Intelligent Octopus Flux explained: what changes when Octopus runs your battery

Quick answer: Intelligent Octopus Flux is the automated version of Flux: Octopus schedules your battery’s charging and discharging for you, and export earns the same rate you pay to import (around 21.7p/kWh off-peak and 28.9p/kWh at the 4pm to 7pm peak in Manchester, checked August 2026). Sunsave models a typical solar-and-battery home at about £1,067 a year better off.

How does Intelligent Octopus Flux work?

You hand Octopus the keys. Connect a compatible battery and Octopus’s software decides when it charges, holds and discharges, using weather and usage forecasts; you don’t set daily schedules at all (Sunsave, checked August 2026). The tariff’s shape is simple: a premium window from 4pm to 7pm, standard rates the rest of the day.

The unusual part is the symmetry. At any moment on Intelligent Octopus Flux, a kWh you export earns exactly what a kWh you import would cost. Both rates rise together for the 4pm to 7pm peak, so the algorithm fills your battery when power is cheap and sells your surplus when it’s dear. The tariff was open to new sign-ups when we checked Octopus’s public tariff API on 1 August 2026.

How is it different from standard Flux?

Standard Flux is the manual version. It runs three fixed windows, a cheap import slot from 2am to 5am, a premium slot from 4pm to 7pm and shoulder rates between, with import and export priced separately in each (Energy Guide). You, or schedules you set in your battery app, do the driving. Our guide to Flux, Agile and Go for solar and battery owners compares the manual options in detail.

What are the rates right now?

Regional, and they move with wholesale prices, so treat these as a snapshot rather than a promise. Sunsave’s latest check (still current when we looked in August 2026) showed Manchester at 21.71p/kWh off-peak and 28.94p/kWh in the peak window, London at 23.45p and 31.27p, and Birmingham at 21.77p and 29.03p, with export earning the same figures (Sunsave).

For context, the July to September 2026 price cap unit rate is 26.11p/kWh (Ofgem). In the example regions above, off-peak Intelligent Flux sat between roughly 2.7p and 4.4p/kWh below the price cap unit rate, and the 4pm to 7pm peak is precisely what your battery exists to dodge. The North West standing charge on the tariff was 44.93p/day when we checked Octopus’s API on 1 August 2026. Octopus quotes your exact regional rates before you commit.

Who can sign up, and what kit qualifies?

The entry requirements are specific, and all of them are checked before you’re switched on.

• Octopus supplies both your import and your export electricity.
• Your solar has its MCS or Flexi-Orb certificate to hand.
• You have a compatible battery with an export MPAN set up.
• Your smart meter sends half-hourly readings.
• You run the Octopus app, and only one battery can be connected.

The compatible battery list, as of June 2026: AlphaESS, EcoFlow, Enphase, Fox ESS, GivEnergy, Hanchu ESS, Huawei, Sigenergy, SolarEdge, SunPower and Tesla (Save On Energy Bills). One asterisk on that list: GivEnergy filed for administration in April 2026. Installed GivEnergy batteries keep working, but cloud services may be disrupted, so existing owners should watch app connectivity (ESS News). No battery means no Intelligent Flux; the tariff exists to automate storage, not bare solar panels. If you’re battery-shopping partly to qualify, start with what size battery you need and adding a battery to existing solar.

What could you actually earn?

Sunsave’s modelling puts a typical solar-and-battery household about £1,067 a year better off on Intelligent Octopus Flux. That figure assumes 4.9kWp of solar, a 5.2kWh battery, 3,400kWh of annual consumption and 65% of generation exported, and splits into £893 of export earnings plus £173 trimmed from import costs (Sunsave). Treat it as a modelled estimate: a dull year, a shaded roof or heavy evening usage all pull it down.

Whether the underlying kit pays for itself is a separate sum; our guide to whether a solar battery is worth it in 2026 works through it.

Who should pick it, and who shouldn’t?

For most solar-and-battery homes that don’t want to think about tariffs, this is the sensible default: the automation does what a diligent owner would do, every day, without forgetting. The exceptions are real, though. Homes with heavy 4pm to 7pm consumption have less surplus to sell in the window that pays, and anyone who prefers to decide when their battery charges, discharges and exports is signing that control away; standard Flux keeps the manual levers (Save On Energy Bills).

If you have solar but no battery, you’re comparing export tariffs instead; our Smart Export Guarantee guide covers getting more from exports, and our smart tariff matcher lays the options out by setup. We’re a comparison site, not an energy supplier or installer. Our installer quote comparison launches soon; you can register interest here.

FAQs

Can I use Intelligent Octopus Flux without solar panels?

No. It requires certificated solar and an export MPAN as well as the battery. Battery-only households are pointed at Octopus’s other smart tariffs instead.

Will Octopus leave my battery flat when I need it?

The algorithm positions the battery for the profitable windows, especially 4pm to 7pm, and it manages the battery for your bill, not for backup. If you keep a reserve for power cuts, check what minimum charge level your battery app lets you protect.

How do I actually switch?

Through Octopus, with your MCS or Flexi-Orb certificate, battery details and half-hourly smart meter in place. Octopus verifies hardware compatibility before confirming, and the process is quickest if you already take both import and export supply from them.