A sunny afternoon can leave a well-sized solar system producing more electricity than your home can use. That surplus does not need to go to waste. The right solar export tariff options can pay you for electricity sent to the grid, helping your panels deliver a better return over their lifetime.
For most households, though, the highest export rate is not automatically the best deal. Import prices, battery usage, meter compatibility and tariff terms all affect what you keep in your pocket. A little comparison before signing up can make a meaningful difference.
What is a solar export tariff?
A solar export tariff pays you for each unit of electricity, measured in kilowatt-hours (kWh), that your solar panels export to the national grid. It is separate from the price you pay to buy electricity from the grid.
In Great Britain, the main framework is the Smart Export Guarantee, usually called SEG. Energy suppliers with more than 150,000 domestic customers must offer at least one SEG tariff, although the rates and conditions are set by each supplier. Smaller suppliers may offer tariffs too, often with different rates or features.
To receive SEG payments, your system will normally need to be installed by an MCS-accredited installer, and you will need a suitable export-capable smart meter. Your installer should provide the documents needed to register the system, including the MCS certificate and commissioning paperwork.
If your solar panels were installed under the older Feed-in Tariff scheme, your arrangements may be different. You may still receive generation payments under that scheme, while export is often paid on a deemed basis rather than measured half-hourly. It is worth checking before changing anything, particularly if you have an older system.
The solar export tariff options to compare
Export tariffs are not all built the same. The best choice depends on when you export electricity, whether you have battery storage, and whether you are happy with a tariff whose rates can move.
Fixed-rate SEG tariffs
A fixed-rate tariff pays the same amount for every kWh you export, regardless of the time of day. It is the easiest option to understand and suits homes without a battery, where most excess generation happens during daylight hours.
The advantage is certainty. You can estimate your likely export income from your expected surplus generation. The trade-off is that a flat rate may not reward you for exporting at times when electricity is particularly valuable to the grid.
Time-of-use export tariffs
Time-of-use tariffs offer different export rates at different times. Some can pay more during evening peaks or other periods of high demand. These tariffs can be attractive for homes with solar batteries, because the battery can store daytime generation and export it later when the rate is higher.
There is more to consider, however. Battery cycling can reduce its usable life over time, and a high evening export rate may be paired with a more expensive import rate at other times. It only makes sense if the whole tariff works for your household, not just one impressive headline rate.
Tariffs linked to a specific import supplier
Some suppliers offer their strongest export payments only if you also take their electricity import tariff. This can be convenient because both sides of your energy account sit with one provider. It can also be a good fit where the import and export tariffs are designed to work together.
Do not assume it is always cheaper. Compare the unit rate and standing charge for imported electricity as well as the export payment. A slightly higher export rate can be outweighed by higher costs for the electricity you still need from the grid, especially through winter.
Flexible or variable export tariffs
Variable tariffs can change over time, sometimes following wholesale market conditions. They may offer opportunities for households that can shift battery charging, appliance use and exporting around price signals.
They require more attention and greater tolerance for change. For a household that wants predictable bills and minimal tariff management, a straightforward fixed SEG rate may be the more comfortable choice.
Why self-use usually matters more than export income
Export payments are useful, but using your own solar electricity is generally worth more than selling it. Every kWh you use directly in your home avoids buying a kWh from the grid at your import tariff rate.
That is why solar systems should first be designed around your actual electricity use. Running appliances such as washing machines, dishwashers or hot-water heating during daylight can increase the value of your generation. A battery may raise self-consumption further by storing surplus solar energy for use after sunset.
For example, if you export a unit of solar electricity, you receive the export rate offered by your supplier. If you use that same unit instead of importing power later, you avoid paying your household import rate. The difference can be substantial, although the precise numbers depend on your tariff.
This does not mean you should ignore export rates. A competitive tariff improves the value of unavoidable surplus, particularly in summer. The sensible aim is to use as much solar electricity as practical, then secure fair payment for what remains.
Do you need a battery for the best export tariff?
No. A battery is not required to receive SEG payments, and a standard solar installation can export automatically once it is connected, commissioned and registered correctly.
A battery can give you more control, though. It can keep solar generation available for the evening, reduce grid imports, and potentially allow export at higher-value times under a suitable time-of-use tariff. For households with high evening use, this can be more valuable than exporting everything during the afternoon.
The case is not identical for every property. Batteries add upfront cost, and their financial benefit depends on your consumption pattern, solar array size, tariff choices and how long you expect to stay in the property. A reputable installer should explain projected savings without assuming that a battery is essential.
Smart meter and installation requirements
Accurate export readings are central to most modern solar export tariff options. Your electricity supplier will normally use readings from a compatible smart meter to calculate how much electricity you have sent to the grid.
Before choosing a tariff, check that your meter is set up to record exports correctly. Ask the supplier whether it needs to enrol the meter in its system and whether there are any delays before payments begin. Keep a record of your export readings during the first few billing periods so you can sense-check the figures.
For new solar projects, MCS accreditation matters. It provides the certification usually required for SEG eligibility and gives reassurance that the installation has been completed to recognised standards. It is also sensible to confirm that your installer handles the grid connection notification and supplies every document you will need after installation.
Questions to ask before switching
Tariff rates change regularly, so focus on the terms as well as the headline payment. Before applying, ask whether you must take the supplier’s import tariff, whether there is a contract length or exit fee, how often rates can change, and how payments appear on your bill.
Also check how battery exports are treated. Some tariffs place conditions on electricity exported from a battery, particularly where it may have been charged from the grid rather than from your solar panels. Others require particular smart-meter settings or half-hourly readings.
For commercial properties, the picture can be more complex. Export volumes may be larger, consumption patterns may differ sharply from domestic use, and a business may have a bespoke supply contract. A commercial installer and energy supplier can help assess whether export payments, onsite consumption or battery storage offers the strongest value.
Choose the tariff after the system is designed
Your export tariff should support the solar system you actually need, rather than dictate it. A large array may generate attractive summer exports, but a system that matches your roof, budget and daily usage is usually the better long-term investment.
When comparing installation quotes, ask each MCS-accredited installer how they expect the proposed system to perform, how much energy you are likely to use versus export, and whether a battery is justified by your habits. Solar Planet can help homeowners and businesses compare vetted local installers, so those questions are answered before you commit.
A fair export rate is a welcome extra. The real confidence comes from a well-designed installation, accurate metering and a tariff that makes sense for the way your property uses energy.
