Smart Export Guarantee (SEG) for Businesses
Get Paid for Surplus Solar Energy
Commercial solar PV systems do not just reduce electricity bills — they can also generate income through exported electricity.
Under the UK Smart Export Guarantee (SEG), eligible energy suppliers must offer payments for surplus electricity exported to the grid from qualifying renewable energy systems.
This applies to commercial solar installations as well as residential systems.
How the Smart Export Guarantee Works
When a business generates more electricity than it uses on-site, the excess energy can be exported back to the grid.
Through the SEG, businesses receive payment for this exported electricity.
The amount earned depends on factors such as:
- export volume
- tariff structure
- supplier rates
- system usage patterns
Different suppliers offer different export tariffs, so reviewing available options regularly can be worthwhile.
Export Tariffs Can Vary
SEG tariffs are not fixed across the market.
Some suppliers offer:
- fixed export rates
- flexible tariffs linked to wholesale electricity prices
- smart tariffs with time-based export rates
Because rates can change over time, businesses exporting significant amounts of electricity may benefit from periodically reviewing their agreement.
How Usage Patterns Affect Export Income
The financial benefit of SEG payments often depends on how the building uses electricity throughout the day.
For example:
- businesses operating mainly during daylight hours may use most solar energy on-site
- buildings with lower daytime usage may export more electricity
- weekend closures can increase export volumes
The balance between self-consumption and export plays an important role in the overall financial performance of a solar installation.
Battery Storage Can Improve Flexibility
Battery storage systems can add further flexibility to commercial solar projects.
Depending on the system design and tariff structure, batteries may help businesses:
- store surplus solar energy
- reduce peak electricity imports
- optimise time-of-use tariffs
- control when electricity is exported
In some cases, this can improve the overall value of both solar generation and exported electricity.
Part of a Wider Energy Strategy
For many businesses, export payments form one part of a broader energy management strategy rather than the main financial driver.
The strongest commercial solar returns often come from:
- reducing imported electricity
- improving energy independence
- managing peak electricity costs
- stabilising long-term energy expenditure
However, SEG income can still make a useful contribution to overall project value.
Turning Solar Energy into Long-Term Value
The Smart Export Guarantee gives businesses an additional way to benefit from commercial solar PV installations.
Combined with reduced electricity bills and improved energy resilience, export payments can help strengthen the long-term financial case for investing in renewable energy.