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Growatt 11.4K Split Phase Transformer — 240/208V with Built-In Transformer

Reliable Split Phase Power for Your Off-Grid System

Unlock the full potential of your off-grid or backup power system with the Growatt 11.4K Split Phase Transformer, engineered to deliver stable, high-efficiency power for demanding residential and small commercial applications. This premium component ensures seamless, reliable performance when paired with compatible Growatt inverters, providing the robust split-phase output you need for heavy-duty loads and absolute peace of mind.

240/208V split phase output — Delivers stable dual-voltage for residential loads
11,400VA maximum combined output — L1-N and L2-N run simultaneously at full capacity
Built-in transformer integration — No external transformer needed for split phase conversion
5kW continuous power rating — Sustains energy storage systems under steady load
  • FREE System Design Consultation -- Our engineers verify your inverter-to-transformer pairing before you buy
  • FREE Shipping -- LTL freight included on all orders, no surprise charges
  • Compatibility Guarantee -- Pre-vetted to work with your Growatt inverter setup

$482.95

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Growatt-11.4K-Split-Phase-Transformer-2
Growatt 11.4K Split Phase Transformer
$482.95

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In the box

  • Growatt ATS 11400T-US Split Phase Transformer
Growatt-11.4K-Split-Phase-Transformer-2
Growatt 11.4K Split Phase Transformer — 240/208V with Built-In Transformer
$482.95

Reliable Split Phase Power for Your Off-Grid System

The Growatt 11.4K Split Phase Transformer (ATS 11400T-US) delivers stable 240/208V split phase output for your grid-independent power system. With a built-in transformer and 11,400VA maximum output capacity, it handles the demands of larger residential and small commercial off-grid setups. This field-tested unit pairs with compatible Growatt inverters to keep your homestead or backup system running smoothly when the grid goes down. Ships free.

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11,400VA Max Output
Built-In Transformer
240/208V Split Phase
Pairs with Growatt Inverters
11,400VA
Maximum Output
240/208V
Voltage
5kW
Max Continuous Power
Growatt-11.4K-Split-Phase-Transformer-2

Split Phase Power Without the Compatibility Guesswork

One of the most common failures in off-grid builds is mismatched voltage between the inverter output and the home's electrical panel. A grid-tied installer sells you a system that goes dark the moment the utility fails, and a marketplace purchase leaves you guessing whether your inverter actually supports 240V split phase. The Growatt ATS 11400T-US eliminates that risk with a built-in transformer purpose-built for compatible Growatt inverters. At Off Grid Vault, every component we carry is pre-vetted to work together — because we spec systems we would install on our own cabins. This transformer delivers stable 240/208V split phase output at 11,400VA maximum, so your 120V and 240V loads run correctly without external workarounds.

Growatt-11.4K-Split-Phase-Transformer-1

11,400VA Output Covers Your Real Residential Loads

Your well pump, dryer, and air compressor all need 240V. Your lights, outlets, and electronics run on 120V. The ATS 11400T-US handles both simultaneously with a maximum combined L1-N and L2-N output of 11,400VA. That means you are not choosing between running the well pump or keeping the lights on — both legs carry their rated load at the same time. For energy storage applications, the transformer sustains up to 5kW of continuous power, which covers the baseline draw of a typical off-grid home without clipping or voltage sag under load.

Growatt-11.4K-Split-Phase-Transformer-2

Built-In Transformer Keeps Your Install Clean

External transformers add wiring complexity, extra enclosure costs, and another potential failure point in your system. The ATS 11400T-US integrates the transformer directly into the unit, so your split phase conversion happens inside one enclosure. That means fewer connection points, a cleaner panel layout, and less time spent troubleshooting voltage issues during commissioning. Pair it with a compatible Growatt inverter, and your 240/208V output is ready to feed your main panel. Off Grid Vault includes a free system design consultation with every purchase — our engineers verify your inverter-to-transformer pairing before you buy.

Compatibility Check

Confirm this transformer matches your system before ordering.

