Grid Arbitrage Economics
The Smart Export Guarantee: How to Force the Grid to Pay You.
Executive Summary
The Smart Export Guarantee (SEG) is a statutory obligation on licensed energy suppliers under the Smart Export Guarantee Order 2019, requiring them to pay homeowners for surplus solar electricity exported to the grid. To qualify, your system must be installed by an MCS-certified company. By integrating a smart battery, homeowners can store surplus power during the day and discharge it to the grid during peak evening hours, securing the highest possible market export rate per kilowatt-hour.
The End of the Feed-In Tariff, The Rise of Active Arbitrage
The legacy Feed-In Tariff (FIT) paid you simply for generating power. The modern SEG pays you for exporting power. This fundamental shift means the smartest homes are treating their roofs like micro-trading floors. If you export solar in the middle of a sunny afternoon, the grid pays you a baseline rate. But if you hold that power in a Duracell Dura5 or Tesla Powerwall 3, and export it at 6:00 PM when national demand spikes, your yield multiplies.
The MCS Gateway
Licensed energy suppliers are not obligated to pay you unless your system is MCS-certified. Access to SEG tariffs legally requires a Microgeneration Certification Scheme (MCS) certificate from a registered installer. Every First Choice Solar installation clears the MCS audit by default — every First Choice Solar customer qualifies for SEG from day one.
How to Register for SEG in Four Steps
Receive your MCS installation certificate from First Choice Solar (issued within 10 working days of commissioning). Apply to your chosen energy supplier's SEG tariff — you may choose any eligible supplier. Confirm your smart meter is in place. Export payments begin on your next bill. SEG rates are set by individual energy suppliers and change regularly; First Choice Solar does not guarantee any specific export rate.
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Technical Accuracy Pledge
Every figure in this article is sourced from manufacturer datasheets and independently verifiable accreditation registers. Last reviewed: May 2026.