Copy of Mastering Power Flexibility: Renac N1 LV Hybrid Inverter's Parallel Connection and Seamless Grid Switching

Renac N1 LV series is a new type of solar energy storage inverter control inverter integrating solar energy storage& utility charging and energy storage, Ac sine wave output. lt adopts DSP control and features high response speed, reliability, and industrial standard through an advanced control algorithm.

Key Features:

· Battery Compatibility: Supports both lead-acid and Li-ion batteries.

· Dual Activation Function: For Li-ion batteries, either mains or photovoltaic power supply can trigger activation when the battery is dormant.

· Dual MPPT: Provides up to 99.9% efficiency with a maximum 16A current per circuit, ideal for high-power modules.

· Time-Slot Charging/Discharging: Set specific time periods for grid charging and battery discharge, with an option for mains bypass during discharge.

· Communication Options: Supports CAN, USB, and RS485 for communication.

· Generator Compatibility: Allows backup power extension through generator integration.

· Parallel Connection: Up to 6 units can be connected in parallel for greater capacity.

· Fast Switching: <10ms transfer time for seamless transitions.

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Application scenarios：

1. Self-Consumption with Energy Storage:?Solar power generated during the day supplies the home, and excess energy is stored in batteries for use at night or on cloudy days.

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2. Time-of-Use Optimization: The inverter charges the battery from the grid during off-peak hours and discharges during peak hours, reducing electricity costs.

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3. Off-Grid or Micro grid Supply: Provides reliable power in remote areas without grid access, combining solar power and storage to form an independent energy system.

Master-Slave Control：

One inverter acts as the Master?and the others as Slaves. The Master inverter sets the reference for voltage, frequency, and phase, while the Slave inverters follow its output to achieve synchronized operation.

Master Inverter:

Generates the reference signals for voltage, frequency, and phase.

Acts as the central controller, ensuring stable system operation.

Slave Inverters:

Follow the Master’s reference signals by adjusting their output to match the Master’s voltage, frequency, and phase.

Do not independently control the output but rely entirely on the Master’s signals.

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Parallel connection:

1. Parallel connection for single phase

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2. Three units connected in three phase:

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Switching Principle of Grid-Tied and Off-Grid Modes

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Grid Monitoring:

The inverter continuously monitors grid voltage, frequency, and phase using voltage and frequency sensors. If grid abnormalities (e.g., voltage drop, frequency deviation, or outage) are detected, the inverter initiates the switching process.

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Control Logic for Switching:

1. Normal grid operation:?The system operates in grid-tied mode, synchronizing with the grid.
2. Grid failure: The inverter transitions to off-grid mode, typically within 20 milliseconds to several hundred milliseconds.

Off-Grid Operation:

In off-grid mode, the inverter provides stable voltage and frequency, acting as a mini power plant.

Energy is supplied by the battery storage or PV system to sustain critical loads.

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Grid Reconnection:

When the grid is restored, the inverter rechecks grid parameters and synchronizes gradually.

Once synchronization is confirmed, the inverter switches back to grid-tied mode seamlessly.

Conclusion:

Renac LV hybrid inverter paired with a solar energy storage system is an excellent solution. It ensures that you have off-grid, on-grid, energy storage all at the same time, so even during a power outage, you always have power at your fingertips. We offer a wide range of applications, including energy optimization, backup power, and smart home integration. Selecting the right system based on specific needs can significantly enhance energy efficiency, reliability, and cost-effectiveness in residential settings

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The additional features of the Renac N1 LV hybrid inverter will be explored in more detail in the next issue. Stay tuned and don't forget to subscribe!