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Home Battery Savings in Southern England

On Octopus Go in Southern England, you pay 9.5p/kWh overnight and 34.42p during the day. An 11.5kWh battery charges at the cheap rate and saves you £941/year.

TL;DR

Octopus Go in Southern England charges 9.5p/kWh overnight (00:30–05:30) and 34.42p during the day. An 11.5kWh Habo Energy battery charges overnight and powers your home during the day, avoiding the 34.42p daytime rate. That’s a saving of 24.9p on every stored kWh, or approximately £941/year.

Octopus Go rates in Southern England

Southern England: 34.42p daytime / 9.5p overnight

On the current Octopus Go 12-month fixed tariff (GO-FIX-12M-26-03-23), households in Southern England pay 34.42p/kWh during the day and 9.5p/kWh overnight (00:30–05:30), with a standing charge of 56.34p/day. The off-peak rate is the same across all regions; the daytime rate varies.

For comparison, the standard variable tariff in Southern England is 24.98p/kWh (Ofgem cap, Q2 2026) – a flat rate with no cheap overnight window.

This covers postcodes: BH, GU, PO, RG, SO, SP – including Southampton, Portsmouth, Bournemouth, Reading, Guildford. Your distribution network operator is Scottish and Southern Electricity Networks.

About Southern England

Southern England benefits from some of the best solar irradiance in the UK, with a housing stock of larger detached and semi-detached homes providing ample roof space. The area between Southampton and Reading has some of the fastest EV adoption rates in the country, strengthening the case for battery storage to manage combined solar and EV charging loads.

According to MCS data, at least 7,078 certified home battery installations have been completed in the Southern 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 34.42p 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
34.42p
Octopus Go
daytime rate (Southern England)
24.9p
Saved per kWh
on stored energy
£941
Estimated annual saving
(11.5kWh battery)
The calculation (Octopus Go rates for Southern England, April 2026)
11.5kWh × 90% round-trip efficiency = 10.35kWh usable per cycle
(34.42p daytime − 9.5p overnight) × 10.35kWh = 258p saved per day
258p × 365 days = £941/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 Southern 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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