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26 guides: 550+ documented inverter fault codes across 15 brands, plus deep-dive technology explainers. All compiled from published documentation, all free.
Searchable error and alarm-code references, each compiled from manufacturer documentation and written in plain English.
Search all fault codesInverter Fault Library
Major and minor alarm codes for Huawei SUN2000 residential and commercial inverters, with plain-English causes and field-tested fixes.
Inverter Fault Library
The complete Sungrow fault reference — string, SH hybrid and battery families — with every alarm number searchable and grouped by root cause.
Inverter Fault Library
Solis (Ginlong) inverter alarm codes covering grid, insulation, temperature and hardware faults, with diagnostic next steps.
Inverter Fault Library
Growatt's dual numbered-and-named error scheme decoded — what each Error and Warning means, and whether it needs an installer.
Inverter Fault Library
GoodWe inverter error codes for grid, isolation, temperature and internal faults, with clear guidance on self-recovery versus service.
Inverter Fault Library
Common Fronius State codes — including the Australian Volt-Watt and Volt-VAr grid-protection states — explained for owners and installers.
Inverter Fault Library
Frequent SMA Sunny Boy and Tripower event codes, what triggers them, and the difference between a momentary grid event and a real fault.
Inverter Fault Library
Plain-English guide to the events Enphase IQ microinverters report in the app — grid, DC, temperature and reporting — and what each one means.
Inverter Fault Library
Common SolaX string and hybrid inverter fault codes explained, with likely causes and what to check.
Inverter Fault Library
Common Deye string and hybrid inverter fault codes decoded, with plain-English causes and fixes.
Battery Alert Library
What Tesla Powerwall's app alerts mean — from Breaker Open to Storm Watch — explained in plain English.
System Fault Library
Common SigenStor alarms (the 1000-series inverter codes) explained, with what each points to and what to check.
Inverter Fault Library
FoxESS hybrid (H1/AC1) named alarms and R-series numeric fault codes in plain English — what each means and what to check.
Inverter Fault Library
Sofar Solar inverter ID fault codes (the ID01–ID107 range) decoded, with documented causes, fixes and a note on model-specific numbering.
Microinverter Fault Library
Hoymiles microinverter alarm and event codes — grid, protection and DTU faults — explained, with what each points to and what to check.
The science and engineering behind modern solar — explained for owners, buyers and installers alike.
Cell Technology
How heterojunction cells fuse crystalline and thin-film silicon to push efficiency higher — and what that means for real-world yield.
Cell Architecture
Why busbar count keeps rising — from 5BB to MBB and beyond — and how finer conductors cut resistive loss and improve reliability.
System Design
String inverters, microinverters and DC optimisers compared — where the conversion happens and which architecture fits your roof.
System Design
How azimuth and tilt shape annual yield and self-consumption — and why the textbook-optimal angle is rarely the smartest one.
Buyer's Guide
Decode STC vs NOCT, temperature coefficients, tolerance and degradation so you can compare modules on the numbers that matter.
Cell Technology
What TOPCon (Tunnel Oxide Passivated Contact) cells are, how the passivating contact works, and how they compare with PERC and HJT on efficiency, temperature, bifaciality, degradation and cost.
Panel Technology
How bifacial modules capture rear-side light, what bifaciality factor and albedo mean, and why ground-mount arrays gain far more than typical rooftops.
Battery Technology
A plain-English, manufacturer-neutral comparison of LFP and NMC lithium battery chemistries for home storage, covering energy density, cycle life, safety, temperature behaviour, cost, and why most new home batteries now use LFP.
Grid & Connection
What export limits are, why Australian networks apply them, the move from fixed and zero limits to dynamic exports, and how it all shapes system sizing and self-consumption.
Energy Markets
What a virtual power plant is, how aggregated home batteries earn money providing grid services, and the real trade-offs for owners — in plain Australian English.
System Design
How microinverters and string inverters differ on shade tolerance, monitoring, redundancy, cost and roof complexity — and which suits your site.