|
Quantity
|
Total
|
||
|
|
|||
|
|
|||
Deye hybrid inverters of the SUN series are designed for backup and autonomous power supply systems with support for the grid, photovoltaic modules and batteries. These devices combine the functions of an inverter, a charger and an energy flow management system. Deye are compatible with lithium-ion and lead-acid batteries, support uninterruptible power supply (EPS) mode and are equipped with Wi-Fi/RS485/Can interfaces for monitoring. Reliable system operation requires periodic full diagnostics, especially when using the inverter as a critical power source.
What diagnostics include
Inspection / audit
- Visual inspection of the inverter, batteries, switching equipment and circuit breakers.
- Checking the tightness of the case, the condition of the fans (in appropriate models), AC/DC connectors.
- Analysis of installation conditions: cooling, dust, humidity, surge protection.
- Fixing the firmware, phase configuration, operating mode (On-grid / EPS / Off-grid).
Electrical tests
- Measurement of voltage and frequency at the AC input (mains or generator) and the EPS/AC-out output.
- Testing switching between the network and the backup output (including response time).
- Assessment of the quality of the sinusoidal signal, the presence of harmonics, voltage sags or surges.
- Control of the current load on each phase (for three-phase models).
Inverter, charge, bypass
- Checking the efficiency of the inverter under load in different modes (network, battery, sun).
- Testing the operation of the charging module, reading the active charge current, compliance with the battery type.
- Assessment of operation in EPS mode (autonomy, voltage stability, support for starting loads).
- Analysis of the operation of the internal bypass and protections (overload, overvoltage, short circuit).
Battery (battery system)
- Reading battery parameters via the CAN interface or RS485 (e.g. for Pylontech, SOK, Huber+Suhner).
- Analysis of SOC/SOH status, cell balance, voltage, temperature, cyclicity.
- Checking the system response to deep discharge, PV or grid charge.
- Detecting BMS communication errors or configuration desynchronization.
Cooling
- Evaluation of temperature profiles under load.
- Testing the operation of active cooling (fans) or passive (radiator).
- Fixing thermal trips, overloads, overheating accidents in logs.
Communications / monitoring
- Checking communication with Wi-Fi / LAN / 4G module, stability of access to Solarman or local interface.
- Reading error logs, warnings, event logs.
- Control of integration with monitoring and logging systems via RS485, CAN or USB.
- Evaluation of the possibility of firmware updates and remote access to settings.
Technical report
- Generation of a report with all operating parameters: voltage, frequency, SOC, event log.
- Identified deviations, communication errors, warnings from the inverter or BMS.
- Recommendations for firmware updates, mode optimization or battery replacement.
When diagnostics are required
- Annually or before switching to backup power mode for a long period.
- After inverter error messages appear, load disconnection or BMS.
- Before configuration update (battery replacement, generator integration, PV expansion).
- After deep battery discharge, unexpected system shutdown or long downtime.
Why choose Total-Energo LLC
- Experience in diagnosing hybrid systems based on Deye (SUN-5K, 8K, 10K, three-phase models, etc.).
- Compatible diagnostic software, system maintenance with Pylontech, SOK, LiFePO₄, Lead-Acid batteries.
- Possibility of on-site visit or remote access via the cloud.
- Technical report with explanations, recommendations for optimizing settings and safety of operation.