Home Battery Savings in South Wales

Octopus Go rates in South Wales

On the current Octopus Go 12-month fixed tariff, households in South Wales pay 31.67p/kWh during the day and 9.5p/kWh overnight (00:30–05:30), with a standing charge of 61.74p/day. The off-peak rate is the same across all regions; the daytime rate varies.

For comparison, the standard variable tariff in South Wales is 24.9p/kWh (Ofgem cap, Q2 2026) – a flat rate with no cheap overnight window.

This covers postcodes: CF, LD, NP, SA – including Cardiff, Swansea, Newport. Your distribution network operator is National Grid Electricity Distribution.

About South Wales

South Wales has a significant proportion of older terraced housing in the valley communities, many of which are solid-walled properties with higher-than-average heating demands. Welsh Government energy efficiency schemes are available alongside UK-wide programmes, and the region benefits from strong coastal wind resources.

According to MCS data, at least 3,788 certified home battery installations have been completed in the South Wales 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 31.67p daytime rate. The saving is the difference between those rates, multiplied by how much energy the battery delivers each cycle.

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 Wales 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.

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.