Octopus's prices in Southern (Southampton, Oxford, Reading), and which tariff wins for six typical homes.
With an EV: Intelligent Octopus Go (£1,147 a year for a typical EV home). With solar, a battery and an EV: Intelligent Octopus Go (−£18). No solar or EV: Agile Octopus.
| Your home | Best tariff | A year | Saving vs Flexible |
|---|---|---|---|
| No solar, no EV | Agile Octopus | £943 | £99 |
| EV, no solar | Intelligent Octopus Go | £1,147 | £534 |
| Solar only (4 kWp) | Agile Octopus | £379 | £20 |
| Solar + 13.5 kWh battery | Octopus Flux | −£102 | £391 |
| Solar + battery + EV | Intelligent Octopus Go | −£18 | £805 |
| Heat pump + solar | Agile Octopus | £1,143 | £199 |
Battery homes allow the battery to sell spare charge at the evening peak. Intelligent Go and Go need an EV; Flux needs solar and a battery; Cosy needs a heat pump.
| Tariff | Price per kWh | When |
|---|---|---|
| Flexible Octopus | 27.9p | All day |
| Intelligent Octopus Go | 6.6p / 28.9p | 11:30pm–5:30am / rest of day |
| Octopus Go | 8.2p / 29.8p | 12:30–5:30am / rest of day |
| Agile Octopus (last 12 months) | 21.0p | Average; about 16.9p overnight, 36.0p 4–7pm |
| Octopus Flux | 14.6p / 24.3p / 34.1p | 2–5am / day / 4–7pm; export up to 29.0p |
| Cosy Octopus | 12.5p / 38.2p | Three cheap spells / 4–7pm |
| Outgoing Octopus (export) | 12.0p | Every unit you export |
Standing charge on Flexible: 46.3p a day. Agile prices change every half hour; the figures shown are averages over October 2025 to September 2026.
We run a typical home through a year, half hour by half hour, on each tariff using Octopus's published prices for the region. The example home uses 3,100 kWh a year before any EV or heat pump; the EV does 8,000 miles at 3.5 miles per kWh and charges in the cheapest slots; solar is 4 kWp (about 3,600 kWh a year); the battery holds 13.5 kWh and charges or discharges at up to 5 kW. Agile uses the average price for each half hour of each month from October 2025 to September 2026, so a cold, still winter can cost more. Each tariff is paired with whichever export tariff pays more. Figures are electricity only, including the standing charge, and negative numbers mean Octopus pays you.
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