Retrofit 10kWh Battery to Existing Solar in Corsham
Corsham, Wiltshire (SN13) — 3-bed semi-detached
The homeowner had a 4kW solar system installed by another company in 2019 but was exporting 65% of their generation. They wanted a battery to capture more of their own electricity.
The Challenge
The existing string inverter was incompatible with battery storage. The original installer had ceased trading. The homeowner had no maintenance support and limited understanding of their system performance.
Our Solution
We replaced the existing inverter with a Sigenergy hybrid unit (compatible with the existing panels) and added a 10kWh battery in the garage. We also fixed two panels that had developed bypass diode faults — reducing output by approximately 15%.
The Result
Self-consumption jumped from 35% to 83%. The fixed panels restored 15% of lost generation. Combined, the homeowner now saves an additional £580 per year. We also enrolled them in our annual service plan.
“Lumos took over aftercare from our previous installer who had gone bust. They found faults we did not know we had and the battery has made the whole system work so much harder. Wish we had found them years ago.”
L. Cooper
Corsham, Wiltshire
System Specifications
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