Octopus Go vs Intelligent Go: which is actually better if you have a home battery?

Octopus Go and Intelligent Go are both designed to make EV charging cheap. At a headline level, they look similar: a low overnight rate, a standard daytime rate, and a compatible charger requirement. For most EV-only households they are broadly equivalent, with Intelligent Go offering slightly more flexibility.

For homes with a battery, the choice is more nuanced — and getting it wrong can cost more than the tariff saves.

The key difference

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

The window is fixed. Every night, at the same time, the cheap rate starts. Your EV charger, your battery management system, and your inverter can all be configured around this predictable schedule.

Octopus Intelligent Go offers a dynamic dispatch window. As of March 11, 2026, Octopus's public page shows a core discounted window from 23:30 to 05:30, and Octopus can add extra smart charging sessions outside that window depending on your setup.

This is done via a direct connection between Octopus and your smart charger (Ohme, Indra, Zappi, Wallbox, and others). Octopus controls the session; you just plug in.

Why fixed windows are friendlier to batteries

A battery management system needs to know when to hold charge and when to discharge. If you tell it to hold charge between 00:30 and 05:30, it will do that — it will wait for the cheap window to close before resuming its normal discharge behaviour.

This works well with Go because the window never changes. The battery hold schedule you set on day one is still correct six months later.

With Intelligent Go, the window changes every night and can include daytime sessions. A battery hold schedule set for 00:30–05:30 offers no protection during a 14:00 session dispatched on a sunny Wednesday when the grid is clean. The battery discharges into the EV load as normal, consuming solar storage you collected that morning.

Some inverter manufacturers offer partial integration — a "solar divert" mode, or an Agile tariff integration — but none of the major UK home battery systems (Solis, GivEnergy, SolarEdge, Enphase) have a live integration with Octopus Intelligent Go dispatch signals.

An illustrative comparison for battery homes

For a home with a 10kWh battery and 4kW solar, here is a worked example rather than a universal result:

On Octopus Go:

• Battery charges reliably from 00:30–05:30 at cheap rate
• No unexpected daytime discharge into EV sessions
• Solar storage reaches the evening most days
• Predictable: what you configured is what you get

On Intelligent Go (uncoordinated):

• Battery charges overnight as scheduled
• 2–4 daytime sessions per week consume 4–8kWh of solar storage each time
• Evening battery level is lower than expected 3–4 days per week
• In that worked example, the lost solar value can quickly become noticeable over a month

On Intelligent Go (with whole-home coordination):

• Battery protected during all dispatched sessions regardless of timing
• Solar storage preserved for evening demand
• Cheap rate benefit fully realised: you import cheaply from the grid, not from your own battery
• Net result: Intelligent Go with coordination can outperform Go, but only when the battery is actually coordinated with EV dispatches

Which should you choose?

Choose Go if:

• You do not have a battery, or your battery management system cannot be adjusted for dynamic windows
• Your EV charging is predictable and overnight-only
• You prefer simplicity over optimisation

Choose Intelligent Go if:

• You have a compatible smart charger
• You have (or plan to have) software coordination between the tariff and your battery
• You want carbon-aware scheduling in addition to price-aware scheduling
• You have solar and want to capture cheap grid periods beyond the overnight window

The honest answer is that Intelligent Go is the higher-ceiling tariff for some complex homes — but it requires coordination to realise that benefit. Without it, the dynamic dispatch can actively work against a battery home, consuming the solar storage the battery was installed to protect.

What about Flux?

Octopus Flux is worth considering for homes that are primarily export-focused — homes with large solar arrays and batteries that are generating significant export revenue. Flux offers structured import and export windows, which works best when you can reliably supply your own demand from solar and battery and sell surplus back.

For homes where the primary goal is reducing import cost rather than maximising export revenue, Go or Intelligent Go will typically perform better.

What about Agile?

Octopus Agile offers half-hourly pricing that tracks the wholesale market. On some very cheap days, including occasional negative-price periods, it can outperform Go. But Agile pricing is volatile and can also become expensive during high-demand periods.

For battery homes, Agile is most powerful when the battery can be charged automatically during the cheapest half-hours and held for expensive periods. This requires either an inverter with Agile integration (some GivEnergy and SolarEdge systems support this natively) or a coordination system that reads the day-ahead prices and schedules charging accordingly.

If you are deciding between these tariffs and want to understand how each would interact with your specific battery and inverter setup, read how 1app.energy handles both — or browse our tariff comparison pages for more detail.