Medha’s 1.25 MW solar inverters are engineered to provide exceptional efficiency and reliability for medium-scale solar power installations. These inverters are designed to optimize performance and energy yield, ensuring robust and consistent operation.

Smart User Interface

The inverter features a 128 x 64 dot matrix interactive display for user data configuration and fault monitoring. Data can be downloaded via USB or Ethernet using PC-based application software. The system supports Ethernet/SCADA for web-based monitoring and stores 30 days of internal memory data and fault information with associated data packs for any triggered event.

Advanced Technology

Medha’s 1.25 MW inverters utilize advanced three-level technology to achieve the highest efficiency over a wide operational range. Key technological features include:

1. Configurable Reactive and Power Factor Adjustment: Ensures compliance with grid requirements.
2. Grid Side Fault Monitoring and Support: Includes LVRT, HVRT, anti-islanding, reactive power control, and power factor regulation.
3. Integrated Grid Side Lower Harmonic Control Algorithm: Improves power quality and system stability.

High Yield

The inverter achieves a maximum efficiency of 98.9% with Euro/CEC efficiency of 98.71% / 98.76%. It operates efficiently across a wide temperature range and provides 110% higher operating power at lower ambient temperatures. The optimized cooling fan control enhances energy savings and extends fan life.

Key Features

1. DC Insulation Monitoring and Protection: Ensures system safety and reliability.
2. Low Harmonic Current Output: Minimizes electrical noise and enhances power quality.
3. Input and Output Isolation: Automatic control of contactor and ACB through a control computer for safe operation.
4. Automatic Wake-Up and Sleep Mode: Improves operational efficiency and reduces energy consumption.

Comprehensive Protections

Medha’s 1.25 MW inverters are equipped with extensive protection features to ensure safe and reliable operation:

1. Grid Protection: Anti-islanding, over/under voltage, over/under frequency, and loss of synchronization protection.
2. DC Side Protection: DC reverse polarity, overcurrent, and overvoltage protection.
3. AC Side Protection: Short-circuit, overload, and surge protection.
4. Thermal Protection: Overtemperature and cooling failure protection.
5. Ground Fault Protection: Monitors and protects against ground faults.
6. Monitoring and Diagnostics: Real-time monitoring of key parameters and fault detection.

Compliance and Standards

Medha’s 1.25 MW inverters meet international standards for high performance and safety:

1. Efficiency Measurements: IEC 61683
2. Environmental Testing: IEC 60068 series
3. Electromagnetic Compatibility (EMC): IEC 61000 series
4. Electrical Safety: IEC 62109 series
5. Protection Against Islanding: IEC 62116 and IEEE 1547
6. PV Systems Utility Interface: IEC 61727

Operating Performance

1. Maximum Efficiency: 98.9% (excluding auxiliary supply)
2. Weighted Efficiency (EURO/CEC): 98.71% / 98.76%
3. MPPT Efficiency: 99.99%
4. Auxiliary Supply Consumption: <2900 W
5. Night Mode Power Consumption: <100 W
6. No Load Losses: <1650 W

Medha’s 1.25 MW solar inverters are designed to deliver superior performance, reliability, and efficiency, making them an excellent choice for medium-scale solar power projects.