The best time-of-use tariff for your Juicy battery (2026)
⚡ The right tariff is where most of your saving happens - without one, a home battery saves you very little
💷 Agile Octopus is the strongest option for most Juicy customers without an EV in a normal market—but overnight rates are currently elevated due to wholesale price volatility; simpler fixed alternatives may offer more predictable savings right now
🚗 If you have an EV, Intelligent Octopus Go (8p/kWh) and E.ON Next Drive (7.5p/kWh) are the best currently available EV options. So EV is temporarily suspended to new customers.
📉 The standard variable rate is 27.7p/kWh (Ofgem price cap, Q1 2026) - falling to 24.67p/kWh from 1 April under the Q2 2026 cap. A time-of-use tariff cuts what you pay to charge your battery to a fraction of that
🤖 Juicy's software handles everything automatically - it reads your tariff daily, charges your battery overnight, and discharges during peak hours without any input from you
🔄 Switching tariff is free, quick, and Juicy will help guide you - it takes a few minutes
⚠️ Market conditions — please read first: Global events are causing wholesale energy prices to rise unexpectedly, and many energy suppliers are currently updating their tariff ranges in response. This means the number of available time-of-use tariffs is more limited than usual, and some tariffs listed in this guide may have changed or temporarily closed to new customers. Always check directly with the supplier for the latest available tariffs and rates before switching. This guide was last updated on 9 March 2026.
Rates note: Tariff rates listed are indicative as of 9 March 2026. The Q1 2026 Ofgem price cap electricity unit rate is 27.7p/kWh (applicable until 31 March 2026). From 1 April 2026, the Q2 2026 cap takes effect, reducing the standard variable rate to 24.67p/kWh. Rates may differ from those shown so always confirm with the supplier before switching.
Here's how time-of-use tariffs work, which ones are available in the UK right now, and which will save you the most money with a Juicy battery.
Why does your tariff matter so much?
Electricity doesn't cost the same all day. Prices spike in the evening when millions of households cook, heat, and watch TV at the same time. They fall overnight when demand drops and renewable generation, wind in particular, tends to be at its highest.
On a standard flat-rate tariff, none of that variation reaches you. You pay an average rate regardless of when you use electricity. A time-of-use (TOU) tariff passes the price differences directly on to you, and a home battery exploits them automatically.
Your Juicy battery charges when electricity is at its cheapest, typically overnight, and powers your home during peak hours when the grid rate is highest. The savings on every unit of electricity shifted comes from the gap between those two prices.
On the best available off-peak rate, around 7.5p/kWh on E.ON Next Drive Smart, you're paying roughly a quarter of the 27.7p/kWh you'd otherwise spend at peak. Across 8–10kWh of electricity shifted per day, that gap adds up to hundreds of pounds every year.
Which tariff saves you the most?
⚠️ Important: EV requirement. The majority of the cheapest time-of-use tariffs require you to own an electric vehicle (and in some cases a compatible home charger) to be eligible. This is noted clearly in the table and each tariff section below. For Juicy customers without an EV, the options are narrower but the market is constantly evolving and we expect to see more options in the coming months.
⚠️ Availability and rate updates (9 March 2026). So EV is temporarily suspended to new customers. Intelligent Octopus Go has moved to 8p/kWh (from 7p). E.ON Next Drive Smart is 8.5p/kWh (updated 5 March 2026). Agile Octopus overnight rates are currently elevated (~22–25p/kWh) due to global wholesale price volatility. All other tariffs listed remain open to new customers.
The table below shows how the main time-of-use tariffs available in the UK compare for a standalone home battery, based on a typical household using 8–10kWh per day with a 10kWh Juicy battery.
