Electrical installation
Residential and commercial electrical work, switchboards, renovations, lighting, EV charging, backup power, fault finding and project delivery.
Christchurch based · South Island installation company
The people behind work that has to last.
Grenz Electrical is an owner-led electrical installation company. We take responsibility for what happens on site—from the first look at the existing installation through to testing, certification and handover.
Local team. Clear responsibility.
Based in Christchurch and resourcing electrical and solar installation projects throughout the South Island.
Registered electrical teamElectrical work completed and certified properlyInspector-ledCompliance experience stays close to the workFive-year workmanship warrantyWe remain accountable after handover
Who we are
Built by people who understand the work—not just how to sell it.
Grenz Electrical is led by Will Grenz, a registered electrician and Electrical Inspector whose background also includes teaching the trade. That mix of installation, inspection and training experience shapes the standard expected from every job.
We have grown around one straightforward idea: the finished result should be safe, serviceable, well documented and sensible for the person who owns it. That means asking better questions before work starts, treating the property carefully and being available when something needs attention later.
Clear scope before work begins Careful work around the property Testing and documentation included A real team to call after handover
What Grenz Electrical does
One installation company, three areas of responsibility.
This is the team, experience and accountability behind work completed on site. Electrical, solar and inspection responsibilities stay clear throughout the project.
Solar and battery installation
DYSolar, a Grenz Electrical brand, leads solar design and sales. Grenz Electrical verifies the site and completes all on-site installation, commissioning and certification. Aftercare is coordinated jointly.
Inspection and compliance
Electrical inspections, compliance checks and condition reporting, with the required independence maintained whenever inspection work is separate from installation.
Work completed by our team
Real projects. Shown properly.
These are Grenz Electrical installations—the same higher-resolution project photography used by DYSolar to show customers who completes the physical work.
Independently recognised
Independent accreditations and quality assurance.
Download our current certificates for solar quality, health and safety, and electrical workmanship.
Solassure Certified
Independent certification recognising our commitment to quality, clear processes and customer care in solar installation.
Download Solassure certificate
Tōtika prequalified
Our health and safety systems are independently assessed through Qualify365 under the Tōtika framework.
Download Tōtika certificate
Master Electricians Quality Assured
Quality-assured membership covering fair business practice, technical standards and professional accountability.
Download quality assurance certificateSEANZ memberPart of New Zealand’s sustainable-energy industry body.Registered Electrical InspectorInspection and compliance experience within the team.Five-year workmanship warrantyBacked by Grenz Electrical after the job is complete.
Start with the site
Tell us what needs doing.
We are based in Christchurch and work across the South Island. Send the address, a short description and any useful photos, plans or electricity bills.