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Bureau Veritas certified PSW Energy to ISO 9001, ISO 14001 and ISO 45001 on 23 January 2025. Those are management-system standards: they audit how the business runs, not how the panels perform. Useful to know about a company you are trusting with a ten-year warranty, and irrelevant to which battery goes on your wall.
ISO certification record
- Certified by Bureau Veritas on 23 January 2025: ISO 9001 quality, ISO 14001 environment, ISO 45001 safety.
- These are audited management systems, renewed on a cycle by an external body. They are not product certifications and not installer accreditation.
- What they are actually evidence of: that there is a documented process behind the job and someone outside the company checks it.
- What they are not evidence of: that your system is designed right. No management standard inspects a roof.
Scope of the three standards
ISO 9001 is quality management. In practice it means the steps between a quote and a commissioned system are written down, followed the same way each time, and reviewed when they go wrong. The value of that is not the paperwork — it is that a problem in year four gets handled by a process rather than by whoever happens to answer.
ISO 14001 is environmental management: waste handling, sourcing, disposal. In this industry the honest version of that is packaging, old panels and old batteries, and it matters more every year as the first wave of systems comes off roofs.
ISO 45001 is occupational health and safety. This is the one that earns its keep. The work is on roofs, in ceiling spaces and inside switchboards, and the standard forces a documented approach to the risks rather than a reliance on people being careful.
Limits of certification
Some, and less than the original version of this page suggested. An audited management system is a real signal about durability — it costs money to hold and it is withdrawn if the audits fail, so a company carrying one has decided to be inspected. In an industry where the common failure is a business disappearing before the warranty does, that is worth something.
It is not a quality guarantee for your install. Certification checks that the process exists and is followed; it does not check that the process is the best one, and it has nothing to say about whether the system was sized for your house. Anyone presenting ISO certification as proof their quote is right is stretching it.
The word to watch for is “triple certified”, which sounds like a fourth thing and is not one. It is three separate standards, each audited on its own terms.
Other installer credentials
The credentials answer different questions and are not interchangeable. ISO audits the management system. The NETCC audits sales conduct, contracts and complaint handling. SAA accredits the individual designer and installer. A manufacturer tier like Sigenergy Gold reflects the supplier relationship. Volume rankings count kilowatts.
Worth checking which one a company actually holds when it says “certified”, because the word is doing a lot of work in this industry and often is not attached to anything.
References: Bureau Veritas Certification — ISO 9001:2015, ISO 14001:2015, ISO 45001:2018, issued 23 January 2025. Health, Safety, Environment and Quality policy.