Solar Inverter Replacement — Fast & Professional in Cardiff
Your solar inverter is the heart of your solar system — it converts the DC electricity generated by your panels into the AC electricity your home uses. When an inverter fails or underperforms, your entire solar system stops generating, costing you money every day it's not working.
GL Solar provides fast inverter diagnosis and replacement services across Cardiff and South Wales. We work with all major inverter brands — SolarEdge, SMA, Fronius, Growatt, Solax, Solis, Ginlong and more. Our experienced engineers can often diagnose the fault remotely from your monitoring data before we even visit.
If your inverter is showing error codes, has stopped generating, or is simply getting old (most inverters last 10–15 years), contact our Cardiff team for a fast diagnosis and competitive replacement quote.
What's Included
Remote Fault Diagnosis
We often diagnose inverter faults remotely from your monitoring data before visiting.
Inverter Replacement
Fast replacement of faulty inverters with compatible or upgraded units.
All Brands Covered
SolarEdge, SMA, Fronius, Growatt, Solax, Solis, Ginlong and more.
Upgrade Opportunity
Inverter replacement is a great opportunity to upgrade to a smart hybrid inverter with battery capability.
Monitoring Reconnection
We reconnect and reconfigure your monitoring system after replacement.
Updated Certification
Updated electrical certificates and MCS documentation after replacement.
Our Process
Remote Diagnosis
We review your monitoring data and error codes to diagnose the fault before visiting.
Site Visit & Confirmation
Our Cardiff engineer visits to confirm the diagnosis and assess replacement options.
Replacement Recommendation
We recommend the best replacement inverter — same model, compatible alternative or upgrade.
Inverter Replacement
We replace your inverter quickly and professionally, typically in 2–4 hours.
Commissioning & Testing
The new inverter is fully commissioned and tested to ensure your system is generating correctly.
Monitoring & Certification
We reconnect your monitoring, update your MCS documentation and issue updated certificates.
Why Choose GL Solar Cardiff?
All Brands Covered
We replace inverters from all major brands — not just the ones we install.
Cardiff Based
Fast response times across Cardiff and South Wales.
NAPIT Approved
All electrical work carried out by NAPIT-approved electricians.
Upgrade Options
We can upgrade your inverter to add battery capability or improve performance.
“Our SMA inverter failed after 11 years. GL Solar diagnosed it remotely from our monitoring data, came out the next day and replaced it with a new Growatt hybrid inverter. We're now battery-ready too. Fast, professional and great value.”
Frequently Asked Questions
Areas We Cover in Cardiff & South Wales
GL Solar provides Inverter Replacement services across Cardiff and the wider South Wales region. Whether you're in the city centre or the surrounding valleys, our local team is ready to help.