| Tariff | Off-peak rate | Off-peak window | EV required? | Available? | Est. annual saving |
|---|---|---|---|---|---|
| So EV | 6.5p/kWh | 00:00–05:00 | ✅ Yes | 🔴 Suspended | £600–£900 |
| Intelligent Octopus Go | 8p/kWh (updated Mar 2026) | 23:30–05:30 (min. 6 hrs) | ✅ Yes (compatible EV or smart charger) | 🟢 Open | £500–£800 |
| E.ON Next Drive (standard) | 7.5p/kWh | 00:00–06:00 | ✅ Yes (any EV)* | 🟢 Open | £560–£880 |
| E.ON Next Drive Smart | 8.5p/kWh (updated 5 Mar 2026) | 00:00–06:00 | ✅ Yes (compatible EV + smart charger) | 🟢 Open | £500–£800 |
| Octopus Go | 8.5p/kWh | 00:30–05:30 | ✅ Yes (any EV) | 🟢 Open | £480–£780 |
| Scottish Power EV Saver | 9.5p/kWh | 00:00–05:00 | ✅ Yes (EV + home charger) | 🟢 Open | £480–£780 |
| Agile Octopus ⭐ | ~10–25p avg. (elevated, Mar 2026; typically 5–15p in calmer markets) | Dynamic (daily) | ❌ No | 🟢 Open | £200–£900+ (highly variable) |
| British Gas Charge Power | ~13–14p/kWh Q1; ~12p from April | 00:00–05:00 | ❌ No (battery only) | 🟢 Open | £200–£400 |
| Economy 7 | ~14.5p/kWh avg (Q1 2026) | 23:30–06:30 (7 hrs) | ❌ No | 🟢 Open | £200–£400 |
| EDF FreePhase Dynamic | ~15–16p/kWh | 23:00–06:00 | ❌ No | 🟢 Open | £350–£600 |
| EDF FreePhase Static | ~18p/kWh | 23:00–06:00 | ❌ No | 🟢 Open | £250–£450 |
| So Unique | Personalised | Personalised | ❌ No | 🟡 Waitlist | Up to £200 vs SVT |
| Standard variable | 27.7p/kWh Q1 2026 / 24.67p from 1 April | N/A | — | 🟢 Open | Minimal |
Please note that prices displayed in the tables below are representative, since they vary regionally. Check the supplier's website to get the latest and accurate pricing for your location.
The tariffs explained
Agile Octopus has the potential to deliver the highest savings, but overnight rates are currently elevated ⭐
🟢 Open to new customers
Agile Octopus tracks the wholesale electricity market, updating its price every 30 minutes. Rather than a fixed overnight window, the rates you pay each day reflect the actual cost of generating and delivering electricity at that moment. Tomorrow's prices are published around 4–8pm each day.
What makes it powerful: On nights with high wind generation and low demand, overnight rates can fall well below 10p/kWh, and occasionally into negative pricing, where Octopus actually pays you to use electricity. Juicy's software reads the next day's prices each afternoon and automatically schedules your battery to charge in the cheapest available slots. You don't need to do anything.
What makes it complex: Unlike every other tariff in this guide, Agile has no fixed overnight rate. In current market conditions (March 2026), overnight rates are averaging approximately 22–25p/kWh due to elevated wholesale gas prices driven by global events. This is significantly higher than in calmer market periods, when overnight averages typically run around 11–15p/kWh. The 4–8pm peak period can also see rates of 30–60p/kWh (capped at 100p). Because your battery is charged overnight and powers your home during those peak hours, the high daytime peak doesn't affect you directly, but the elevated overnight rate reduces the saving margin while wholesale prices remain high.
Our honest take: Agile delivers the best results for battery owners willing to trust Juicy's software to manage it, particularly when wholesale prices are low. In the current market environment, however, fixed-rate alternatives like British Gas Charge Power (~12–14p/kWh) may offer better overnight rates than Agile on many nights. If you want simplicity and a predictable overnight rate right now, Charge Power or EDF FreePhase are easier to understand and budget around. If you're comfortable with variability and expect wholesale prices to normalise, Agile's long-term ceiling remains the highest of any no-EV tariff.
| Provider | Octopus Energy |
| Off-peak rate | Varies. Currently averaging ~22–25p/kWh overnight (March 2026, elevated market); typically 5–15p/kWh in calmer conditions; can go negative |
| Peak rate | 30–60p/kWh between 4–8pm (capped at 100p) |
| Price type | Dynamic. Updated every 30 minutes, published daily at ~4–8pm |
| Smart meter required | Yes |
| EV required | ❌ No |
| Availability | 🟢 Open to new customers |
| Estimated annual saving with Juicy | £200–£900+ (highly variable; lower end reflects current elevated overnight rates) |
| Exit fee | No (30-day wait before rejoining) |
British Gas Charge Power — the dedicated battery tariff, no EV needed
🟢 Open to new customers
Charge Power is British Gas's tariff specifically designed for home battery owners. It offers a 50% discount on your underlying fixed tariff unit rate between midnight and 5am every night. At Q1 2026 price cap rates, this works out at approximately ~13–14p/kWh. From 1 April 2026, as the Q2 2026 price cap takes effect and the SVT unit rate falls to 24.67p/kWh, the off-peak rate will drop to approximately ~12p/kWh, a customer-friendly reduction. Despite being listed alongside British Gas's EV tariffs, Charge Power requires only a home battery and a smart meter, no electric vehicle is needed.
