UK homeowner cuts daytime grid use by 65 kWh in first week after installing 10 kWh battery and solar
By Eve
A UK household on Octopus Go reduced daytime grid imports from roughly 80 kWh to around 15 kWh in the first week after installing two Anker Solarbank 4 Pro units (10 kWh total) and four 410 watt solar panels, according to a Reddit post. The system avoided approximately 65 kWh of peak rate purchases (30.1p per kWh) by storing 30 kWh during the day and using 10 kWh directly, delivering a net saving of about £16.50 in the first week. Overnight charging at 8.5p per kWh cost around £3 for 35 kWh.
Why it matters
The case demonstrates measurable payback velocity for residential battery and solar combinations on time of use tariffs, a model that could inform business cases for domestic storage rollouts. For installers and equipment suppliers, the data point offers a real world reference for customer savings claims in the UK market.
Source
- Original title
- “Just one week after homeowner installs 10-kWh battery, daytime grid use dropped and saved them about $20”
- Published
- 8 October 2026
In this story
- Topic
- Grid & Energy
- Place
- United Kingdom
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