Agile prices and home batteries in Southern England
Region H is served by SSEN (Southern Electric). Over the last 12 months Agile averaged 21.7p per kWh here, the 7th cheapest of the 14 regions, and the gap between each day’s cheapest and dearest half-hour averaged 28.4p — the 13th widest in Great Britain. That gap is what a battery earns from.
Every half-hour of the year
The average day
All 48 half-hours
| Time | p/kWh | Time | p/kWh |
|---|---|---|---|
| 00:00 | 18.8p | 12:00 | 16.3p |
| 00:30 | 19.0p | 12:30 | 16.1p |
| 01:00 | 18.4p | 13:00 | 16.1p |
| 01:30 | 18.0p | 13:30 | 15.8p |
| 02:00 | 17.9p | 14:00 | 16.2p |
| 02:30 | 17.3p | 14:30 | 16.3p |
| 03:00 | 17.5p | 15:00 | 17.0p |
| 03:30 | 17.0p | 15:30 | 18.2p |
| 04:00 | 17.7p | 16:00 | 32.4p |
| 04:30 | 17.4p | 16:30 | 34.8p |
| 05:00 | 18.9p | 17:00 | 36.7p |
| 05:30 | 19.1p | 17:30 | 38.3p |
| 06:00 | 20.4p | 18:00 | 39.5p |
| 06:30 | 22.2p | 18:30 | 39.8p |
| 07:00 | 21.5p | 19:00 | 27.0p |
| 07:30 | 23.1p | 19:30 | 26.5p |
| 08:00 | 21.4p | 20:00 | 25.8p |
| 08:30 | 21.5p | 20:30 | 24.8p |
| 09:00 | 20.4p | 21:00 | 24.8p |
| 09:30 | 19.4p | 21:30 | 23.0p |
| 10:00 | 18.5p | 22:00 | 22.2p |
| 10:30 | 17.6p | 22:30 | 20.1p |
| 11:00 | 17.0p | 23:00 | 20.4p |
| 11:30 | 16.4p | 23:30 | 19.2p |
Prices were lowest in Apr (average 16.3p) and highest in Sep (27.6p). The single cheapest half-hour was -11.7p and the dearest 90.6p.
Month by month
| Month | Average Agile price |
|---|---|
| Jan | 22.5p |
| Feb | 19.3p |
| Mar | 22.5p |
| Apr | 16.3p |
| May | 21.2p |
| Jun | 20p |
| Jul | 21.6p |
| Aug | 26.5p |
| Sep | 27.6p |
| Oct | 26p |
| Nov | 18.8p |
| Dec | 18.2p |
Selling back: Agile Outgoing
Agile Outgoing paid an average of 11.3p per kWh in Southern England over the same year, and 19.2p between 16:00 and 19:00. It pays for exports from MCS-certified solar, not from a battery and not from plug-in solar.
Other tariffs in Southern England
| Tariff | Standing charge, p/day | Unit rates, p/kWh |
|---|---|---|
| Flexible Octopus | 48.62 | 27.8p |
| Agile Octopus | 62.22 | average 21.7p |
| Octopus Go | 49.85 | 9.9p / 36.6p |
| Intelligent Octopus Go | 49.85 | 6.9p / 38.2p |
| Cosy Octopus | 49.85 | 14.8p / 30.1p / 45.1p |
| Octopus Flux | 49.85 | 16.9p / 28p / 39.1p |
Octopus public API, fetched 25 October 2026; import prices with 5% VAT.
Plug-in solar in Southern England
For Southampton, PVGIS (European Commission JRC) gives about 612 kWh a year from 800 W of upright south-facing balcony panels and 850 kWh angled at 35°. Check the payback and get permission letters.
Frequently asked questions
When is electricity cheapest on Agile in Southern England?
Over 25 October 2025 to 25 October 2026, the cheapest three hours on an average day in region H were 12:00–15:00, averaging 16.1p per kWh, against 36.9p from 16:00 to 19:00. 3% of half-hours were below zero.
Is a home battery worth it on Agile in Southern England?
In Fortyeight’s model a typical 2,500 kWh home in Southern England saves about £218 a year with a 10 kWh battery on Agile, so the battery would need to cost under £1,983 to pay back in 10 years. Bigger or more evening-heavy users save more; run your own data to check.
How much would an 800 W plug-in solar kit make in Southern England?
PVGIS data for Southampton give about 612 kWh a year for 800 W of upright, south-facing balcony panels and 850 kWh angled at 35°, before shading.
Tell us what to build next
Everything on Fortyeight is free while it is in beta. Leave your email and pick the feature you would pay for; we will write when it ships.