Siemens SINVERT Solar MASTER SOLAR_PRJ_1000 MS TL-500kW Central Photovoltaic Inverter – Transformerless – MASTER Unit for 1000kW System with 500kW SLAVE – Part No. A5E03360675

Used product. The Siemens SINVERT Solar MASTER is an industrial central photovoltaic inverter unit belonging to a modular MASTER/SLAVE configuration designed for large-scale photovoltaic power plants. A fundamental point for correct identification is the designation shown on the label: SOLAR_PRJ_1000 MS TL “SOLAR_PRJ_1000 MS TL” identifies the complete 1000kW project/system configuration, consisting of an approximately 500kW MASTER section and an approximately 500kW SLAVE section. The MASTER manages its own power conversion stage and also performs the control and coordination functions of the SLAVE unit; together, the two sections form the complete 1MW photovoltaic inverter system. This designation should not be interpreted as an individual 1000kW rating for the MASTER cabinet alone. In the photographed system, the configuration consists of two coordinated units: MASTER Unit: approximately 500kW SLAVE Unit: approximately 500kW Total MASTER + SLAVE system power: approximately 1000kW / 1MW The MASTER section represents the main unit of the system and performs photovoltaic power conversion, operational control, operating sequence management, diagnostics and coordination of the associated configuration. The SLAVE section, also rated at approximately 500kW, forms the second power unit and operates in coordination with the MASTER. In this architecture, the value 1000 shown in the project designation identifies the overall power class of the combined inverter system, rather than the standalone power rating of the individual MASTER unit. The MS designation is consistent with a Master/Slave configuration, while TL indicates a Transformerless solution, meaning that no isolation transformer is integrated into the inverter section. ⚙️ Main Features Siemens central photovoltaic inverter Main MASTER unit MASTER unit power: approximately 500kW Designed for coordination with an approximately 500kW SLAVE unit Total MASTER + SLAVE configuration power: approximately 1000kW / 1MW Modular Master/Slave architecture Transformerless / TL technology Industrial and utility-scale application Multi-cabinet system Centralized configuration control Industrial forced-air cooling Siemens power electronics Integrated diagnostics and protection functions 📋 Technical Specifications Brand: Siemens Product Range: SINVERT Solar Configuration: MASTER / SLAVE Unit Described: MASTER Visible Part Number: A5E03360675 Label Designation: SOLAR_PRJ_1000 MS TL Visible MASTER Reference: 102443326 Order Reference: 3458898 / 000070 Indicative MASTER Unit Power: approximately 500kW Indicative Associated SLAVE Unit Power: approximately 500kW Total Configuration Power: approximately 1000kW / 1MW Topology: Transformerless / TL Control Architecture: Master/Slave Number of MPPTs: to be verified against the exact technical documentation for this configuration; it should not be stated as “1 MPPT” without confirmed evidence Application: Large-scale industrial photovoltaic systems Visible Label Date: 31.01.2011 🔄 MASTER / SLAVE Configuration Operation The operating principle can be described as follows: The MASTER is an approximately 500kW power inverter that also acts as the main management unit. When connected to the corresponding approximately 500kW SLAVE unit, the system reaches a total power of approximately: 500kW MASTER + 500kW SLAVE = 1000kW / 1MW This configuration distributes energy conversion across two coordinated power sections instead of concentrating the entire 1MW capacity in a single independent inverter unit. The MASTER can manage and coordinate operational aspects of the configuration, while the SLAVE contributes its own conversion section to the total available system power. 🔧 Difference Between MASTER and SLAVE MASTER Indicative Power: approximately 500kW Main unit of the configuration Operational management and coordination Conversion of its own share of power Main control interface System diagnostics Coordination with the SLAVE unit SLAVE Indicative Power: approximately 500kW Associated secondary unit Conversion of its own share of power Coordinated operation with the MASTER Contribution to total system power Complete System MASTER 500kW + SLAVE 500kW Total Power: approximately 1000kW / 1MW ⚡ Internal Siemens SBM Solar Module The photographs also identify an internal Siemens module with the following data: Brand: Siemens Series: SBM SOLAR Order Number: A5E02556717 Factory / Serial Number: F2B1004600 Maximum Current Imax: 1025A Trigger Threshold Von: 820V Input Voltage Vin: DC 510–650V Pulse Power: 840kW Minimum Resistance: 0.8 Ohm -8% Revision: Issue A Manufactured in: Germany It is important to specify that the 840kW value refers to the Pulse Power parameter of the SBM Solar module and does not represent the nominal AC output power of the individual MASTER inverter. ⚠️ Possible Errors and Fault Conditions The system may experience faults related to: Overcurrent Overload Overtemperature MASTER-SLAVE communication error SLAVE unavailable Synchronization error between units DC voltage anomaly Photovoltaic field insulation fault Grid voltage outside permitted limits Grid frequency outside permitted limits Power module fault Cooling or ventilation fault Contactor fault Auxiliary circuit fault Thermal shutdown Control electronics fault 🔌 Compatibility Suitable for: Large photovoltaic power plants Utility-scale installations Siemens SINVERT Solar configurations MASTER/SLAVE systems Photovoltaic plant revamping Replacement of compatible units Recovery of Siemens industrial spare parts 📦 Product Condition Used central inverter MASTER unit Cosmetic condition as shown in the photographs Signs of use and storage Surface dust and dirt present Identification labels visible Internal completeness to be verified Operation to be verified through professional testing Recommended for sale as a used industrial unit, replacement part or component for a compatible system