Domestic / Residential
7.52kWp Longi all-black array with 6kW Sigenergy hybrid inverter and 9kWh battery storage.
Another stunning install complete — this time in Clitheroe. Alliant Energy has just finished a beautiful solar system for a Lancashire homeowner: 16 × Longi 470W all-black panels neatly integrated on a slate roof, paired with a 6kW Sigenergy hybrid inverter and 9kWh Sigenergy battery storage. This Clitheroe homeowner is now set up to generate their own clean energy and store it for evenings and cloudy days — meaning maximum savings on energy bills all year round. The all-black panels look incredible on the slate roof, and the Sigenergy system is one of the sleekest battery units on the market right now. With energy prices still high, systems like this are paying for themselves faster than ever. Alliant Energy covers Clitheroe, Nelson, Burnley, Colne, and the wider Lancashire area.
Like most domestic / residential operations, Clitheroe Residential — Sigenergy faced a structural exposure to wholesale electricity prices — a cost line that doubled for many UK businesses between 2021 and 2023 and shows no sign of returning to pre-crisis levels. With significant daytime load and suitable roof space, on-site generation was the obvious lever, but the project needed to stand on its own commercial merits: predictable payback, manufacturer-backed warranties, and zero operational disruption during install.
Following a structural roof survey and DNO capacity check, Alliant Energy specified a 7.52kWp array using 16 × Longi 470W high-efficiency mono-PERC panels, paired with a Sigenergy 6kW Hybrid hybrid inverter and 9kWh Sigenergy of lithium iron phosphate (LFP) battery storage. The Sigenergy 6kW Hybrid platform was chosen for its export-management capability and remote firmware updates, allowing the array to be tuned over its life without site visits. Battery storage was sized to absorb mid-day generation peaks and discharge across the early evening, lifting on-site solar self-consumption from a typical 35–45% to over 70%.
The full installation completed in 2 days, scheduled around the customer's operating hours to avoid downtime. Work was carried out by Alliant Energy's directly employed MCS-registered engineers — no subcontracted labour. The system was commissioned to G99 requirements, registered with the Microgeneration Certification Scheme, and handed over with monitoring access, electrical certification, and structural sign-off documents on the day of completion.
In its first full year of operation the system is on track to save Clitheroe Residential — Sigenergy approximately £1,780 on electricity costs, with a payback term of 5.9 Years and a projected total ROI of 510%. Over the 25-year warranted life of the panels, the cumulative saving is forecast at £44,500 — a figure that improves materially if grid prices continue their long-term upward trend, and that benefits from the UK's 100% full-expensing capital allowance for qualifying solar assets.
The installation displaces roughly 1.8 Tonnes of CO₂ emissions every year compared with grid-sourced electricity. Over the system's 25-year design life that is the equivalent of removing more than Clitheroe Residential — Sigenergy's entire annual Scope 2 footprint several times over — a material data point for ESG, B-Corp and net-zero reporting frameworks.
Domestic / Residential businesses typically run daytime electrical loads — refrigeration, machinery, IT, lighting, compressors — that overlap closely with solar generation. That overlap is what drives strong economics: every unit generated and consumed on-site replaces a unit that would otherwise be bought from the grid at full commercial rates. The Clitheroe Residential — Sigenergy project demonstrates how the model scales for this kind of operation.
Alliant Energy installed a 7.52kWp solar PV system using 16 × Longi 470W panels paired with a Sigenergy 6kW Hybrid inverter and 9kWh Sigenergy of battery storage. The installation took 2 days from arrival on site to commissioning.
Clitheroe Residential — Sigenergy saves approximately £1,780 per year on electricity, with projected lifetime savings of £44,500 over the system's 25-year guaranteed performance period. The payback term is 5.9 Years, delivering a total ROI of 510%.
This project was paid for directly by the customer. Under the UK's full-expensing capital allowance, the entire cost can be deducted from corporation tax in year one — improving the effective payback meaningfully for profitable companies.
The system avoids around 1.8 Tonnes of CO₂ emissions every year compared with grid-sourced electricity. Over a 25-year design life that's a material contribution toward Scope 2 reduction and any ESG or net-zero reporting commitments the business holds.
Probably — the same hardware platform (panels, hybrid inverter, optional battery) scales from roughly 10kW up to 1MW+. The deciding factors are roof area, daytime electricity use, current unit rate, and grid-connection capacity. Alliant Energy carries out a free desktop feasibility study and follow-up site survey before quoting.
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MCS certification isn't a box-ticking exercise — it qualifies your system for Smart Export Guarantee payments and government grants. Our installers are also NICEIC-approved and TrustMark-registered, and every install is fully insured.
