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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 £854/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 22.6p on every stored kWh, or approximately £854/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)
22.6p
Saved per kWh
on stored energy
£854
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
10.35kWh × 33.15p − 11.5kWh × 9.5p = 234p saved per day
234p × 365 days = £854/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 Wales31.67p21.1p£798
West Midlands32.02p21.5p£811
East Midlands32.32p21.8p£822
Northern England32.36p21.8p£824
London32.64p22.1p£834
South West England33.15p22.6p£854
Northern Scotland33.72p23.2p£875
North West England33.75p23.2p£876
South East England33.87p23.3p£881
Eastern England34.32p23.8p£898
Southern England34.42p23.9p£902
Yorkshire34.49p23.9p£904
Southern Scotland34.54p24.0p£906
North Wales & Merseyside35.73p25.2p£951

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.

Ready to start saving?

Ready to start saving? Reserve your Habo Energy battery with a refundable deposit.

Reserve for £49