5 Must-Have Features in a High-performance AC coupled inverter

5 Must-Have Features in a High-performance AC coupled inverter

Established in 2007, Deye has been a leading provider of energy solutions through our quality products and good service. The cumulative shipments of Deye hybrid inverters have reached 800,000 by 2023, showing the world a testament to our commitment to renewable energy solutions.

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Deye Three Phase hybrid inverter series presents a comprehensive solution tailored to meet the diverse energy needs of residential, commercial, and industrial consumers. Among all the products, Deye 50kW Three Phase Hybrid Inverter boasts several key advantages that set it apart in the market.

1. High Efficiency with Maximum Voltage

The Deye 50kW Three Phase Hybrid Inverter is equipped with lithium-ion batteries that have a maximum voltage of 800V. This elevated voltage not only enhances energy conversion efficiency but also ensures a longer battery lifespan. Users can expect optimal performance and significant energy savings over time. Its compact volume and high energy density allow for prolonged power supply durations.

2. High Capacity for Faster Charging/Discharging

Featuring two battery inputs, each capable of handling a maximum charging/discharging current of 50A, the inverter ensures efficient energy transfer. This design facilitates quicker cycles, optimizing system performance and maximizing energy utilization.

3. Enhanced Energy Production with MPPT

The inverter includes up to four MPP trackers with a maximum operating input current of 36A per MPPT. This configuration ensures the maximization of energy production by efficiently tracking available solar energy, even in variable sunlight conditions. The four MPP trackers also offer flexible configurations for PV modules.

4. Scalability and Integration

Supporting up to 10 parallel units for both on-grid and off-grid operations, this inverter offers unmatched scalability. It integrates seamlessly with multiple batteries in parallel, making it versatile for growing energy needs. This feature is especially beneficial for large commercial and industrial (C&I) scenarios.

5. Programmable Time Periods for Efficient Energy Management

Six programmable time periods for battery charging and discharging allow users to align energy storage and usage with specific consumption patterns. This customization optimizes energy management, helping users save on energy costs.

The inverter also features UPS-level grid-to-off-grid switching, ensuring an uninterrupted power supply during sudden grid outages. The AC coupling capability fosters greater system flexibility, enabling easy expansion and maintenance without substantial system redesigns.

In conclusion, for more information on a High-performance AC coupled inverter, contact us today! Whether it's pairing with diesel generators for improved power stability or ensuring real-time monitoring online, the Deye 50kW Three Phase Hybrid Inverter stands out as a top choice.

AC-Coupled vs. DC-Coupled Battery Systems

You may not get the same adrenaline rush as attending a rock concert, but maintaining power during an outage can give you peace of mind. Understanding the different ways your battery can be wired is essential when adding battery storage to an existing system or installing a new one.

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Whether adding battery storage or combining it with solar panels, your home's solar photovoltaic (PV) system generates energy in the form of direct current (DC). Still, home appliances work with alternating current (AC).

Solar inverters convert DC power to AC before sending it through your breaker box to your home. However, solar batteries store DC electricity, meaning any energy must be in DC form to be deposited in your storage system, and there are two ways to connect your panels to the battery:

DC-Coupling

Directly interacts with the DC power behind your inverter.

AC-Coupling

Uses separate inverters for your battery and solar panels, with electricity traveling between them in AC form.

To learn more about how a solar battery works, click here.

AC-Coupled vs. DC-Coupled Batteries

AC electricity flows both ways, while DC electricity flows one way. Solar is primarily used to power your home in both systems, with any excess sent to the battery. The main difference is whether the energy your PV system generates is inverted before or after being stored in your battery.

In the past, AC-coupled batteries were mainly used for residential solar systems, while DC-coupled batteries were used for off-grid installations. Advances in technology have now made both setups widely available for grid-tied systems. Each has benefits and downsides.

AC-Coupled Batteries for Home Solar

With AC-coupled systems, one inverter is for the solar PV system, and another is for the battery. Energy from your panels flows as DC power through your solar inverter, converting it to AC power for use in your home appliances or being sent to the grid. Any excess energy destined for the battery goes through a multi-mode or bi-directional inverter for storage.

AC-coupled storage is flexible, allowing easy addition of more devices, but this means stored solar power undergoes three conversions before usage.

Pros and Cons of AC-Coupled Systems

• Retrofitting capabilities: Easy to install on an existing PV system and add more storage capacity later.
• Flexibility: Works with any type of inverter.
• Versatility: Charges from both PV and the grid.
• Grid services: Better for demand response programs where utilities control the flow of your energy.

• Efficiency losses: Multiple electricity conversions lower efficiency.
• Additional equipment: Requires a second inverter and other equipment, increasing costs.
• Power limitations: Not all AC-coupled systems work without grid access, requiring large transformers for off-grid uses.

AC-coupled systems allow PV and battery systems to discharge to the grid, which can be lucrative in areas with net metering credits for exported solar. This setup helps maximize credits when utility export rates are highest.

DC-Coupled Batteries for Home Solar

DC-coupled systems have two configurations: basic for off-grid systems and hybrid for grid-connected systems backing up critical loads. Basic systems use a charge controller between panels and battery, while hybrid systems use modern hybrid inverters with high-voltage MPPT controllers to ensure maximum power production.

DC-coupled systems involve only one inversion of power from DC to AC, making them more efficient but require specialized DC wiring, which can increase costs.

Standard DC-Coupled System

Energy from your panels flows as DC power through a charge controller directly to your battery. When used, the DC power goes through a battery inverter to convert to AC power for your home or the grid.

DC-Coupled System with Hybrid Inverter

Energy from your panels flows as DC power to a hybrid inverter, which either stores it in the battery or converts it to AC power for use. During an outage, the AC power can flow from the hybrid inverter to power critical loads.

Pros and Cons of DC-Coupled Systems

• Higher efficiency: Only one power conversion maximizes efficiency.
• Lower cost: Requires just one inverter and less equipment, reducing upfront costs.
• Oversizing capabilities: Enables panels to generate more electricity than peak inverter rating, with the excess stored directly in the battery.

• Limited flexibility: Challenging installation and configuration with existing PV systems.
• Less resiliency: Single inverter must be installed closer to the battery, making systems more susceptible to failure during outages.
• Grid services: May not qualify for financially rewarding demand response programs.

Choosing AC Coupling or DC Coupling

If you already have solar panels and want to add battery storage, you'll typically opt for AC-coupling, as you'll likely already have a solar inverter installed. If installing solar and battery storage simultaneously, DC coupling may be the better choice due to higher efficiency and lower cost, with less wiring and fewer failure points.

Installing battery storage maximizes the value of your solar PV system and provides protection during grid outages. You can even enjoy live AC/DC concerts during an outage, thanks to your AC/DC-coupled battery storage.

Ready to get started? Find out which system is best for your home.

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