good fit
Good fit: measured load and configurable battery
Known half-hourly imports, exports and device limits support a realistic comparison.
Household decision guide
Best Octopus tariff for a home battery: what to compare
Compare Flux, Intelligent Flux and Agile plus export structures using capacity, power, losses, control and price-risk considerations.
Edited by Rob Gibbs. Guidance reviewed: .
Short answer
A battery creates flexibility but not guaranteed profit. Flux provides defined import/export periods, Intelligent Flux depends on supported managed control, and Agile plus a compatible export tariff exposes changing prices. The result depends on usable capacity, power limits, losses, household load and the dispatch you can actually achieve.
Who this is for: Homes with battery storage, with or without solar, deciding between manual and supplier-managed tariff structures.
Fit check
poor fit
Poor fit: ideal lossless cycling
A calculation that ignores conversion loss, power caps, reserve and household load will overstate the available value.
verify first
Verify first: control and compatibility
Confirm the exact battery, export setup, allowed pair and who controls dispatch.
How to compare in practice
Step 1
Set the physical operating envelope
Start with usable capacity, charge and discharge power, reserve level and round-trip efficiency. These constraints decide how much energy can actually move between tariff periods.
Step 2
Replay realistic household days
Simulate charging and discharging against measured household import, solar generation and export. Keep state of charge continuous between days instead of assuming a full battery whenever a high price appears.
Step 3
Compare the complete tariff pair
Cost imports, export payments and the standing charge together, then stress-test smaller price spreads and missed cycles. A result that only works with perfect foresight is not a dependable household comparison.
Numbers to collect before comparing
Better inputs matter more than a generic winner. Gather these before using a tariff calculator or asking Octopus for an eligibility check.
Battery limits
Record usable kWh, maximum charge and discharge kW, reserve settings, estimated round-trip efficiency and any warranty or cycle preferences you intend to respect.
Household energy history
Collect half-hourly import and export plus solar generation where available. A battery cannot export energy that the home has already consumed.
Control constraints
Note supported integrations, inverter mode, internet reliability and whether you or Octopus controls dispatch. Include any periods when backup reserve must be maintained.
Equipment and controls
Usable energy and power are different
Usable kWh limits how much can be moved; charge/discharge kW limits how quickly. Reserve settings, state of charge and round-trip losses reduce the idealised opportunity.
Meter requirements
Working half-hourly operation matters
Owning a smart meter is not the same as Octopus being able to communicate with it and receive the readings a tariff needs. Confirm the meter, consent and data flow during signup.
Import and export channels
Battery tariffs involving export need working import and export arrangements. A device portal is not a substitute for supplier billing data.
Eligibility to verify
Managed control is device-specific
Intelligent Flux and add-ons require supported batteries and permissions. Confirm the exact model, firmware, connectivity and current tariff terms.
Import tariff structures to compare
Octopus Flux
Defined time bands can support a repeatable manual battery schedule.
Watch: Peak exposure and losses can make an assumed cycle uneconomic.
Intelligent Octopus Flux
Managed control can reduce daily scheduling work for supported batteries.
Watch: Octopus controls eligible operation and compatibility can change.
Agile Octopus
Half-hourly variation can create charging opportunities.
Watch: Future spreads are unknown and may be too small after losses.
Export choices and pairing
Outgoing Octopus Agile
Dynamic export can reward controllable discharge timing.
Watch: High rates and sufficient stored energy must coincide; future earnings are not guaranteed.
Outgoing Octopus
Flat export is simpler.
Watch: It may value timed export less than a dynamic structure in some periods.
Check the complete pair
A good-looking import curve can be incompatible with the desired export product. Flux structures also need to be understood as linked import/export arrangements.
Effort and automation
Manual versus managed dispatch
Manual schedules retain control but need upkeep. Managed products reduce intervention but grant device-control rights and can override a household assumption.
Price risk
A spread is not net profit
Account for charging cost, conversion losses, degradation preferences, standing charges and export payment timing. This site does not model personal dispatch or earnings.
Standing charges
Add the fixed daily cost
Battery arbitrage changes kWh timing, not the fact that an import standing charge may be due each day.
The answer changes when…
- Usable capacity or charge/discharge power changes.
- Round-trip losses consume more of the price spread.
- Solar generation fills the battery before a cheap import period.
- A managed product gains or loses device support.
Questions people ask
Does a home battery guarantee Agile savings?
No. Savings require sufficient price spreads, feasible timing and a dispatch that survives losses and household demand.
Is Intelligent Flux available for every battery?
No. It depends on Octopus supporting and successfully connecting to the exact setup.
Does OctoTariffs calculate battery earnings?
No. It shows tariff evidence but does not model personal battery dispatch, degradation or future earnings.
Continue your comparison
Limits of this guide
This guide compares public tariff structures. It is not a switching quote, eligibility decision, bill forecast or equipment-performance guarantee. Verify live rates, standing charges, product terms, device support and meter operation with Octopus before switching.
Primary sources
- Smart Tariffs terms and conditions — Octopus Energy; checked 2026-08-24. Smart-tariff eligibility, rate windows, compatibility and publication caveats.
- Solar and battery support — Octopus Energy; checked 2026-08-27. Supplier guidance on solar self-consumption, battery use and import/export tariff pairing.
- Export tariffs terms and conditions — Octopus Energy; checked 2026-08-27. Export contract, metering, MPAN, half-hourly data and generation eligibility requirements.
- Charge Pack — Octopus Energy; checked 2026-08-27. Current battery add-on description, compatible base tariffs and equipment requirements.