Turning a failed solar asset into a high‑performance energy investment
Client: JSP Ltd
Site: Worsham Mill
Installed Capacity: 346.62 kWp
Delivered by: SMARTech energy
SMARTech energy® delivered a highly successful commercial Solar PV upgrade and expansion at JSP Ltd’s Worsham Mill site, transforming a non‑functional legacy system into a high‑performing renewable energy asset.
By combining detailed energy analytics, selective reuse of existing infrastructure, and intelligent system redesign, the project now achieves close to 100% on‑site self‑consumption, minimal grid export, and an estimated 4‑year simple payback with a ~500% lifetime ROI over 20 years.
This project demonstrates how underperforming or ageing Solar PV systems can be upgraded into revenue‑generating assets that materially reduce operating costs, protect against energy price volatility, and support long‑term sustainability goals.
The Client challenge
JSP Ltd had invested previously in Solar PV, but the original system was no longer operational. This created several business risks:
- Loss of on‑site renewable generation
- No meaningful return on earlier capital investment
- Rising exposure to grid electricity prices
- Lack of performance visibility or actionable data
- Negatively impacting client trust in technology
The requirement was not a like‑for‑like replacement, but a solution that maximised value from existing assets while delivering long‑term commercial performance.
The SMARTech approach
SMARTech energy® adopted a data‑led, asset‑optimisation strategy rather than a full strip‑out and replacement. Key elements of the solution included:
- Detailed load analysis using historic monitoring data to accurately match generation to site demand
- Selective decommissioning of non‑performing legacy arrays
- Retention of viable infrastructure where performance remained acceptable
- Installation of higher‑efficiency PV modules to replace underperforming sections
- Expansion across multiple roof orientations (N‑W, S‑E and S‑W) to extend daily generation profiles
- Export limitation in full compliance with G99/G100 requirements
- Deployment of remote monitoring for real‑time performance tracking and optimisation
This approach ensured the system was correctly sized, avoided costly overspecification, and maximised on‑site utilisation of generated electricity.
System overview
- Total installed capacity: 346.62 kWp
- Inverters: 5 × Solis commercial inverters
- Grid compliance: Export limitation in line with DNO requirements
- Warranties: Long‑term manufacturer warranties on panels and inverters
The final design delivers consistent generation throughout the working day, aligning production closely with operational demand.
Measured performance
Live monitoring data confirms that the system is exceeding expectations.
July – December 2025:
- Modelled generation: 130,774 kWh
- Actual generation: 139,740 kWh
- Performance vs prediction: 107%
Several months significantly outperformed forecast output, validating both the system design and commissioning quality.
Financial results
The financial performance has exceeded projections by a substantial margin.
July – December 2025:
- Predicted import cost avoidance: £23,933
- Actual import cost avoidance: £32,912
- Electricity unit rate: ~£0.23/kWh
With export kept deliberately low, the system prioritises self‑consumption, delivering maximum financial benefit directly to the business.
Environmental impact and strategic benefits
- Significant reduction in grid‑supplied electricity
- Measurable reduction in associated carbon emissions
- Direct contribution to JSP Ltd’s sustainability and Net Zero objectives
- Improved resilience against future energy price volatility
Value delivered to the Client
- Immediate and verifiable reduction in electricity costs
- Recovery and extension of value from existing solar assets
- Transparent performance data via remote monitoring
- Long‑term operational visibility and optimisation capability
- A future‑proofed renewable energy platform
Why this matters for other businesses
This project demonstrates that commercial Solar PV success is not just about installing more panels. The real value lies in:
- Correct system sizing
- Intelligent reuse of existing assets
- High on‑site self‑consumption
- Verified, data‑backed performance
SMARTech energy® delivers Solar PV solutions that perform as financial assets, not just sustainability statements.
Upgrade or optimise your Solar PV
Already have Solar PV on site?
Whether your system is underperforming, ageing, or no longer operational,
SMARTech energy® can assess, upgrade, and optimise your installation to deliver measurable commercial returns.
