Export income estimator

This tool helps you estimate the annual income you could receive by exporting excess electricity to the national grid through a Smart Export Guarantee (SEG) tariff.

To get an accurate estimate, you’ll need to know your system’s estimated annual generation and your export tariff rate.

A typical 4kWp solar system in the UK generates around 3,500kWh per year.

How much of your generated electricity do you use at home? (Typical: 25% without battery, 70% with battery).

Standard SEG rates are currently around 5p to 15p per kWh.

p

Estimated Annual Income

£0.00

Breakdown

Annual Generation	0 kWh
Energy used at home	0 kWh
Energy exported to grid	0 kWh
Annual income	£0.00

This is an estimate based on your inputs. Actual income will depend on your solar panel performance, actual energy usage patterns, and your specific tariff agreement.

How the calculation works

We calculate your export income based on the following formula:

1. Total Generation: The total amount of electricity your solar panels produce in a year (in kWh).
2. Self-consumption: The percentage of that electricity you use in your home. This is energy that isn’t exported.
3. Exported Energy: Total Generation minus the energy used at home.
4. Income: The Exported Energy multiplied by your export tariff rate (usually in pence per kWh).

Typical self-consumption rates

• Standard home (no battery): 20% to 30% self-consumption. Most energy is generated during the day when people are out.
• Home with a battery: 60% to 80% self-consumption. Excess energy is stored and used in the evening.
• Home with EV charging: 50% to 70% self-consumption, if charging during the day.

Next steps

If you’re happy with your estimated income, make sure you:

• Compare tariffs: Check our Tariff comparison guide to find the best SEG rates.
• Check your equipment: Ensure you have a smart meter and an MCS-certified installation to be eligible for payments.
• Apply to a supplier: Contact an SEG licensee to start your application.