Documentation Index
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HuaBook
The complete technical reference for Huawei SUN2000 solar inverters — covering log diagnostics, Modbus register maps, and O&M strategies.
Log diagnostics
Understand every EMAP log file your inverter records — from daily heartbeat data to fault oscillography.
Modbus referenceFull register map, FC 0x41 file transfer protocol, ESS registers, and connection methods.
O&M guidePreventive maintenance workflows, efficiency analysis, and legal dispute guidance.
Common tasks
Monitor daily generationUse his_inv_rd and perfmg_data logs to track energy yield and spot underperforming strings.
Investigate a faultRead alarm history and DSP waveform data to diagnose trips and shutdowns.
Look up a registerFind addresses, data types, and gain factors for DC, AC, and energy registers.
Run a site visitFollow the step-by-step O&M checklist for scheduled maintenance visits.
Connect via ModbusCompare RS485, Modbus TCP, SDongle, and SmartLogger connection options.
Decode an error codeLook up fault codes, causes, and recommended corrective actions.