Octopus Energy Battery Storage
Compare the Fox Mini Qube, Marstek Venus-E and AEG reserve range for Octopus tariffs. Charge at off-peak rates, use stored energy through a supported connection, and estimate your own saving — check the connection route for your model.
Compatible with Octopus Go, Agile, Flux, Intelligent Go & Cosy tariffs.
Why Pair a Battery with Octopus Energy?
Octopus Energy offers the UK's best time-of-use tariffs with cheap overnight electricity. A home battery lets you store that cheap energy and use it during expensive peak hours — turning your tariff into a money-saving machine.
Charge Overnight for Less
Intelligent Octopus Go is 8p/kWh and Octopus Go 8.5p/kWh overnight (Sept 2026). Your battery charges automatically during the cheap window.
Power Your Home All Day
Day rates on these tariffs are about 32–35p/kWh depending on region. Each stored kWh used in the day saves roughly 20p after charging losses.
Savings Grow Every Year
Tariff prices change, so recheck your estimate when rates move. Savings are never guaranteed.
Best Octopus Energy Tariff for Battery Storage
Every Octopus time-of-use tariff works with the plug-in home battery. Here's how they compare for battery savings.
| Tariff | Off-Peak Rate | Cheap Window | Best For | |
|---|---|---|---|---|
| Octopus Go | 8.5p/kWh | 00:30–05:30 (5 hrs) | Most households | Read guide → |
| Intelligent Octopus Go | 8p/kWh | 23:30–05:30 (6 hrs) | EV owners | Read guide → |
| Octopus Agile | Variable (often 0–10p) | Dynamic half-hourly | Flexible users | Read guide → |
| Octopus Flux | Variable | 02:00–05:00 (3 hrs) | Solar panel owners | Read guide → |
| Octopus Cosy | Variable | Multiple windows | Heat pump homes | Read guide → |
We don't show a fixed saving per tariff — it depends on the battery, the load it can serve, your usage and rates. Compare tariffs in the calculator. Full comparison guide →
Why the Plug-In Home Battery is Perfect for Octopus Energy
Plug & Play — No Electrician
Plugs into a standard 13A mains socket. Set up in 15 minutes. No wiring, no DNO approval, no MCS certification needed.
10-Year Warranty, 6,000+ Cycles
LFP (Lithium Iron Phosphate) chemistry delivers exceptional longevity. One of the longest warranties in the UK battery market.
AEG 4.8, 9.6 or AEG 14.4 kWh (pre-order)
Choose the right capacity for your home. From £1,499 for the AEG 4.8 kWh to £3,499 for the AEG 14.4 kWh. All prices include VAT.
Free UK Delivery
Free shipping to mainland UK. Register your interest to be notified when stock is available.
Octopus Energy Battery Savings by Size
How much can each plug-in home battery save on a typical Octopus time-of-use tariff?
Worked example: Octopus Go at 8.5p cheap / 32p peak, a typical 2,700 kWh/yr home, 90% usable capacity, 90% round-trip efficiency, 330 cycles a year. Stored energy is capped at what the home uses outside the cheap window. Your figure will differ — the calculator uses your own numbers.
Fox Mini Qube 2.11 kWh
Marstek Venus-E 5.12 kWh
Fox Mini Qube 10.55 kWh
How to Use a Battery with Octopus Energy
Choose your Octopus tariff
Sign up for Octopus Go, Agile, Flux, or Cosy. All offer cheap off-peak rates perfect for battery charging. Not sure which? Use our savings calculator or read our tariff comparison guide.
Register your interest
Choose Fox Mini Qube 2.11–10.55 kWh, Venus-E 5.12 kWh, or reserve an AEG 4.8–AEG 14.4 kWh system. Register your interest and we'll notify you when pre-orders re-open. Free UK delivery.
Plug in and set your schedule
Plug into any standard 13A mains socket. Install the CT clamp on your meter (5 mins). Set the charging schedule to match your Octopus off-peak window via the battery app.
Save automatically every day
The battery charges overnight at cheap rates and powers your home during expensive peak hours. Monitor your savings in the app. Most customers save £30–£60+ per month.
How much could you save?
Use our free calculator to see your savings in 30 seconds.
Octopus Energy Battery Storage FAQ
What is the best battery for Octopus Energy?
Match usable capacity and output to the load you can actually serve. The current range is Fox Mini Qube 2.11–10.55 kWh (AC or Hybrid) and Marstek Venus-E 5.12, 10.24 or 15.36 kWh; the calculator compares them.
Can I use a home battery with Octopus Energy?
Yes. Any AC-coupled battery works with Octopus Energy tariffs. The plug-in home battery plugs into a standard 13A socket and automatically charges during cheap off-peak windows, then discharges during expensive peak hours.
Which Octopus Energy tariff saves the most with a battery?
Savings depend on your current tariff rates, usage, usable capacity, losses and the load your chosen connection can serve. Use the calculator for a personal estimate.
How much can I save with an Octopus Energy battery?
Savings depend on your current tariff rates, usage, usable capacity, losses and the load your chosen connection can serve. Use the calculator for a personal estimate.
Do I need solar panels to use a battery with Octopus Energy?
No. All Octopus time-of-use tariffs provide cheap overnight electricity for battery charging. Solar panels are optional but add extra savings, especially on Octopus Flux which pays premium export rates.
Octopus Energy Battery Guides
Octopus Go Battery Storage →
Charge at 7.5p/kWh overnight.
Octopus Flux Battery Storage →
Best for solar panel owners.
Best Octopus Tariff for Batteries →
Full 2026 comparison guide.
Octopus Savings Calculator →
Live rates for your region.
Economy 7 Battery Storage →
Compare with Economy 7 rates.
Plug & Play Batteries →
Check the connection route for your chosen model.
Get Help Choosing Your Octopus Energy Battery
Tell us about your Octopus tariff and we'll recommend the best battery size for your home.
Got questions? Call us
+44 7782 218686Or tap the chat icon bottom-right — we'll get straight back to you.
Octopus tariffs at a glance
Octopus Go: a fixed cheap overnight window. The battery fills overnight and covers the evening.
Intelligent Octopus Go: a cheap overnight window for EV owners; the battery charges in the same window.
Agile: prices change every half hour. A battery charges in the cheapest slots and avoids the 4–7pm peak.
Flux: built for solar and batteries, with cheap night rates and higher peak export rates.
Cosy: designed for heat-pump homes, with several cheap windows a day.
Use the Octopus savings calculator with your own rates.