Octopus Agile vs Go for home battery owners: which saves more?

Octopus Go and Octopus Agile are both designed for homes with controllable demand. Both reward you for using electricity when the grid is cheap and clean. But they work very differently — and for battery owners, the right choice depends on something most tariff comparisons do not mention: whether your battery can act on the price signals through supported controls.

What Octopus Go actually offers

Go currently gives you a fixed cheap window. As of 24 April 2026, Octopus's public Go page describes a 00:30 to 05:30 off-peak window every night. Outside that window, you move back to the tariff's normal daytime rate. The exact unit rate varies by region and should be checked against Octopus's current quote for your postcode.

The window is predictable, and the rate is fixed for your tariff period rather than changing every half hour. You can configure many batteries to charge during that window and discharge during the rest of the day, but the setup still needs checking when your tariff terms, hardware, inverter topology, or household pattern changes.

In a simple worked example, a 10kWh battery charged cheaply overnight and used to avoid higher-priced evening imports can produce material savings over a year. The exact figure depends on round-trip losses, tariff region, seasonal use and whether the battery is actually full when evening demand arrives.

What Octopus Agile actually offers

Agile prices your electricity in 30-minute slots based on wholesale market conditions. On some days and in some regions, overnight slots can beat a fixed overnight tariff. On high-wind or high-solar days, some slots can even go negative, meaning eligible consumption in those slots may be credited rather than charged.

On expensive days — cold snaps, low wind, high demand — Agile can also become expensive. Octopus's Agile page is the right place to check the current regional pricing range before relying on any comparison.

Agile can beat Go on some nights, days and regions, but the variance is significant and the result depends on actual daily slots, season, usage and region.

The key variable: can your battery act automatically?

This is where most comparisons stop being useful.

On Go, your battery usually needs to do one thing: charge during the current off-peak window. A time-of-use inverter can often do this, if its import and charge settings match your battery topology. You still need to review it when your tariff, battery settings or household pattern changes.

On Agile, to benefit properly, your battery needs to:

• Read the 24-hour price schedule published each afternoon
• Identify the cheapest slots for overnight charging
• Adjust the charging window dynamically based on that day's prices
• Hold charge during any negative-pricing slots in the day
• Discharge during the most expensive evening slots

None of this happens automatically unless you have supported software that reads Agile prices and can control your inverter accordingly. Without it, you may just be using a fixed Go-like charging schedule on a tariff whose rates are volatile.

The realistic comparison

On Go (with a basic inverter schedule) A well-configured Go setup can capture the current overnight window reliably. The schedule is predictable and gives less exposure to half-hourly price swings. It is usually the safer baseline if your battery is following a fixed overnight schedule.

On Agile (without automation) If you manually set a fixed overnight schedule, you are broadly replicating Go — but with more exposure to expensive daytime rates if you import outside your schedule. In that setup, Agile often adds complexity faster than it adds value.

On Agile (with battery automation) This is where Agile may become better than Go on some days and regions. Software that reads the day-ahead price schedule and dispatches the battery into the cheapest slots — including opportunistic negative-price windows — can help add savings on top of a comparable Go setup, but the upside is highly setup-dependent.

What makes the automation work

Octopus publishes half-hourly prices for the following day each afternoon. A supported system that reads these prices and can control your inverter may help:

• Select the cheapest 5–6 hours overnight for battery charging, which may be cheaper than Go's fixed rate on some days and regions
• Flag any forecast negative-price slots the following afternoon or evening
• Hold the battery during expensive morning slots where control is supported, so charge is preserved for peak evening dispatch
• Adjust daily rather than on a fixed schedule

Some inverter ecosystems expose better tariff-aware scheduling than others. In practice, Solis homes usually need an external coordination layer for this kind of dynamic control, and only supported, verified setups should be automated.

Which should you choose?

Choose Go if:

• Your inverter cannot be controlled externally or via API
• You want a predictable charging schedule with limited configuration overhead
• You do not have software coordinating your battery with tariff prices

Choose Agile if:

• Your battery can be dispatched through supported automation based on published half-hourly prices
• You have solar and want to capture negative-price windows during the day
• You are willing to monitor peak-rate exposure or have software that handles it

The honest answer: Go is the safer default for many battery homes. Agile is the higher-ceiling option on some days and regions, but only if the battery can act on its prices. Without supported automation, the extra complexity of Agile adds risk without much additional reward.

Related reading

• Solis inverter and Octopus Agile: where external coordination helps
• Octopus Go vs Intelligent Go: which is better with a home battery?

Read how 1app.energy can help coordinate battery charging with Agile and Intelligent Go prices in supported homes.