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Home Battery Savings in South West England

On Octopus Go in South West England, you pay 9.5p/kWh overnight and 33.15p during the day. An 11.5kWh battery charges at the cheap rate and saves you £893/year.

TL;DR

Octopus Go in South West England charges 9.5p/kWh overnight (00:30–05:30) and 33.15p during the day. An 11.5kWh Habo Energy battery charges overnight and powers your home during the day, avoiding the 33.15p daytime rate. That’s a saving of 23.6p on every stored kWh, or approximately £893/year.

Octopus Go rates in South West England

South West England: 33.15p daytime / 9.5p overnight

On the current Octopus Go 12-month fixed tariff (GO-FIX-12M-26-03-23), households in South West England pay 33.15p/kWh during the day and 9.5p/kWh overnight (00:30–05:30), with a standing charge of 62.83p/day. The off-peak rate is the same across all regions; the daytime rate varies.

For comparison, the standard variable tariff in South West England is 24.97p/kWh (Ofgem cap, Q2 2026) – a flat rate with no cheap overnight window.

This covers postcodes: BA, BS, DT, EX, GL, PL, TA, TQ, TR – including Bristol, Exeter, Plymouth, Bath, Gloucester. Your distribution network operator is National Grid Electricity Distribution.

About South West England

The South West has the highest proportion of off-gas-grid homes in England, with many rural properties in Devon, Cornwall, and Somerset relying on electricity or oil for heating. The region has strong solar potential and high existing PV penetration, but grid constraints in the peninsula make self-consumption via battery storage more valuable than exporting to the grid.

According to MCS data, at least 7,331 certified home battery installations have been completed in the South West England region since September 2023 – part of a nationwide surge in domestic battery uptake.

Your savings with an 11.5kWh battery

The battery charges overnight at 9.5p and powers your home during the day, avoiding the 33.15p daytime rate. The saving is the difference between those rates, multiplied by how much energy the battery delivers each cycle.

9.5p
Octopus Go
overnight rate
33.15p
Octopus Go
daytime rate (South West England)
23.6p
Saved per kWh
on stored energy
£893
Estimated annual saving
(11.5kWh battery)
The calculation (Octopus Go rates for South West England, April 2026)
11.5kWh × 90% round-trip efficiency = 10.35kWh usable per cycle
(33.15p daytime − 9.5p overnight) × 10.35kWh = 245p saved per day
245p × 365 days = £893/year

Rates from the Octopus Energy API (product GO-FIX-12M-26-03-23, April 2026). Assumes one full battery cycle per day. Actual savings depend on your usage patterns.

How South West England compares

The Octopus Go off-peak rate (9.5p) is the same everywhere, but the daytime rate varies by region – so regions with higher daytime rates see bigger savings.

RegionGo daytime rateSpreadAnnual saving
South Wales31.67p22.2p£838
West Midlands32.02p22.5p£851
East Midlands32.32p22.8p£862
Northern England32.36p22.9p£864
London32.64p23.1p£874
South West England33.15p23.6p£893
Northern Scotland33.72p24.2p£915
North West England33.75p24.2p£916
South East England33.87p24.4p£921
Eastern England34.32p24.8p£938
Southern England34.42p24.9p£941
Yorkshire34.49p25.0p£944
Southern Scotland34.54p25.0p£946
North Wales & Merseyside35.73p26.2p£991

What Habo Energy offers

One 11.5kWh battery. Everything included – inverter, cables, mounting kit, and MCS certified installation. Pre-configured for UK time-of-use tariffs. If you’d prefer to use your own electrician, that’s fine too.

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