For standalone battery customers without an EV, this is the simplest fixed-rate option available. The overnight rate is predictable: you always know roughly what you'll pay to charge your battery, and there's no need to understand wholesale electricity markets. In the current Agile market environment, Charge Power's fixed overnight rate is also competitive compared to recent Agile overnight averages.
To sign up: join British Gas on their standard variable tariff first if you're not already a customer, then switch to Charge Power through your online account. Note that exit fees apply if you subsequently switch to another supplier.
| Provider | British Gas |
| Off-peak rate | ~13–14p/kWh Q1 2026; ~12p/kWh from 1 April (50% discount on fixed tariff rate, tracks SVT) |
| Off-peak window | 00:00–05:00 |
| Standard rate | ~27–30p/kWh (Q1 2026); ~24–26p from 1 April |
| Price type | Fixed (rate reviewed with underlying tariff, typically quarterly) |
| Smart meter required | Yes |
| EV required | ❌ No — home battery only required |
| Availability | 🟢 Open to new customers |
| Estimated annual saving with Juicy | £200–£400 |
| Exit fee | Yes — applies if switching to another supplier |
EDF FreePhase Dynamic — simpler than Agile, still no EV needed
🟢 Open to new customers
FreePhase Dynamic is EDF's take on dynamic pricing. Rather than 48 separate half-hourly prices like Agile, it uses three daily rate bands; Green (night, ~15–16p/kWh), Amber (off-peak day), and Red (peak, 4–7pm), with rates updated each day based on the same wholesale market data. Tomorrow's prices are published each afternoon, and when wholesale prices go negative, the Green rate drops to zero, free electricity.
It's a gentler introduction to dynamic pricing than Agile: three prices to track rather than 48, and with Juicy handling the scheduling automatically, customers don't need to monitor it themselves. The overnight Green rate is higher than Agile's best nights but more consistent, and in the current elevated wholesale environment, it is cheaper than Agile on most nights.
How to access it: FreePhase is open to any household with a smart meter capable of half-hourly reads and a direct debit. There is no waitlist. New customers need to join EDF on its standard variable tariff first, then switch to FreePhase through their online account, typically within a few days of supply going live.
| Provider | EDF Energy |
| Green (night) rate | ~15–16p/kWh (23:00–06:00) |
| Amber (off-peak) rate | ~19–22p/kWh |
| Red (peak) rate | ~30–40p/kWh (4–7pm) |
| Price type | Dynamic — 3 bands updated daily |
| Unit rate cap | 75p/kWh |
| Smart meter required | Yes (half-hourly reads) |
| EV required | ❌ No |
| Availability | 🟢 Open to new customers |
| How to access | Switch to EDF SVT first, then switch to FreePhase in your account |
| Estimated annual saving with Juicy | £350–£600 |
| Exit fee | No |
EDF FreePhase Static — predictable pricing, same access, lower saving
🟢 Open to new customers
FreePhase Static uses the same three-band structure as FreePhase Dynamic; Green, Amber, Red, but with rates fixed for 12 months. If you want to know exactly what you'll pay to charge your battery each night without any daily variation, this is the more stable choice. The Green (night) rate sits at around 18p/kWh. Access works the same way as FreePhase Dynamic by joining EDF SVT first, then switching across.
| Provider | EDF Energy |
| Green (night) rate | ~18p/kWh (23:00–06:00) |
| Amber (off-peak) rate | ~23p/kWh |
| Red (peak) rate | ~35p/kWh (4–7pm) |
| Price type | Fixed (12 months) |
| Smart meter required | Yes (half-hourly reads) |
| EV required | ❌ No |
| Availability | 🟢 Open to new customers |
| How to access | Switch to EDF SVT first, then switch to FreePhase in your account |
| Estimated annual saving with Juicy | £250–£450 |
| Exit fee | No |
So Unique — personalised TOU pricing, currently on a waiting list
🟡 Waitlist only, not yet widely available
So Unique is So Energy's personalised time-of-use tariff. It analyses your smart meter data and generates Peak, Off-peak, and Super Off-peak rates based on how your household actually uses electricity. The concept is genuinely novel and the logic is sound. The honest caveat is that it's currently in early access (waiting list only), and savings estimates are less reliable than fixed-rate alternatives. So Energy's own modelling suggests up to £200 per year versus its standard variable tariff. One to watch rather than switch to immediately.
