Hilts Group Australia
Solar System Upgrades & Maintenance — St Ives & Greater Sydney
Hilts Group Australia — CEC-accredited local experts for inverter replacements, panel cleaning, system expansion, fault diagnosis, battery upgrades, monitoring & EMS tuning, and ongoing maintenance.
If your solar system is not working (Sydney) or underperforming, we’ll diagnose, fix, and future-proof it with guaranteed compliance and top-tier workmanship.
Get Free Solar Quote
Quick Triage — Solar System Not Working?
Use this checklist before calling our team. Take photos of screens and wiring for faster diagnosis.
No Power / 0 kW Output
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Check AC isolator and breakers are ON
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Look for inverter lights or error messages
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Book a system diagnosis
Poor Production vs Expected
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Shading from trees, dirty panels, or string mismatch
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Incorrect CT sensor or outdated firmware
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Enable Smart Monitoring
Battery Not Charging / Discharging
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Verify EMS schedule, reserve SOC, and VPP control
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Check RS485/CAN communications
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Battery & Hybrid Systems
Frequent Inverter Trips
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Grid voltage/frequency instability or thermal limits
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Faulty rooftop isolators
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Emergency Repair
App Not Updating / Negative Readings
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Wi-Fi dropout or CT reversal
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Incorrect phase wiring
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Fix Monitoring Issues
Successful Installations
Clean Energy Generated
Of Trees Saved
Don't Just Fix It, Future-Proof It: The Value of Proactive Care
Solar maintenance is more than a repair—it’s an investment that protects your larger investment. Here’s what you gain:
- Maximise Your Savings: Restore up to 25% of lost energy yield caused by dirt, faults, or inefficiencies. That’s money back in your pocket.
- Avoid Costly Emergencies: Proactive checks identify small issues (like corrosion) before they become expensive, system-wide failures.
- Ensure Safety & Compliance: Outdated systems can be hazardous. We ensure your system meets the latest AS/NZS standards, keeping your family and home safe.
- Unlock New Technology: Prepare for batteries, VPPs, and smart energy management. We make your existing system ready for the next upgrade.
Think of us as your solar system’s personal mechanic.
Our Comprehensive Solar Services
From simple tweaks to major upgrades, we provide end-to-end solutions for your solar power system.
🔧 Inverter Replacements & Re-Commissioning
Fronius, Sungrow, SMA, GoodWe, SolarEdge, Enphase, Sigenergy, Fox ESS
Your inverter is the brain of your system. We ensure new installations are optimized for MPPT tracking and DNSP export limits.
💧 Panel Cleaning & Performance Restoration
Dirt, grime, and bird droppings can significantly reduce output. Our professional cleaning restores light penetration and system efficiency.
⚡ Battery Upgrades & Hybrid Conversions
Integrate Sigenergy, Tesla, Sungrow, Alpha ESS
Store your solar energy and achieve true energy independence. We seamlessly integrate batteries with existing systems.
📈 System Expansion & Re-Stringing
Need more power? We add capacity correctly, following AS/NZS 3008 cable sizing rules to ensure safety and performance.
🔍 Fault Diagnosis & Compliance Audits
We don’t guess. We use thermal imaging, insulation testers, and data logging to find the root cause of any problem.
📱 Monitoring, CTs & EMS Tuning
Frustrated with incorrect app data? We fix CT clamp issues, configure monitoring, and tune your Energy Management System for optimal savings.
Our Unwavering Commitment to Safety & Standards
When we work on your home, we pledge to uphold the highest Australian safety and quality standards. This isn’t just about rules—it’s about protecting your home, your family, and your warranty.
- AS/NZS 3000 & 5033: Electrical safety and PV array installation. Prevents fire and electrical hazards.
- AS/NZS 4777.2: Grid connection compliance. Ensures your system doesn’t fault due to grid volatility.
- AS/NZS 5139: Battery installation safety. Critical for safely storing large amounts of energy.
- Local DNSP Rules: Compliance with Ausgrid, Endeavour Energy, and Essential Energy. Avoids export limiting and disconnection.
