Domestic / Residential
32-panel all-black array with full Sigenergy smart inverter and battery storage system.
Another high-performance install completed by Alliant Energy Ltd for a Blackburn homeowner. 32 all-black solar panels laid out neatly across the main roof and rear extension, paired with a full Sigenergy system — smart hybrid inverter and stackable battery storage — for seamless self-consumption and grid-independence. A clean, high-output setup designed to maximise self-consumption, cut energy bills, and future-proof the home with renewable power. Great work by the team, real results for another Blackburn homeowner. Thinking about solar or battery storage? Get in touch for clear, honest advice — no pressure.
Like most domestic / residential operations, Blackburn 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 15.2kWp array using 32 × 475W high-efficiency mono-PERC panels, paired with a Sigenergy Hybrid hybrid inverter and Sigenergy Battery Stack of lithium iron phosphate (LFP) battery storage. The Sigenergy 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 3 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 Blackburn Residential — Sigenergy approximately £3,150 on electricity costs, with a payback term of 5.6 Years and a projected total ROI of 540%. Over the 25-year warranted life of the panels, the cumulative saving is forecast at £78,750 — 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 3.4 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 Blackburn 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 Blackburn Residential — Sigenergy project demonstrates how the model scales for this kind of operation.
Alliant Energy installed a 15.2kWp solar PV system using 32 × 475W panels paired with a Sigenergy Hybrid inverter and Sigenergy Battery Stack of battery storage. The installation took 3 days from arrival on site to commissioning.
Blackburn Residential — Sigenergy saves approximately £3,150 per year on electricity, with projected lifetime savings of £78,750 over the system's 25-year guaranteed performance period. The payback term is 5.6 Years, delivering a total ROI of 540%.
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 3.4 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.
Three ways to get started
Get a tailored quote in one working day. No obligation. No hard sell. Speak to a renewable energy engineer — not a salesperson — at a time that suits you.
Accreditations
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.
