Agile prices and home batteries in South West England
Region L is served by National Grid (South West). Over the last 12 months Agile averaged 23.7p per kWh here, the 13th cheapest of the 14 regions, and the gap between each day’s cheapest and dearest half-hour averaged 28.9p — the 8th 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 | 20.7p | 12:00 | 18.0p |
| 00:30 | 21.0p | 12:30 | 17.8p |
| 01:00 | 20.3p | 13:00 | 17.9p |
| 01:30 | 19.9p | 13:30 | 17.5p |
| 02:00 | 19.8p | 14:00 | 17.9p |
| 02:30 | 19.2p | 14:30 | 18.0p |
| 03:00 | 19.3p | 15:00 | 18.8p |
| 03:30 | 18.8p | 15:30 | 20.1p |
| 04:00 | 19.6p | 16:00 | 33.4p |
| 04:30 | 19.3p | 16:30 | 36.1p |
| 05:00 | 20.9p | 17:00 | 38.2p |
| 05:30 | 21.1p | 17:30 | 39.9p |
| 06:00 | 22.6p | 18:00 | 41.2p |
| 06:30 | 24.5p | 18:30 | 41.5p |
| 07:00 | 23.8p | 19:00 | 29.8p |
| 07:30 | 25.5p | 19:30 | 29.2p |
| 08:00 | 23.6p | 20:00 | 28.5p |
| 08:30 | 23.7p | 20:30 | 27.4p |
| 09:00 | 22.5p | 21:00 | 27.3p |
| 09:30 | 21.5p | 21:30 | 25.3p |
| 10:00 | 20.4p | 22:00 | 24.5p |
| 10:30 | 19.5p | 22:30 | 22.2p |
| 11:00 | 18.8p | 23:00 | 22.5p |
| 11:30 | 18.2p | 23:30 | 21.2p |
Prices were lowest in Apr (average 17.9p) and highest in Sep (30.3p). The single cheapest half-hour was -12.4p and the dearest 97.3p.
Month by month
| Month | Average Agile price |
|---|---|
| Jan | 24.4p |
| Feb | 20.8p |
| Mar | 24.4p |
| Apr | 17.9p |
| May | 23.2p |
| Jun | 22p |
| Jul | 23.8p |
| Aug | 29.1p |
| Sep | 30.3p |
| Oct | 28.5p |
| Nov | 20.3p |
| Dec | 19.6p |
Selling back: Agile Outgoing
Agile Outgoing paid an average of 11.1p per kWh in South West England over the same year, and 19.1p 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 South West England
| Tariff | Standing charge, p/day | Unit rates, p/kWh |
|---|---|---|
| Flexible Octopus | 57.22 | 27.9p |
| Agile Octopus | 66.07 | average 23.7p |
| Octopus Go | 58.30 | 9.9p / 36.4p |
| Intelligent Octopus Go | 58.30 | 6.9p / 38.1p |
| Cosy Octopus | 58.30 | 14.8p / 30.2p / 45.3p |
| Octopus Flux | 58.30 | 17p / 28.1p / 39.2p |
Octopus public API, fetched 25 October 2026; import prices with 5% VAT.
Plug-in solar in South West England
For Exeter, PVGIS (European Commission JRC) gives about 604 kWh a year from 800 W of upright south-facing balcony panels and 841 kWh angled at 35°. Check the payback and get permission letters.
Frequently asked questions
When is electricity cheapest on Agile in South West England?
Over 25 October 2025 to 25 October 2026, the cheapest three hours on an average day in region L were 12:00–15:00, averaging 17.9p per kWh, against 38.4p from 16:00 to 19:00. 3% of half-hours were below zero.
Is a home battery worth it on Agile in South West England?
In Fortyeight’s model a typical 2,500 kWh home in South West England saves about £229 a year with a 10 kWh battery on Agile, so the battery would need to cost under £2,080 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 South West England?
PVGIS data for Exeter give about 604 kWh a year for 800 W of upright, south-facing balcony panels and 841 kWh angled at 35°, before shading.
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