What is Grid-Tied System?
A solar system connected to the electricity grid, allowing import of power when needed and export of surplus.
Quick Answer
Almost all residential solar installations in the UK are grid-tied. The system connects to the DNO grid via your existing electricity supply. Grid-tied systems benefit from export payments under the Smart Export Guarantee. Off-grid systems are rare in the UK and only found in very remote locations.
Fact-checked by John Rooney, Solar Energy Editor. Editorial policy
Grid-Tied System Explained
A grid-tied (or grid-connected) solar system is connected to the local electricity grid. When solar production exceeds household demand, surplus electricity is exported to the grid for payment. When demand exceeds production (at night or on cloudy days), electricity is imported from the grid normally. Grid-tied systems are the most common type of residential solar installation. They do not provide power during grid outages due to anti-islanding protection.
How Does Grid-Tied System Work in the UK?
Almost all residential solar installations in the UK are grid-tied. The system connects to the DNO grid via your existing electricity supply. Grid-tied systems benefit from export payments under the Smart Export Guarantee. Off-grid systems are rare in the UK and only found in very remote locations.
Frequently Asked Questions
Can I go off-grid with solar in the UK?
Technically possible but impractical and expensive for most homes. You would need a very large battery bank to cover winter shortfalls. Grid-tied with SEG export payments is far more cost-effective.
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John Rooney is the founder of Solar Info and has been covering the UK solar energy market since 2023. He fact-checks all content against official MCS and Ofgem data and maintains relationships with MCS-certified installers across the UK.