If you’ve invested in solar panels and battery storage, choosing the right electricity tariff can have just as much impact on your savings as the quality of your installation. One of the most talked about options is Octopus Flux, a smart tariff designed specifically for homes with solar PV and battery storage.
But is Octopus Flux the right choice for your home?
At SolarTherm UK, we’ve helped thousands of homeowners across Essex, Kent, Suffolk, Hertfordshire and the wider South East and East Anglia maximise the value of their solar investment. This guide explains how Octopus Flux works, who it’s suitable for, how it compares with the Smart Export Guarantee (SEG), and whether it could increase your savings by making it easier to earn money from selling electricity to the grid.
What Is Octopus Flux?
Octopus Flux is a time of use electricity tariff from Octopus Energy that rewards homeowners who can intelligently manage when they use, store and export electricity. Unlike traditional electricity tariffs, Flux changes its import and export rates throughout the day.
This is to encourage households to store cheaper electricity overnight, use battery power during expensive high demand evening periods, taking strain off the grid and exporting excess solar energy when export payments are highest and the grid can use the additional supply during high demand periods.
For homeowners with solar panels and battery storage, this can significantly improve annual savings compared with a standard tariff.
How Does Octopus Flux Work?
The tariff divides the day into different pricing periods. Generally speaking:
- Off peak periods offer cheaper electricity for charging batteries
- Standard periods have average import and export rates
- Peak periods provide the highest export payments when electricity demand is greatest (but also the highest import rates)
This means your battery can charge overnight using cheaper electricity, store surplus solar generation during the day and power your home during expensive evening periods, exporting any surplus during the high value export windows. The result is greater control over your energy costs.
Why Battery Storage Makes a Difference
Although homeowners with solar panels can join export tariffs, Octopus Flux performs best when paired with battery storage. Without a battery surplus solar energy is exported immediately and evening electricity usually needs to be imported from the grid.
With a battery, solar energy can be stored for later use, electricity can be exported when prices are highest and cheap overnight electricity can also be stored for use during peak rate periods.
This flexibility allows homeowners to make much better use of time of use pricing. At SolarTherm UK, battery storage is one of the most common upgrades requested by homeowners looking to maximise returns from solar.
Is Octopus Flux Part of the Smart Export Guarantee?
Yes. The export element of Octopus Flux operates under the Smart Export Guarantee (SEG). The Smart Export Guarantee is a government backed scheme requiring larger electricity suppliers to pay eligible households for renewable electricity exported to the grid.
To qualify for SEG payments, homeowners generally need:
- MCS certified solar installation
- Smart meter capable of half hourly readings
- Eligible export meter readings
- A participating energy supplier
Unlike the original Feed in Tariff (FiT), SEG only pays for electricity that is actually exported.
Octopus Flux vs Standard SEG Tariffs
Many suppliers simply pay one fixed export rate under the Smart Export Guarantee. Octopus Flux differs because export payments vary depending on the time of day. For households with battery storage, this can offer greater earning potential because electricity can be exported during the most valuable periods.
Whether Flux outperforms a fixed SEG tariff depends on:
- Solar generation
- Battery size
- Household electricity usage
- Export habits
- Seasonal generation
Every home is different, which is why tariff comparisons should always be based on actual consumption data.
Can You Make Money Selling Electricity to the Grid?
Yes, one of the biggest advantages of modern solar systems is the ability to earn money by selling electricity to the grid. Whenever your solar panels generate more electricity than your home needs, the surplus can either charge your battery or be exported to the National Grid. Your energy supplier then pays you under your chosen export tariff.
Although export payments are unlikely to cover the full cost of your electricity bill, they can significantly improve the overall financial return from your solar installation.
Who Is Octopus Flux Best For?
Octopus Flux is generally well suited to homeowners who have solar PV panels, battery storage, a smart meter and flexible electricity usage. Homes that regularly charge an EV overnight may also benefit from comparing Flux with other specialist EV tariffs before deciding.
Is Octopus Flux Worth It Without a Battery?
Possibly, but usually not. Without battery storage, homeowners cannot choose when to export electricity. Most surplus generation is exported immediately, regardless of whether export prices are high or low. Battery storage provides the flexibility that allows households to take full advantage of Flux’s changing import and export prices.
How SolarTherm UK Helps You Choose the Right Tariff
Choosing between Octopus Flux, a standard SEG tariff or another export option depends on much more than headline rates. Our experienced team considers:
- Annual electricity consumption
- Solar generation estimates
- Roof orientation
- Battery capacity
- Future EV charging plans
- Household lifestyle
This allows us to recommend a solar system that works efficiently with your preferred energy tariff. Our goal isn’t simply to install solar panels – it’s to help homeowners achieve the greatest long term savings possible.
Why Installation Quality Still Matters
Even the best tariff cannot compensate for a poorly designed solar installation. Maximum returns depend on:
- Correct system sizing
- High quality solar panels
- Efficient inverter selection
- Appropriate battery capacity
- Professional installation
- Ongoing monitoring
At SolarTherm UK, every system is designed around each property’s energy usage rather than a one size fits all approach.
Our experienced, in house installers have been helping homeowners across Essex, Kent, Suffolk, Hertfordshire and the wider South East and East Anglia benefit from solar technology for more than 16 years. As an MCS certified, NICEIC approved installer and EPVS Gold Standard member, we ensure every installation is completed to the highest industry standards, giving customers confidence when applying for the Smart Export Guarantee and accessing leading energy tariffs.
Is Octopus Right for You?
For many homeowners with solar panels and battery storage, Octopus Flux can increase the value of their renewable energy system by combining lower import costs with higher export opportunities.
However, no single tariff suits every household. The best results come from matching your energy tariff with the right solar system, battery size and daily energy habits. If you’re planning a new installation or upgrading an existing system, SolarTherm UK can help you compare your options and recommend the most suitable solution for your property.
Contact SolarTherm UK today for a free, no obligation quote and design, tailored to your property, usage and future energy needs. No hard sell, just honest, expert advice – and the time you need to make an informed decision.
Your home. Your energy. Your future.
Frequently Asked Questions
Octopus Flux is a time-of-use electricity tariff designed for homes with solar panels and battery storage, offering different import and export prices throughout the day.
Yes. The export payments available through Octopus Flux are provided under the government’s Smart Export Guarantee (SEG) framework for eligible customers.
Yes, although homeowners with battery storage are generally able to achieve greater savings because they can choose when to import and export electricity.
Most homeowners will need an MCS-certified solar installation, a compatible smart meter and an eligible export tariff with a participating supplier.
Yes. Selling electricity to the grid can generate additional income while reducing the overall payback period of your solar panel system, particularly when combined with battery storage and a suitable export tariff like Octopus Flux.
