Upgrade, Maintain
& Optimize Your
Renewable Energy
SJ1 Renewables upgrade, maintain and optimise commercial solar PV, wind turbine, hydro and battery storage systems across the UK. We support farms, estates and businesses with practical engineering solutions to restore performance, extend asset life and improve system value. Where a full new installation is required, we also design and deliver complete renewable energy projects.
How Can We Help?
Support for aging systems, new renewable projects and long-term asset performance.
Upgrade an Existing System
Replace aging inverters, improve monitoring, add battery storage and recover lost performance.
Assess a Site or Opportunity
Use our calculators and technical insights to understand site potential, output and next steps.
Develop a New Project
Full design and delivery for solar PV, wind and hydro schemes where a new installation is required.
Battery Storage
Add battery storage to new or existing systems to improve self-consumption, manage export and increase site flexibility.
Learn More →PV Upgrades
Replace aging inverters, resolve underperformance and modernise older systems for improved reliability and yield.
Learn More →Wind Turbine Repowering
Upgrade key components and control systems to restore output, improve reliability and extend turbine life.
Learn More →Maintenance Services
Inspection, fault finding and ongoing maintenance for solar, wind and hydro systems to keep assets working properly.
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Engineering-Led Renewable Energy Support
SJ1 Renewables takes a practical, whole-site approach to renewable energy. From inverter replacement and battery retrofits through to complete project delivery, we focus on systems that work reliably, perform properly and suit the site they serve.
- Upgrade and optimisation of existing renewable assets
- Technical support for solar, wind, hydro and battery systems
- Practical engineering from assessment through to delivery
- Long-term maintenance and support for working systems
Projects That Deliver
View All Projects →
Battery Storage
Battery Storage Retrofit
Retrofitting battery storage to an existing commercial solar PV system, increasing self-consumption and reducing grid exports.
Solar Power
Commercial Solar Installation
A commercial scale solar PV system delivering significant income for a Solar PV developer.
Wind Power
Single Wind Turbine Project
A 50kW wind turbine installation serving a rural business with consistent power generation.
Assess Performance & Explore Next Steps
Technical guidance and practical tools to help assess renewable energy sites, system output and upgrade opportunities.
Ready to Improve or Develop Your Renewable Energy System?
Whether you are upgrading an aging installation, adding battery storage or planning a new project, we can help assess the site and identify the right next step.