Split-phase inverter chargers are versatile devices that are revolutionizing the way we harness and manage power in our homes and off-grid setups. In this blog, we'll unravel the mysteries behind split-phase inverter chargers and explore why they're becoming a crucial component of modern energy systems.

What Is Inverter Charger?

An inverter charger is a power device that combines the functionalities of an inverter, a battery charger, and a transfer switch into a single, integrated unit. It converts DC (Direct Current) power from batteries into AC (Alternating Current) power for household use while also enabling the charging of the batteries using AC power from an external source.

Split-Phase Inverter Charger vs. Single-Phase Inverter Charger

The single-phase and split-phase terms are defined by the number of live wires in a circuit. A single-phase circuit has one live wire while a split-phase system has two live wires.

In the United States, a 120V/240V split-phase system is a prevalent single-phase three-wire power distribution setup. It typically provides a standard voltage of 120V between one phase and neutral for residential and light commercial use. For more power-hungry industrial equipment like compressors, refrigerators, and pumps, the voltage between phases (Live to Live) is 240V.

Accordingly, a single-phase inverter charger differs from a split-phase one in their output capabilities.

• A single-phase inverter charger generates a single AC waveform, suitable for basic household applications.
• A split-phase inverter charger splits the power into two distinct AC outputs, enabling a split-phase configuration suitable for powering larger appliances and systems found in typical homes.

How 120V/240V Split-Phase Inverter Charger Works?

A 120V/240V split-phase inverter charger converts DC power produced by solar panels into AC power at either 120V or 240V to supply appliances while charging the connected battery using either/both the solar panels or/and the connected grid, adapting to the diverse requirements of different appliances and systems.

In general words, a 120V/240V split-phase inverter charger combines an inverter, a battery charger, with a transfer switch.

Inverter Function

Many appliances work only with AC voltage while the solar battery provides DC voltage. That's why we need inverters. The major role of a 120V/240V split-phase inverter charger is to convert direct current to alternating current for home and commercial application. The direct power can come from solar panels, batteries, and DC generators.

In North America, split-phase power systems are common for residential and light commercial use. These systems enable the utilization of both 120V and 240V power, catering to a wide range of electrical needs. This configuration is characterized by two 120V live wires that are 180 degrees out of phase with each other. This phase difference enables the generation of a 240V voltage between the two live wires.

• 120V Power System for Normal Appliances

In a 120V power system, a single live wire and one neutral wire are utilized. This setup accommodates standard household appliances such as televisions, computers, and lighting fixtures, ensuring that everyday needs are met efficiently.

• 240V Power System for Power-Hungry Appliances

For power-hungry appliances like microwaves, water heaters, and dryers, a 240V power system comes into play. This system involves two live wires and one neutral wire, with a 240V potential between the live wires.

Battery Charger Function

A 120V/240V split-phase inverter charger also serves as a battery charger to charge the connected batteries using the grid or generator when the charging source is available.

Transfer Switch

Generally, a 120V/240V split-phase inverter charger boasts a built-in transfer switch that switches between different power sources: grid power, battery, and generator.

Why Do We Need Split-Phase Inverter Charger?

Split-phase inverter chargers bridge the gap between renewable energy sources, batteries, and household power needs. They provide a versatile and efficient means of utilizing stored energy from batteries, ensuring a continuous power supply even during grid failures.

• Enhanced Efficiency: With the capability to output either 120V or 240V, split-phase inverter chargers offer a versatile solution adaptable to a range of scenarios, from backup power to home appliances.
• Decreased Electricity Expenses: Leveraging solar energy can lead to significant reductions in electricity costs, and certain inverters even allow for feeding excess power back into the grid.
• Expanded Compatibility: Split-phase inverter chargers boast compatibility with various battery types, ensuring they harmonize effectively with a diverse array of energy storage solutions.
• Uninterrupted Power Supply: Thanks to seamless integration into the grid, split-phase inverter chargers ensure an uninterrupted power source.

REGO HF 12V 3000kW Split-Phase Inverter Charger

REGO HF 12V 3000kW Inverter Charger is Renogy's first split-phase inverter charger. As a pioneer split-phase inverter charger specially designed for RVs, it integrates an inverter, a charger, and a transfer switch in a compact box.

REGO 12V 3000W HF Inverter Charger is your off-grid smart living center that revolutionizes comfort when you live in your off-grid home or RV. The inverter charger can invert DC to AC and directly supply power to the load, and charge the battery when it is connected to the utility power.

In addition, it supports different types of batteries such as lithium, GEL, flooded, SLD, and AGM batteries. The inverter charger can switch power supply from the grid power to batteries within 10 milliseconds, ensuring a smooth mode switch without powering off the load. The lever style connectors make AC IN/OUT connections simple and easy. They simplify installation and shorten the installation time.

A typical setup for REGO HF inverter charger is as follows:

 

The high-frequency inverter charger features:

• All-in-one solution combining inverter with battery charger: It converts DC power to AC power and charges the battery via the grid or generator. This results in easier system installation, a reduced footprint, and lighter weight.
• Dual voltage support and high-current output: Supporting both single-phase 120V and split-phase 120V/240V, the inverter accommodates home and RV campsite charge stations across North America. It integrates a 50A AC Transfer Relay for continuous 50A current to AC output when connected to both the grid and battery.
• Enhanced security: The inverter charger provides a neutral-grounding relay that ensures that either the neutral in or out contact of the RV is always grounded. This helps prevent electrical shock caused by contact between the neutral contacts of the RV and external AC power sources.
• Outstanding output performance: The surge power reaches 9000VA at 100ms and provides a peak conversion efficiency of over 90% thanks to quality pure sine wave , reducing energy loss thanks to the smooth AC power with minimal harmonic distortion, equivalent to grid power quality.
• Built-in Bluetooth : The built-in Bluetooth module enables the inverter charger to connect seamlessly to the DC Home app and Renogy ONE for energy data monitoring, control, and configuration with OTA firmware upgrades supported.
• Reduced electromagnetic interference: Operating at higher frequencies compared to traditional inverter chargers, it minimizes disruption to electrical and wireless communication.

Discover a product review from Jason Kreiling, a dedicated Renogy enthusiast. We're honored to have had him test the REGO 12V 3000W HF Inverter Charger ahead of its official release.

Buyer Guide: Renogy 12V 3000W Inverter/Charger

Renogy 3000W inverters and inverter chargers come in different sizes and specifications. Take a glimpse of the key factors to consider when you buy an inverter.

The HF model outperforms others in:

• Lighter weight
• Single-phase 120V and 120V/240 split-phase
• High frequency
• Higher conversion efficiency
• Wider charging current range

The details are listed below:

• Basic Comparison

*The split-phase 240VAC output is only available when the inverter charger is supplied by a split phase 120/240VAC source.

• Input/Output Parameters

*The split-phase 240VAC output is only available when the inverter charger is supplied by a split phase 120/240VAC source.

FAQ

Q1: Can I use a split-phase inverter charger for residential purposes?

Absolutely! Split-phase inverter chargers are designed for residential applications, ensuring reliable power supply and seamless transition between different power sources.

Q2: How does a split-phase inverter charger handle grid failures?

During power outages, the inverter charger's transfer switch shifts to battery power, providing instant backup energy to critical appliances and systems.

Q3: Can I expand my system to include more batteries?

Yes, many split-phase inverter chargers allow for the expansion of your battery bank, accommodating your growing energy storage needs.