How Does Hybrid Inverter Distribute Load Power Across Dual AC Output?

Previously, we shared an article about how to allocate load power in split phase inverter with dual voltage output. This time, I'll introduce how to allocate load power in Xindun hybrid inverter with dual AC output.

What is dual AC output hybrid inverter? Simply put, it is hybrid inverter with dual AC load output, where the main output and the second output can both drive loads simultaneously or independently.

So how does the dual AC output of hybrid inverter distribute the load power?

Taking the Xindun HFP-C dual AC output hybrid inverter as example, this inverter features intelligent dual AC output functionality. Under normal use and without this function enabled, the total load power of both outputs must not exceed the inverter's rated power, and there is no single output power limit. The two output can be freely allocated; whether the main output is carrying load alone, the second output is carrying load alone, or both output are carrying loads simultaneously, as long as the power of each output and the total load power of both outputs do not exceed the inverter's rated total power, the inverter will operate normally.

Dual channel operation: Main circuit load power + Second circuit load power ≤ Total rated power of the inverter

Single channel operation: Main circuit load power ≤ Total rated power of the inverter

Single channel operation: Second circuit load power ≤ Total rated power of the inverter

When the intelligent dual AC output function is enabled, the power distribution will change according to the battery voltage or SOC (remaining power). When the battery voltage is normal, it is the same as when the function is not enabled.

If the battery voltage is too low, it will drop to the output shutdown voltage setting (lead-acid battery) or drop to the SOC output shutdown voltage setting (lithium battery).

For example, for 48V lead-acid battery, within the settable voltage range of 28V-58V, a cutoff voltage of 35V can be set, and the battery voltage is ≤35V when set.

When configuring lithium battery, within the settable range of 5%-95%, set 15% SOC output shutdown value when the battery charge is ≤15% of the set value.

The main output will automatically shut down and cannot be loaded. Only the second output continues to supply power and carry a load, and the maximum power of the second output is limited to 30% of the inverter's rated power. Taking the HFP-C hybrid inverter with power of 10.3KW as example, at this time, the load power of the second output is ≤3090W, and the maximum load power is 3090W.

When the battery is charged to the output switch and the set value is restored, and the AC power is connected, the main output automatically resumes power supply, and the total power limit of the two outputs is restored to ≤ the rated total power of the inverter.

For example, for 48V lead-acid battery, within the settable voltage range of 28V-58V, a recovery voltage value of 40V can be set. When the battery voltage is ≥40V, power supply is restored.

When configuring lithium battery, within the settable range of 10%-99%, set 80% SOC output recovery value. When the battery charge is ≥80% of the set value, power supply will be restored.

The power can be freely allocated between the two circuits without exceeding the rated total power. However, when actually wiring, attention should be paid to the physical load bearing capacity of the terminals and cables, as well as the type of load (such as motor loads whose power will surge when starting) to avoid tripping due to excessive power at startup.

In what scenarios would you use the intelligent dual AC output function?

The intelligent dual AC output function is primarily used in scenarios where battery capacity is limited, but it is necessary to prioritize ensuring uninterrupted power to certain critical devices. The core value of this function lies in its ability to automatically cut off unnecessary loads when the battery is low, concentrating the remaining power to supply the most important devices, thereby extending the operating time of critical equipment.

In home setting, battery power is limited during power outage. This feature allows for tiered management of home loads. For example, the main output can be connected to high power, non essential devices such as air conditioners, water heaters, and induction cookers, while the secondary output can be connected to critical devices such as lighting, refrigerators, and routers. This ensures that essential household appliances can operate for longer during power outage.

Recommended dual AC output hybrid inverter

The Xindun HFP-C, HFP-E, and HFP-S hybrid inverter all feature dual AC output. The main and auxiliary AC output can operate independently or simultaneously, providing balanced intelligent power supply to power different devices concurrently. This flexibly meets the needs of users with multiple loads, achieving more flexible and rational power distribution. These three inverters support flexible switching between hybrid, off grid, and on grid modes, as well as battery-free operation mode. Utilizing high frequency pure sine wave output, they enable synergistic and complementary hybrid power from PV, mains, and battery sources, ensuring uninterrupted power supply from all three energy sources.

The HFP-C dual AC output grid inverter features ring shaped LED RGB indicator strip design, a unique RGB light strip, intelligent color indication, and 8 customizable colors.

The HFP-E dual AC output hybrid inverter features detachable display panel design, with the display panel module supporting external split connection. Users can easily remove the inverter's display panel according to their actual application needs and flexibly install it in location that is easy to observe, operate, and monitor.

The above is analysis of the working principle of dual AC output hybrid inverter. For more information on dual AC output hybrid inverter, please feel free to contact Xindun Power.