| Provider | So Energy |
| Rate structure | Personalised Peak, Off-peak, Super Off-peak |
| EV required | ❌ No |
| Availability | 🟡 Waiting list — not yet widely available |
| Estimated annual saving with Juicy | Up to £200 vs SVT |
| Exit fee | No |
For customers with an EV
So EV — 6.5p/kWh, currently suspended to new customers
🔴 Temporarily suspended to new customers
So EV (when available) offers 6.5p/kWh between midnight and 5am for customers with an EV and home charger, the cheapest fixed off-peak rate in the market when available. However, So Energy has temporarily withdrawn the tariff from sale due to rising wholesale energy prices caused by the Middle East situation. Existing So EV customers are not affected. The tariff will likely return once market conditions stabilise; we'll update this guide when it does. Check So Energy's website for the latest availability.
| Provider | So Energy |
| Off-peak rate | 6.5p/kWh |
| Off-peak window | 00:00–05:00 |
| Standard rate | ~27–28p/kWh |
| Price type | Fixed (12 months) |
| Smart meter required | Yes |
| EV required | ✅ Yes — EV and home charger required |
| Availability | 🔴 Temporarily suspended to new customers (March 2026) |
| Estimated annual saving with Juicy | £600–£900 (when available) |
| Exit fee | No |
Intelligent Octopus Go — best currently available option for compatible EV owners
🟢 Open to new customers
Octopus's own website now shows the smart charging rate for Intelligent Octopus Go at 8p/kWh, updated in March 2026 (previously 7p). The tariff provides a minimum 6-hour window from 11:30pm to 5:30am, plus additional cheap slots on high-renewable nights. Smart scheduling via the Octopus app means you set a target charge level and ready-by time — it handles the rest. Requires a compatible EV or smart charger.
At 8p, this is the best currently available fixed-rate EV tariff for compatible EV owners, ahead of E.ON Next Drive Smart (8.5p) and Octopus Go (8.5p). The rate is reviewed periodically; a fixed 6-month version may also be available — confirm with Octopus at sign-up.
| Provider | Octopus Energy |
| Off-peak rate | 8p/kWh (updated March 2026; was 7p) |
| Off-peak window | 23:30–05:30 (minimum 6 hours) |
| Standard rate | ~32p/kWh |
| Price type | Variable (reviewed periodically); fixed 6-month version also available |
| Smart meter required | Yes |
| EV required | ✅ Yes — compatible EV or smart charger required |
| Availability | 🟢 Open to new customers |
| Estimated annual saving with Juicy | £500–£800 |
| Exit fee | No |
E.ON Next Drive Smart — updated to 8.5p/kWh (5 March 2026)
🟢 Open to new customers
E.ON Next Drive Smart's off-peak rate was updated to 8.5p/kWh on 5 March 2026 (previously 6.5p). The rate applies overnight from midnight to 6am, and during any scheduled smart-charging session via the E.ON Next Home app — at any time of day — the off-peak rate applies to your whole home. Requires a compatible electric vehicle and smart charger connected to the E.ON Next Home app.
| Provider | E.ON Next |
| Off-peak rate | 8.5p/kWh (updated 5 March 2026; was 6.5p) |
| Off-peak window | 00:00–06:00 (plus smart-charging sessions) |
| Standard rate | ~30.9p/kWh |
| Price type | Fixed (12 months) |
| Smart meter required | Yes |
| EV required | ✅ Yes — compatible EV and smart charger required |
| Availability | 🟢 Open to new customers |
| Estimated annual saving with Juicy | £500–£800 |
| Exit fee | No |
E.ON Next Drive (standard) — for any EV owner
🟢 Open to new customers
7.5p/kWh overnight from midnight to 6am. Available to any EV owner without needing a specific smart charger or compatible model. With So EV suspended, this is currently the second-cheapest available fixed-rate overnight tariff for EV owners.