Your peace of mind is our highest standard.
Your Hassle-Free Journey to Reliable Solar
We believe in a transparent, structured process so you know exactly what to expect from start to finish.
Phase 1: Consultation & Planning
- Initial Consultation: We discuss your issues and goals.
- Remote Data Analysis: We analyse your system’s performance history.
- Site Review: A technician assesses your roof, switchboard, and equipment.
Phase 2: Engineering & Preparation
- System Design & Quote: We provide a detailed plan and fixed-price quote.
- Engineering & Approvals: We handle all paperwork for DNSP approvals if needed.
- Procurement: We source all CEC-approved equipment.
Phase 3: Execution & Handover
- Professional Installation: Our CEC-accredited technicians perform the work.
- Standards-Compliant Commissioning: We test and configure everything to spec.
- Metering & Connection: We ensure everything is talking to the grid correctly.
- Complete Handover: We walk you through your new monitoring and provide all warranties.
Real Results: How We Fixed a Throttled 6.6kW System
The Problem: A family in St Ives was frustrated their 6.6kW system was producing less than 10kWh on a sunny day. Their inverter seemed to ‘switch off’ at midday.
Our Investigation: Our diagnosis revealed a triple threat:
- Export Limiting: An incorrect DNSP profile had locked the export limit to 0kW.
- Dirty Panels: Significant grime buildup was reducing efficiency by ~15%.
- CT Reversal: The consumption monitor was installed backwards, showing negative values.
The Solution: We corrected the DNSP settings, performed a professional panel clean, and reinstalled the CT clamps. We also updated the inverter firmware.
The Result:
“Immediate increase to expected 28-32kWh daily production. The system now runs smoothly without throttling, and the app finally makes sense!” – Satisfied Customer
Troubleshooting Library
Fronius
- State 457/475 — Grid voltage too high
- State 301 — Isolation resistance low
- State 567 — DC current imbalance
Sungrow
- Error 117 — DC insulation fault
- Error 102 — Grid voltage mismatch
- Error 125 — Grid frequency error
SolarEdge
- Alert 18x — Optimiser mismatch
- Alert 21x — String voltage mismatch
- Alert 33x — DC arc fault
Enphase
- Envoy offline — Network disconnected
- CT reversed — Consumption incorrect
- Microinverter thermal limit reached
Other Common Issues
- Tesla Gateway offline
- Sungrow battery not charging
- Export limit showing 0 kW
- Grid voltage rise during peak
- Corroded rooftop isolators
Restore, upgrade, and future-proof your solar system today.
CEC-accredited team • Local to St Ives • Fast fixes for solar system not working Sydney
1800 961 695
Service@hilts.com.au
Our Proven 10-Step Solar Process
From initial consultation to final handover, we ensure a seamless transition to solar energy with our comprehensive approach
Consultation & Bill Review
We analyze your energy consumption and discuss your solar goals to create a customized solution.
Load Profiling & Solar Sizing
We determine the optimal system size for your energy needs and future consumption patterns.
3D Shading Design
We model sun path and shading throughout the year to maximize solar exposure and efficiency.
Engineering Pack
Our engineers create detailed system designs, electrical diagrams, and installation plans.
DNSP & Rebate Paperwork
We handle all permits, grid approvals, and incentive applications on your behalf.
Premium Equipment Procurement
We source top-tier solar panels, inverters, and batteries from trusted manufacturers.
Site Prep & Safety Setup
We prepare your site with all necessary safety measures and equipment staging.
Installation
Our certified technicians install panels, inverter, and battery with precision and care.
Testing & Commissioning
We thoroughly test the system to ensure optimal performance and safety compliance.
Monitoring Setup & Handover
We set up monitoring and provide complete system training for your peace of mind.
Trust
Premium Solar Brands We Trust
Trust
Solar Inverters Built for Scale
We power our commercial systems with inverters that handle complex loads and multi-roof sites
Frequently Asked Questions
Got questions about our services? We’ve answered the most common ones below to help you make informed decisions with confidence.