Tesla Powerwall — Cardiff's Authorised Installer
The Tesla Powerwall is the world's most recognised home battery system — and for good reason. With 13.5kWh of usable capacity, seamless solar integration, whole-home backup capability and a sleek, compact design, the Powerwall is the premium choice for Cardiff homeowners who want the best.
GL Solar is an authorised Tesla Powerwall installer serving Cardiff and South Wales. Our certified team handles everything from the initial assessment and system design through to installation, commissioning and ongoing support. We're one of the most experienced Powerwall installers in the region.
The Tesla Powerwall works seamlessly with new or existing solar panel systems, and its Backup Gateway automatically detects grid outages and switches your home to battery power in a fraction of a second — keeping your lights, fridge and essential appliances running.
What's Included
Tesla Powerwall Unit
13.5kWh usable capacity with 5kW continuous power output and 7kW peak.
Backup Gateway
Automatic whole-home backup that activates in milliseconds during a power cut.
Tesla App Setup
Full Tesla app configuration for real-time monitoring, storm watch and time-based control.
Solar Integration
Seamless integration with new or existing solar panel systems.
10-Year Warranty
Tesla's 10-year warranty with unlimited charge/discharge cycles.
Certified Installation
Installed by Tesla-certified engineers — required for warranty validity.
Our Process
Free Assessment
We assess your home's energy usage, existing solar setup and electrical panel to plan your Powerwall installation.
System Design
We design the optimal Powerwall configuration for your Cardiff home, including backup circuit planning.
Tesla Order
We place your Powerwall order directly with Tesla as an authorised installer.
Installation Day
Our certified team installs your Powerwall and Backup Gateway, typically in one day.
Tesla App Commissioning
We commission your Powerwall through the Tesla app and configure all settings for your usage.
Handover & Support
We walk you through the Tesla app and provide ongoing support from our Cardiff base.
Why Choose GL Solar Cardiff?
Authorised Installer
Tesla-certified — required for warranty validity and official support.
Whole-Home Backup
Keep your entire home powered during grid outages, not just a few circuits.
Cardiff Based
Local team with fast response times and ongoing support.
10-Year Warranty
Tesla's industry-leading warranty with unlimited cycles.
“We had our Tesla Powerwall installed by GL Solar in Cyncoed and it's been incredible. During the storms last winter we had two power cuts — our neighbours were in the dark but we didn't even notice. The Tesla app is brilliant too. Absolutely worth every penny.”
Frequently Asked Questions
Areas We Cover in Cardiff & South Wales
GL Solar provides Tesla Powerwall 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.