means, how much energy it produces, and why it matters for system sizing.
Solar Savings Made Simple: Know Your Cost Cuts in 2025
Maximize your solar savings in 2025. Learn how solar energy reduces electricity costs for homes and businesses.
Should You Switch to Solar in India? Complete Guide
India has become a hot-selling solar market and people are interested in installing solar systems in their homes as well as in industries and factories.
India and Japan Strengthen Renewable Energy Cooperation
India and Japan have initiated a partnership under the Asia Energy Transition Initiative (AETI) to support India’s clean energy transition. India has set an ambitious target of achieving net-zero by 2070, while Japan aims to achieve the same by 2050.
What Is Renewable Energy? What Is the Best Source of Renewable Energy and Why? – Complete Guide
Renewable energy comes from natural sources like sunlight, wind, water, and biomass that are constantly replenished. As India accelerates its transition toward clean energy, understanding different renewable energy sources and identifying the most efficient and cost-effective option is crucial. This complete guide explains renewable energy types, their advantages, and compares them to determine the best source based on sustainability, scalability, and long-term benefits.
Delhi Jal Board Solar Project: A Step Towards Sustainable Energy
Delhi Jal Board has embraced solar power, becoming a leader in renewable energy adoption. This initiative highlights the benefits of solar energy, including cost savings, sustainability, and promoting clean energy practices in institutional operations.
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.
How the RESCO Model Works in Solar: A Complete Guide for Industries
The RESCO model allows businesses to adopt solar with zero upfront investment. Under this model, a developer installs, owns, and operates the solar plant while you simply pay for the power you consume—making clean energy both affordable and hassle-free.