Octopus Intelligent Go: what really happens to your home battery
Intelligent Go is sold as a smart EV tariff. For some battery homes, it can create a conflict many people are not warned about — here is what is happening.
Octopus Intelligent Go is a well-known smart EV tariff in the UK. It can charge eligible EV sessions cheaply and adapt scheduling to the grid, which is why it appeals to many EV-only households.
For homes that also have a battery, it is a different story.
What Intelligent Go actually does
Intelligent Go works by scheduling a compatible EV or charger. Instead of you relying only on a fixed charge window, Octopus uses your vehicle or charger connection, your requested ready time, and grid price or carbon signals to create a smart charging schedule.
It then tells your compatible EV or charger when to charge, within the capabilities and permissions of that setup.
As of 24 April 2026, Octopus's public Intelligent Go page shows a core discounted window from 23:30 to 05:30, with extra smart charging sessions possible outside that window. The live unit rate and billing treatment can vary by region, tariff terms and account setup, so check the current Octopus quote and terms for your postcode.
This is the part that matters for battery owners.
The window is not fixed — and that matters
To understand why this matters, you first need to understand how a home battery behaves during its charging window.
When your battery is set to charge overnight (say, 00:30–05:30), it is in charging mode for that window. A battery cannot normally charge and discharge at the same time — it is either accepting energy or supplying it. In many common inverter configurations, other home loads such as heating, fridge and lights are supplied from the grid while the battery is charging. The exact behaviour depends on your inverter topology and settings.
Once the window closes, the battery switches to discharge mode. From 05:30 onwards, it supplies the home. This is also correct.
The conflict starts here.
Intelligent Go's dispatch window is dynamic. Standard Octopus Go typically charges your EV overnight within a fixed window that your battery's charge schedule is already covering. Intelligent Go may schedule additional sessions at 13:00 on a Tuesday, or 15:30 on a Thursday — hours after the overnight window has closed and your battery has been in discharge mode all day.
When that daytime session starts, Octopus sends a signal to your EV charger to begin drawing power. Your inverter never receives this signal. Your battery management software never receives it.
From the battery's perspective, a 7kW load just appeared on the house circuit. It is in discharge mode, it sees demand, and it supplies power. It has no way to know that the EV session may be eligible for discounted grid supply via Octopus if the battery would simply hold back.
What your battery does not know
Your battery communicates with your inverter. Your inverter communicates with your solar panels and the grid. In a typical uncoordinated setup, those systems do not have a live connection to Octopus's dispatch signals.
When Octopus tells a compatible EV or charger to start charging, that signal goes from Octopus's cloud to the EV or charger. Your inverter may never receive it. Your battery management software may never receive it.
So the battery may discharge. The EV session can get part of its energy from the grid and part from the battery, which had been storing solar energy for the evening. If the EV session was eligible for a discounted smart-slot rate, that benefit is diluted because your own battery is doing some of the work.
The real cost
A 10kWh battery significantly discharged during a daytime Intelligent Go session represents:
- Lost solar storage: solar energy you generated that morning, consumed by the car instead of being available for evening demand
- Missed export revenue: if you are on an export tariff, some of that stored energy may also have had export value later in the day
- Reduced evening buffer: your battery enters the peak-rate evening period with less charge than planned
In a worked example with three or four daytime sessions per week, the combined cost can become noticeable over a month in wasted solar storage and avoidable battery cycling.
Why this does not show up as an error
Neither Octopus nor your inverter manufacturer considers this a fault. Octopus's job is to schedule your EV charging cheaply. Your inverter's job is to manage your battery according to its configuration. Both are working correctly.
The gap is that there is no coordination layer between them. Octopus does not tell your battery to hold charge before a session. Your battery does not pause before discharging into what might be a scheduled EV load.
For supported homes where the customer enables it, this coordination layer is what 1app.energy can help provide — with two modes of operation:
Hold mode: When a smart charging session is detected and battery control is verified, the battery can hold its charge instead of supplying the EV load. The car can use the Octopus scheduled charging supply where it is eligible, and your battery stays available for the evening.
Charge mode: The battery holds and, when the tariff window, control capability and site conditions make it worthwhile, additionally charges. You may end the session with more stored energy than you started with — energy you can use in the evening, sell back on an export tariff, or use to reduce how much battery capacity you need to install in the first place.
Does switching back to Go fix it?
For some homes, yes. Standard Go's fixed window is predictable enough that a battery hold schedule can be set to match. If your daily schedule is consistent and you are not relying on daytime solar very heavily, Go can be the simpler choice.
The tradeoff: you lose the flexibility and carbon-aware scheduling that makes Intelligent Go attractive. And if you have solar, Go's fixed overnight window does not by itself help you capture and protect daytime solar generation.
A better answer for supported homes is whole-home coordination: keeping Intelligent Go's flexibility while helping the battery hold back during detected, eligible sessions where control evidence is verified, and potentially charging further when the tariff and site conditions justify it.
Related reading
- Why Octopus can drain a home battery during EV charging
- Octopus Go vs Intelligent Go: which is better with a home battery?
If you are on Intelligent Go and your battery is not where you expect it to be in the evenings, this may be part of the reason. See how 1app.energy can detect and respond to supported smart slots — or tell us your setup and we will review whether your home qualifies.
Relevant smart controls
These mode pages are the closest product-side follow-on from the issue explained in this article.
Home First
A simpler home-first mode. It prioritises running the home from your own solar and battery first, minimises grid dependence, and avoids optimiser-led battery export.
Autopilot
The best starting mode for most homes. Autopilot balances when to charge, hold, or export by weighing tariff value, later home coverage, forecast solar, and your protected minimum battery SoC so profitable export should not create later high-rate import.
Time-based Control
A simple target-based mode. Time-based Control charges the battery during your cheaper tariff periods until it reaches the level you choose, without optimiser-led export.
Does this sound like your home?
Your setup might already qualify.
Tell us which devices and tariff you are on. We review every request and invite in order of fit — not sign-up date.