MCS, grants and export
Best UK Tariffs for Solar, Battery and EV in 2026
Having solar panels, a home battery, and an electric vehicle together unlocks tariff options that none of them can access alone. Picking the right combination can make the difference between a system that pays back in eight years and one that pays back in twelve. Here is a plain guide to which UK tariffs stack best in 2026, and what actually drives the savings.
Helpful video. “Best Solar, Battery & EV Tariffs for 2026 | UK Homeowners Guide” from a UK home energy advice channel covers the main tariff options for households with solar, battery, and EV in practical detail, with examples of how the numbers work out.
1. Why the combination changes the tariff picture
A household with only solar panels has one variable: how much it exports versus self-consumes. A household with a battery as well can shift consumption in time: charging the battery on cheap overnight electricity and using it in the evening instead of drawing from the grid. Add an EV to that picture and the overnight charging window becomes even more valuable, because a 60 kWh EV battery can absorb several units of cheap electricity every night.
The tariffs that exploit this time-shifting potential are the ones worth comparing. Flat-rate tariffs, where import and export prices are the same at all times of day, do not reward a battery or EV owner for charging at 3am instead of 6pm. Smart time-of-use tariffs do.
2. The two legs of any solar tariff decision
Every tariff choice for a solar-plus-battery household has two legs: the import rate (what you pay per kWh you draw from the grid) and the export rate (what you are paid per kWh you send back under the Smart Export Guarantee).
The best outcome needs both legs to be competitive. A tariff with a brilliant overnight import rate but a weak export rate loses money on the solar side. A tariff with a strong export rate but a high flat import rate loses money on the battery-charging side. The question is which combination of import tariff and export rate maximises your annual net bill reduction.
3. Octopus Flux: designed for solar and battery households
Octopus Flux is currently the most tailored tariff in the UK for households with solar and a battery. It runs on three pricing windows across the day: a high import rate during the evening peak (4pm to 7pm), a low import rate overnight (2am to 5am), and a standard rate in between. Crucially, the export rate mirrors the import rate: you earn a premium rate when you export during the morning and evening peaks, and a standard rate at other times.
A household with a smart battery can take full advantage by scheduling overnight charging during the cheap window and directing the battery to export during the peak windows. Solar generation during the day adds to this by covering daytime loads without drawing from the grid.
The limitation is that Flux requires a Flux-compatible battery with automated scheduling, and your inverter must support integration with Octopus’s Kraken platform. Check current inverter compatibility before switching.
4. Intelligent Octopus Go: the EV plus battery combination
Intelligent Octopus Go is primarily an EV tariff, offering a cheap overnight charging rate (currently around 7 to 8p/kWh) for six hours overnight, compared with around 25p/kWh during the day. For a household with an EV and a compatible battery, both devices can charge during the cheap window.
Paired with Octopus Outgoing as the export tariff (which pays around 15p/kWh for exported solar), Intelligent Octopus Go is often the strongest all-round combination for solar-battery-EV households: cheap overnight charging for both the battery and the car, plus a fair export rate for surplus solar during the day.
The key constraint is smart EV charger compatibility. Ohme, myenergi zappi, and certain other chargers integrate directly with the Octopus platform and shift the charging slot automatically without manual scheduling.
5. Agile Octopus: for households with automated battery control
Octopus Agile prices electricity on half-hourly intervals based on the wholesale market. During periods of high renewable generation (particularly overnight in windy conditions), import prices can drop to near zero or even go negative (meaning Octopus pays you to consume electricity). A battery that can respond automatically to these price signals, charging when prices are lowest and discharging when they are highest, can deliver exceptional savings.
The trade-off is unpredictability. Agile prices are published the evening before, so you cannot plan weeks ahead, and the cheap windows vary day to day. If your battery does not have automated Agile scheduling support (via an integration such as GivEnergy’s SolisCloud or a third-party tool like Sunsynk Connect or Solar Assistant), you will miss most of the savings and may find yourself importing at high prices if demand spikes unexpectedly.
6. Export rate: checking the SEG rate separately
The Smart Export Guarantee rate you receive for exported solar is set by each supplier independently and is separate from your import tariff. It pays to check the current SEG rates at the time you are switching, because they move around.
As a rough guide in mid-2026, the most competitive export-only rates for solar owners are: Octopus Outgoing at around 15p/kWh (flat), Good Energy Solar Savings Exclusive at around 24p/kWh (requires a qualifying battery install), and EDF Export Exclusive at around 18p/kWh for an initial period. On a Flux tariff, the effective peak export rate is higher than most standalone SEG deals during peak windows, but lower during off-peak times.
Rates change regularly. Use a comparison tool or ask your installer to check current offers at the time of your installation, rather than relying on figures you saw in a guide written months earlier (including this one).
7. What to check before switching
Before switching tariff, confirm three things. First, that your battery inverter supports the tariff’s smart scheduling via a native integration (not a workaround). Second, that the standing charge on the new tariff does not wipe out the savings from the cheaper import rate, particularly for smaller properties. Third, that the export rate and the import tariff are offered by the same supplier or are compatible if they are from different suppliers, since some SEG deals require you to hold your import tariff with the same company.
If you are in the process of choosing your solar and battery system rather than switching an existing one, it is worth discussing with your MCS-certified installer which inverter brands have the best current tariff integrations: that can be a meaningful factor in which hardware makes the most financial sense for your household over a ten-year horizon.
Frequently Asked Questions
Which tariff is best for solar, battery, and EV together?
For most UK households with all three in 2026, Octopus Flux (if your battery supports it) or Intelligent Octopus Go plus Outgoing export is the strongest combination. Flux is optimised specifically for solar-plus-battery households, with premium export rates during morning and evening peaks. Intelligent Octopus Go adds a cheap overnight window for EV and battery charging. Check current rates at the time of switching, as the specific pence figures change.
Do I need to be with Octopus Energy to get the best solar tariff?
No, though Octopus currently offers the widest range of solar-aware tariffs in the UK. Good Energy’s Solar Savings and EDF’s Export Exclusive offer competitive SEG export rates that you can sometimes pair with a different supplier’s import tariff. The practical constraint is that your battery inverter needs to support the tariff’s smart scheduling features, and Octopus currently has the most integrations with UK inverter brands.
What export rate should I expect in 2026?
Standard Smart Export Guarantee rates in 2026 range from around 8p/kWh at the lower end to around 24 to 30p/kWh at peak periods on a Flux-style tariff. The best rates require a smart meter, a compatible battery, and the ability to time exports to hit peak windows. A flat-rate SEG deal of 12 to 18p/kWh from larger suppliers is more predictable but typically earns less overall for a well-managed battery system.