| Provider | E.ON Next |
| Off-peak rate | 7.5p/kWh |
| Off-peak window | 00:00–06:00 |
| Standard rate | ~29.9p/kWh |
| Price type | Fixed (12 months) |
| Smart meter required | Yes |
| EV required | ✅ Yes — any EV; no specific smart charger required |
| Availability | 🟢 Open to new customers |
| Estimated annual saving with Juicy | £560–£880 |
| Exit fee | No |
Scottish Power EV Saver — for Scottish Power customers with an EV
🟢 Open to new customers
9.5p/kWh for existing Scottish Power customers who own an EV and home charger. No exit fees, 100% renewable electricity. You need to be a Scottish Power customer already (or join their SVT first) and have a single-rate smart meter with half-hourly readings.
| Provider | Scottish Power |
| Off-peak rate | 9.5p/kWh |
| Off-peak window | 00:00–05:00 |
| Standard rate | ~31p/kWh |
| Price type | Fixed |
| Smart meter required | Yes (single-rate, half-hourly) |
| EV required | ✅ Yes — EV and home charger; must be a Scottish Power customer |
| Availability | 🟢 Open to new customers |
| Estimated annual saving with Juicy | £480–£780 |
| Exit fee | No |
Octopus Go — for any EV owner, no smart charger needed
🟢 Open to new customers
8.5p/kWh from 00:30 to 05:30, available to anyone with an EV and charger regardless of make or model. The most accessible Octopus EV tariff. If you have a compatible EV, Intelligent Octopus Go offers a lower rate at 8p and should be preferred.
| Provider | Octopus Energy |
| Off-peak rate | 8.5p/kWh |
| Off-peak window | 00:30–05:30 |
| Standard rate | ~30.5p/kWh |
| Price type | Fixed, reviewed quarterly |
| Smart meter required | Yes |
| EV required | ✅ Yes — any EV model, no smart charger needed |
| Availability | 🟢 Open to new customers |
| Estimated annual saving with Juicy | £480–£780 |
| Exit fee | No |
Standard variable — not worth it for a battery
A standard variable tariff charges you the same unit rate at all hours of the day, currently around 27.7p/kWh under the Ofgem price cap for Q1 2026 (falling to ~24.67p from 1 April under the Q2 Cap). Without a price difference between overnight and peak periods, there's no gap for your battery to exploit. The savings would be minimal and unlikely to justify the investment.
If you're currently on a standard variable tariff, Juicy will recommend the right TOU tariff for your home and help you switch before installation.
How does Juicy manage your tariff for you?
Once your battery is installed and set up, Juicy's software handles everything. There's no need to monitor prices, set timers, or adjust settings.
For fixed-window tariffs like Octopus Go, the software knows exactly when electricity is cheap each night and schedules your battery to charge in that window. For dynamic tariffs like Agile, it reads the next day's prices each afternoon and identifies the cheapest half-hour slots for charging, adapting every single day to whatever the market is doing.
During the day and evening, your home draws from the battery instead of the grid during peak periods, avoiding the expensive rate entirely. When the battery is depleted, it switches back to grid power seamlessly, you won't notice a thing.
If tariff rates change, quarterly, annually, or daily depending on which tariff you're on, the software updates automatically. And if a better tariff comes to market, Juicy will flag it.
Do you have to switch tariff to get a Juicy battery?
You don't have to, but the honest answer is that you'll want to. On a standard flat-rate tariff, a battery saves you very little. The entire financial case rests on exploiting the price difference between cheap overnight electricity and expensive peak electricity. That difference only exists on a time-of-use tariff.
If you're already on a suitable time-of-use tariff, your Juicy battery will start working as soon as it's installed. If you're on another tariff where you're not getting the best savings from your battery, Juicy will recommend the right option for your home and recommend that you switch before installation. It's free, takes a few minutes, and is where most of the saving comes from.
Summary
The right time-of-use tariff makes a significant difference to what a home battery saves you each year.
Without an EV, the options are narrower than the market headlines suggest. Agile Octopus offers the best potential savings in a normal market but overnight rates are currently elevated (~22–25p/kWh as of March 2026). Juicy's software manages the complexity, but the saving margin is reduced while conditions remain turbulent. British Gas Charge Power is the simplest fixed-rate choice for battery-only customers: no EV needed, predictable overnight rate (~13–14p now; ~12p from April), and purpose-built for home batteries, and in the current Agile environment, it is very likely cheaper per overnight kWh than Agile. EDF FreePhase Dynamic, at ~15–16p/kWh overnight, costs a little more than Charge Power on most nights but has no exit fees and introduces dynamic pricing.
