Welcome To NSI Energy
I’m really pleased to introduce you to NSI. We’ve built a strong reputation over more than 45 years by doing things the right way—with respect, honesty, and a genuine focus on great service. It means a lot to us that so many of our customers come back to us or recommend us to others.
We’re always ready for a new challenge and enjoy helping both new and long-standing clients to address their sustainable energy needs. If you’re looking for a down-to-earth, professional team that delivers smart, timely, and cost-effective solutions, we’d love to hear from you.
All the best,
Simon Byway (Managing Director)

Specialising in Commercial Solar PV
At the core of NSI Energy is a deep understanding and experience of how to improve the energy efficiency of commercial buildings.
We help customers to get a better understanding of the energy usage of their existing and future buildings and provide practical solutions to help reduce costs and emissions, improve compliance and enhance the sustainability of their real estate.
We believe that solar systems are a significant tool to help businesses reduce their emissions and head towards net zero and our expertise in solar PV technology enables us to provide reliable, sustainable systems that deliver lasting benefits.
45+ Years of Industry Experience
With decades at the forefront of helping customers to optimise the efficiency of their buildings, NSI Energy brings unrivalled experience to every commercial solar PV project.
Our extensive knowledge and proven track record make us a leading provider of solar solutions. We leverage this experience to deliver systems that meet the highest standards of quality and performance.
ISO 9001, 45001, 14001 Certification
In today’s competitive business environment, NSI continually strives to demonstrate our commitment to quality, environmental sustainability, and occupational health and safety.
Achieving ISO 9001, ISO 45001, and ISO 14001 certifications is independent assurance showing our competence and continual focus on getting better at what we do.

Environmental Policy
NSI Projects fully accepts its environmental responsibilities and recognises its obligation to contribute to the resolution of global and local environmental issues by reducing its environmental impacts and by taking a leading role in promoting environmental good practice. We are committed to being guided by the following principles:
- The practice of responsible energy management through reduced consumption and the encouragement of energy efficiency .
- The choice of products and suppliers which minimise negative environmental impacts.
- The minimisation of waste by reduced consumption and the development of effective waste management procedures.
- The avoidance of the unnecessary use of hazardous materials and processes.
- The integration of environmental concerns into all planning and design decisions.
- The improvement of staff environmental awareness and understanding.

Get Started with Saving Energy Today
Contact NSI Energy today to discuss your solar and energy needs.