8kW Solar & 16kWh Battery in Devizes
Devizes, Wiltshire (SN10) — Barn conversion with annex
A large barn conversion with a home office annex. Extremely high electricity usage of over £350 per month. The standing seam metal roof was ideal for solar mounting.
The Challenge
Very high electricity consumption across main house and annex. The owner works from home running servers and workshop equipment. Monthly bills exceeded £350.
Our Solution
The standing seam roof allowed clamp-on mounting with zero penetration — the fastest and cleanest install method. An 8kW array with stacked 16kWh battery storage to handle the high base load. Smart scheduling charges the battery overnight at 7.5p/kWh on Octopus Go.
The Result
Monthly bills dropped from £350+ to approximately £80. The combination of solar generation, battery storage, and time-of-use tariff optimisation saves over £2,100 annually. Estimated payback: 5.5 years.
“The standing seam installation was incredibly clean — no drilling into the roof at all. With the battery and Octopus Go, we have cut our bills by 77%. Best investment we have ever made.”
D. Marsh
Devizes, Wiltshire
System Specifications
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