Octopus Agile vs Go for home battery owners: which actually 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 automatically.

What Octopus Go actually offers

Go gives you a fixed cheap window. As of March 11, 2026, Octopus's public Go page shows a 00:30 to 05:30 window starting from 8.5p/kWh depending on your region. Outside that window, you move back to the tariff's normal daytime rate.

The window never changes. The rate is locked. You can configure your battery to charge during that window and discharge during the rest of the day — and that configuration stays correct indefinitely.

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, overnight slots can beat a fixed overnight tariff. On high-wind or high-solar days, some slots can even go negative — Octopus pays you to consume electricity.

On expensive days — cold snaps, low wind, high demand — Agile can also become expensive. As of March 11, 2026, Octopus's public Agile page highlights a range from negative prices up to around 67p/kWh, depending on region and market conditions.

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

The key variable: can your battery act automatically?

This is where most comparisons stop being useful.

On Go, your battery needs to do one thing: charge between 00:30 and 05:30. Any inverter with a time-of-use schedule can do this. You set it once and forget it.

On Agile, to realise the full benefit, 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 software that reads Agile prices and controls your inverter accordingly. Without it, you are likely just 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 captures the cheap overnight window reliably. The saving is predictable. There are no expensive surprises. 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 can become better than Go. Software that reads the day-ahead price schedule and dispatches the battery into the cheapest slots — including opportunistic negative-price windows — can add further 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 system that reads these prices and controls your inverter can:

• Select the cheapest 5–6 hours overnight for battery charging (which are often cheaper than Go's fixed rate)
• Flag any forecast negative-price slots the following afternoon or evening
• Protect the battery during expensive morning slots 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.

Which should you choose?

Choose Go if:

• Your inverter cannot be controlled externally or via API
• You want a predictable saving with no configuration overhead
• You do not have software coordinating your battery with tariff prices

Choose Agile if:

• Your battery can be dispatched automatically 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. Agile is the higher-ceiling option — but only if the battery can act on its prices. Without automation, the extra complexity of Agile adds risk without much additional reward.

Read how 1app.energy coordinates battery charging with Agile and Intelligent Go prices — or see which tariff fits your specific setup.