BATTERy repair and maintenance

Battery System Repairs & Maintenance — Protect Your Investment

A battery system is a significant investment, and keeping it in peak condition ensures you get maximum return over its lifespan. Whether you're experiencing faults, unusual behaviour, or just want a routine health check, Steel City Solar & Electrical provides expert battery system servicing throughout the Hunter Valley.
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OUR SOLUTIONS

Battery Repair & Maintenance Services

Battery Fault Diagnosis
We diagnose faults across all major battery systems — including Tesla Powerwall, BYD, Sungrow, SolarEdge Energy Bank, and more. From communication errors to hardware failures, we identify the issue accurately and efficiently.
Battery Replacement
Batteries degrade over time and may need replacing before your solar system does. We supply and install replacement battery units or modules, and reconfigure your system for optimal performance.
Inverter-Charger Servicing
For off-grid and hybrid systems, the inverter-charger is critical. We service, repair, and replace inverter-chargers from brands including Victron, Selectronic, SMA, and Fronius.
Battery Health Assessments
We perform detailed battery capacity and health testing — measuring State of Health (SoH), cycle counts, and charge/discharge behaviour — giving you a clear picture of your battery's remaining performance and lifespan.
Annual Battery System Inspection
A scheduled annual inspection checks all connections, cell balancing, BMS (Battery Management System) firmware, and ventilation — keeping your system running safely and efficiently.
THE PROCESS
Our 5 Step Battery Installation Process:
STEP 1
Contact Us
Reach out and describe the issue — including any error codes, unusual behaviour, or alerts from your monitoring app.
STEP 2
Remote Diagnosis
For systems with remote monitoring, we can often identify faults before scheduling a site visit, saving time for both parties.
STEP 3
On-Site Assessment
Our technician inspects the battery system, BMS, connections, and associated components to identify the root cause.
STEP 4
Repair, Service, or Replacement
We carry out the required work — whether that's a firmware update, component repair, or full battery replacement. Warranty claims are managed on your behalf.
STEP 5
 Performance Confirmation & Report
We verify the system is functioning correctly, confirm performance metrics, and provide a written service report.
FAQS

Find the
answers
you need

My battery isn't charging — what could be wrong?

Common causes include inverter communication errors, BMS protection mode being triggered, a blown fuse or tripped breaker, or firmware issues. Note any error codes on your inverter or battery display and contact us — we can often diagnose remotely.

How does a battery work?

A solar battery works by storing excess electricity generated by your solar panels during the day, allowing you to use that stored energy when the sun isn’t shining—like at night or during cloudy weather. Instead of sending surplus power back to the grid, your system first charges the battery, which then discharges to power your home when solar output drops. This setup reduces your reliance on the grid, lowers your electricity bills, and can even provide backup power during blackouts if your system includes that feature.

How long do home batteries last?

Most modern lithium battery systems are warranted for 10 years or a specific number of charge cycles (e.g., 6,000 cycles for BYD, 3,750 cycles for Tesla Powerwall). Real-world lifespan depends on usage patterns, temperature, and how the battery is managed.

Can you repair a Tesla Powerwall or BYD battery?

For warranty issues, we coordinate directly with the manufacturer on your behalf. For out-of-warranty faults, we can diagnose and, where technically possible, repair or replace specific components.

Is my battery system covered under warranty?

Most battery systems carry a 10-year manufacturer warranty covering defects and capacity retention. We'll help you review your warranty terms and prepare any claim documentation needed.

How do I know if my battery is underperforming?

Signs include your home drawing more grid power than usual in the evening, the battery reaching full charge unusually quickly, or your monitoring app showing lower than expected discharge. A battery health assessment will confirm whether performance is within normal parameters.

Do you service batteries from all brands?

Yes — we service and repair battery systems from all major brands regardless of who installed them, including Tesla Powerwall, BYD, Sungrow, SolarEdge, Enphase, Alpha-ESS, and more.

Are there government rebates for solar batteries in NSW?

Yes — NSW homeowners may be eligible for state and federal incentives for installing solar batteries. We’ll guide you through the process so you can maximise your savings.

WHY CHOOSE STEEL CITY?
Why choose Steel City Solar & Electrical
A Decade of Trusted Energy Solutions
With nearly ten years in the industry and hundreds of successful projects, we remain committed to delivering tailored solutions and pushing the boundaries of what’s possible.
All Work Kept
In-House
Unlike most companies, we keep every job in-house — no subcontractors — so you always know who’s arriving and can rely on consistent, high-quality service every time.
SAA-Accredited Expertise
As an SAA-accredited provider in solar, batteries, and off-grid systems, we service homes, businesses, rural properties, and industrial sites — making us the right fit for any project.
Tailored Solutions, Done Right
We don’t believe in one-size-fits-all. That’s why we offer a free, no-obligation site visit to assess your property properly — giving you expert advice, honest service, and a system designed to fit your exact needs.
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© 2025 Steel City Solar & Electrical. All rights reserved.