# HuaBook

> The complete technical reference for Huawei SUN2000 solar inverters — logs, Modbus registers, and O&M strategies.

## Docs

- [HuaBook: SUN2000 Log & Diagnostics Reference](https://fop-50527c4b.mintlify.app/introduction.md): A technical reference for Huawei SUN2000 solar inverters covering EMAP log files, Modbus registers, the FC 0x41 protocol, and O&M strategies.
- [SUN2000 V2 vs V3: Generations Compared](https://fop-50527c4b.mintlify.app/inverter-generations.md): Compare Huawei SUN2000 V2 Classic and V3 Smart generations: connectivity, ESS support, AFCI protection, and what each means for diagnostics.
- [Communication and Audit Logs](https://fop-50527c4b.mintlify.app/logs/communication-audit.md): Audit user access, diagnose power-line communication noise, investigate ARM system events, and verify protection settings with SUN2000 communication logs.
- [Daily Monitoring Logs: his_inv_rd and perfmg_data](https://fop-50527c4b.mintlify.app/logs/daily-monitoring.md): Use his_inv_rd and perfmg_data to track string performance, heatsink temperature, insulation resistance, and cumulative energy yield daily.
- [Fault Investigation Logs: Alarms and Waveforms](https://fop-50527c4b.mintlify.app/logs/fault-investigation.md): Use alarmg_history, dsp_wave_data, and dsp_freq_data to investigate faults, distinguish failure causes, and support warranty claims or legal disputes.
- [Hardware Health Logs: Panels, Fans, and Capacitors](https://fop-50527c4b.mintlify.app/logs/hardware-health.md): Monitor IV curves, fan motor hours, DC bus capacitor ESR, and per-optimizer statistics to catch hardware degradation before it becomes a failure.
- [Understanding Huawei SUN2000 Log Files](https://fop-50527c4b.mintlify.app/logs/overview.md): Learn how Huawei SUN2000 inverters record, store, and manage binary EMAP log files, and when to export them before data is overwritten.
- [Connecting to Huawei SUN2000 via Modbus](https://fop-50527c4b.mintlify.app/modbus/connection-methods.md): Compare RS-485, SDongle TCP, Wi-Fi AP, and SmartLogger connection options for Huawei SUN2000 inverters, including the FC 0x41 log file transfer protocol.
- [LUNA2000 Battery (ESS) Registers for V3 Inverters](https://fop-50527c4b.mintlify.app/modbus/ess-registers.md): Modbus register reference for LUNA2000 energy storage on Huawei SUN2000 V3 inverters: SOC, charge/discharge power, voltage, and accumulated energy.
- [Modbus Protocol for Huawei SUN2000 Inverters](https://fop-50527c4b.mintlify.app/modbus/overview.md): SUN2000 Modbus primer: byte order, UINT16/INT32 data types, gain scaling, FC 03/04 register reads, and the proprietary FC 0x41 log transfer function.
- [SUN2000 Modbus Register Map: V2 and V3](https://fop-50527c4b.mintlify.app/modbus/register-map.md): Complete Modbus register reference for Huawei SUN2000 inverters: system info, DC, AC, energy, temperature, and inverter state decode table.
- [Analyzing Solar Plant Efficiency with Inverter Logs](https://fop-50527c4b.mintlify.app/om/efficiency-analysis.md): Find lost kWh using SUN2000 inverter logs: IV curve analysis, string degradation detection, energy benchmarking, and FusionSolar AI comparison.
- [Using Inverter Logs for Legal and Insurance Claims](https://fop-50527c4b.mintlify.app/om/legal-protection.md): Use SUN2000 inverter logs as tamper-proof evidence for grid overvoltage claims, power curtailment compensation, warranty disputes, and access audits.
- [Preventive Maintenance for Huawei SUN2000](https://fop-50527c4b.mintlify.app/om/preventive-maintenance.md): Use inverter log data to predict and prevent failures months in advance, covering fan replacement, capacitor monitoring, and condition-based maintenance.
- [O&M Site Visit Checklist for SUN2000 Inverters](https://fop-50527c4b.mintlify.app/om/visit-checklist.md): A step-by-step O&M site visit checklist for Huawei SUN2000 inverters covering log export, insulation checks, IV curves, and hardware health review.
- [Huawei SUN2000 Error Code Reference](https://fop-50527c4b.mintlify.app/reference/error-codes.md): Complete reference for Huawei SUN2000 error codes, including causes, corrective actions, and how to locate alerts in FusionSolar and alarmg_history logs.
- [AI and Predictive Diagnostics for Solar Plants](https://fop-50527c4b.mintlify.app/reference/future-diagnostics.md): How Huawei SUN2000 EMAP logs power AI-driven arc protection, predictive maintenance, and cloud-scale benchmarking through the FusionSolar platform.
- [Glossary: Huawei SUN2000 Terms and Acronyms](https://fop-50527c4b.mintlify.app/reference/glossary.md): Definitions for technical terms, acronyms, log file names, and Modbus concepts used across Huawei SUN2000 inverter documentation and diagnostics.