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
Single Line Diagram (SLD) in Solar PV Systems: Complete Guide to Design, Symbols & Reading
Learn how to fetch a Bill of Material (BOM) for a solar PV system directly from design documents like SLD, layout, and GA drawings. This step-by-step guide helps installers and EPCs ensure accurate material estimation and efficient project execution.
How to Clean and Maintain Solar Power System for Maximum Efficiency
Regular cleaning of your solar power system is essential to maintain maximum efficiency and energy output. Dust, bird droppings, and pollution can reduce performance by up to 20%. This blog explains the right cleaning methods, schedules, and safety tips for residential, industrial, and commercial solar systems.
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.
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
New Loan Scheme for solar rooftop projects by IREDA
Solar installation for petrol pumps offers huge savings and energy independence. This 2025 guide explains system cost, subsidy, ROI, and installation process.
How to Choose Solar Panel Mounting Structures for Home, Industry & Commercial Installations
Choosing the right mounting structure is crucial for solar panel efficiency and durability. This blog explains various types of mounting structures for residential, industrial, and commercial solar installations, including rooftop, ground-mounted, and hybrid systems, to help you make an informed decision.
UP Government Incentive: Stamp Duty Exemption for Solar Land
Uttar Pradesh offers stamp duty exemption on land for solar projects, encouraging investment and growth in renewable energy.
How Total Solar PV Power Affects Solar System Efficiency
Total solar PV power represents the combined power output of a solar photovoltaic system. This guide explains its meaning, calculation, and how it directly impacts solar performance, efficiency, and long-term energy generation.