With an EV, So EV (6.5p) remains the cheapest rate in the market but is temporarily suspended to new customers due to global wholesale price volatility. The best currently available option for compatible EV owners is Intelligent Octopus Go at 8p/kWh, ahead of E.ON Next Drive (standard) at 7.5p/kWh (which requires no specific smart charger). E.ON Next Drive Smart and Octopus Go are both at 8.5p, with Drive Smart adding whole-home smart charging coverage. Scottish Power EV Saver at 9.5p suits existing Scottish Power customers.
Whichever tariff you end up on, Juicy's software manages the charging and discharging schedule automatically. The saving happens without you having to think about it.
Sources
- Ofgem, Changes to energy price cap between 1 January and 31 March 2026, December 2025. SVT rate 27.69p/kWh; Economy 7 average night rate 14.53p/kWh. https://www.ofgem.gov.uk/news/changes-energy-price-cap-between-1-january-and-31-march-2026
- Ofgem, Changes to energy price cap between 1 April and 30 June 2026, February 2026. SVT rate 24.67p/kWh. https://www.ofgem.gov.uk/news/changes-energy-price-cap-between-1-april-and-30-june-2026
- Octopus Energy, Intelligent Octopus Go, March 2026. Smart charging rate updated to 8p/kWh. https://octopus.energy/smart/intelligent-octopus-go/
- Energy Stats UK, Intelligent Octopus Go rates, setup guide and FAQ, March 2026. https://energy-stats.uk/intelligent-octopus-go/
- E.ON Next, Next Drive Smart tariff page, 5 March 2026. Off-peak rate updated to 8.5p/kWh. https://www.eonnext.com/tariffs/next-drive/smart
- E.ON Next, Next Drive tariff page, March 2026. Standard Next Drive 7.5p/kWh. https://www.eonnext.com/tariffs/next-drive
- British Gas, Charge Power battery tariff page, March 2026. Confirms home battery only required; 50% discount on unit rate midnight–5am. https://www.britishgas.co.uk/energy/gas-and-electricity/home-battery-tariff.html
- EDF Energy, FreePhase tariff page, accessed March 2026. https://www.edfenergy.com/gas-and-electricity/freephase
- MoneySavingExpert Forum, EDF FreePhase Dynamic thread, 2025. https://forums.moneysavingexpert.com/discussion/6640111/edf-freephase-dynamic-tariff
- Scottish Power, EV Saver tariff, accessed March 2026. Off-peak rate 9.5p/kWh. https://www.scottishpower.co.uk/electric-vehicle/tou-tariff
- So Energy, So EV tariff page, March 2026. Confirms temporary suspension: "Due to the current situation in the Middle East, energy prices have risen sharply. We're temporarily removing the So EV tariff from sale." https://www.so.energy/ev/ev-home-charging
- Octopus Energy, Tracker & Agile, the Iran war and rising wholesale prices: stick or fix?, March 2026. https://octopus.energy/blog/tracker-agile-the-iran-war-and-rising-wholesale-prices-what-you-need-to-know/
- agileprices.co.uk, live Agile overnight rate tracking, March 2026. Average off-peak rate ~22–25p/kWh.
- British Gas, Economy 7 guide, January 2026. Average E7 night rate 14.53p/kWh under Q1 2026 price cap. https://www.britishgas.co.uk/energy/guides/economy-7-meters-explained.html
- Vimma Energy, Tariff Leaderboard, December 2025. https://vimma.energy/tariffs
Savings estimates are based on a typical household shifting 8–10kWh per day from peak to off-peak on a 10kWh Juicy battery. Actual savings depend on your consumption profile, tariff, region, and battery configuration. SVT rates are indicative: 27.7p/kWh for Q1 2026 (to 31 March); 24.67p/kWh for Q2 2026 (from 1 April). Agile Octopus rates are variable and shown as indicative averages; overnight averages are currently elevated at ~22–25p/kWh due to market conditions as of March 2026. Economy 7 night rate shown is the Ofgem Q1 2026 price cap average across all regions — actual rates vary by supplier and region, and will fall from 1 April. Payback periods are calculated using mid-range annual saving figures at the £3,499 Buy price.