  • System requires 240/208V split phase output
  • Paired with a compatible Growatt inverter
  • Continuous power demand does not exceed 5kW

Where This Transformer Fits

Built for serious off-grid and backup power scenarios.

Residential Off-Grid Homes
Small Commercial Backup
Homestead Power Systems

Full specifications

At a glance

Dimensions
See product page
Power
240/208V
Surface
See product page
Warranty
See product page
Full specifications7 data points across 4 categories

Dimensions

DimensionsSee product page

Power & Performance

Voltage240/208V
Max Power11400VA
Max Continuous Power (Energy Storage)5kW
Max L1-N + L2-N Simultaneous Output11400VA

Materials

MaterialsSee product page

Compliance & Warranty

WarrantySee product page

The Off Grid Vault Promise

Every product we carry is vetted for real-world performance. This transformer is no exception.

30-Day Performance GuaranteeIf it doesn't perform as specified, we make it right — uninstalled returns accepted in original packaging.
Free ShippingShips free to your door — no minimums, no thresholds, no surprise freight charges.
Free System Design ConsultationOur engineers size your system for your actual consumption — no guesswork, no incompatible components.
★★★★★
“I bought this transformer to pair with my Growatt inverter for my cabin build. Before finding Off Grid Vault, I was going to piece together components from three different vendors and hope the voltage worked out. Their team confirmed my inverter compatibility before I ordered. Installed it last month — 240V to my well pump and 120V to everything else, no issues. Exactly what I needed.”
F
First L.Prescott, AZ

Growatt 11.4K Split Phase Transformer | ATS 11400T-US

Elevate your off-grid or backup power system with the Growatt 11.4kW Split Phase Transformer (ATS 11400T-US), a premium solution engineered for seamless energy management in larger residential and small commercial applications. Priced at $482.95, this robust transformer delivers stable, efficient split-phase power when paired with compatible Growatt inverters, ensuring reliable performance and smooth operation for your critical loads. Whether you’re building a resilient off-grid homestead or fortifying your business against outages, this transformer provides the dependable backbone your system needs.

Key Features

  • High Power Capacity: Supports up to 11400VA of total power, with a maximum sum of L1-N and L2-N simultaneous output of 11400VA, ideal for demanding residential and light commercial setups.
  • Built-In Transformer: The ATS 11400T-US includes an integrated split-phase transformer, simplifying installation and ensuring consistent voltage conversion for sensitive electronics.
  • Energy Storage Ready: Delivers maximum continuous power of 5kW for energy storage systems, optimizing battery performance and extending runtime during outages.
  • Voltage Versatility: Operates at 240/208V, providing flexible compatibility with standard North American split-phase electrical panels and appliances.
  • Premium Build Quality: Engineered by Growatt, a trusted leader in renewable energy, for long-term reliability in off-grid and backup power environments.

Specifications

  • Model: ATS 11400T-US
  • Product Type: Split Phase Transformer
  • Voltage: 240/208V
  • Max Power Rating: 11400VA
  • Maximum Continuous Power (Energy Storage): 5kW
  • Transformer: Built-in
  • L1-N + L2-N Simultaneous Output: Up to 11400VA
  • Price: $482.95

Why Choose Growatt 11.4K Split Phase Transformer

The Growatt 11.4K Split Phase Transformer stands as a cornerstone for any serious off-grid or backup power system. Its high 11400VA capacity and integrated transformer design eliminate the need for external components, streamlining setup while maximizing efficiency. With a dedicated 5kW continuous output for energy storage, this unit ensures your battery system performs at its peak, delivering reliable power when you need it most. Backed by Growatt’s reputation for innovation and durability, and supported by our Lowest Price Guarantee, this transformer offers unmatched value for homeowners and businesses seeking energy independence. Trust in a solution that combines precision engineering with real-world performance—choose the Growatt ATS 11400T-US for your next power project.

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Frequently Asked Questions

This transformer ships as a single unit. Assembly is minimal; it is designed for straightforward installation by a qualified electrician. Ensure the unit is securely mounted and all electrical connections comply with local codes. Professional installation is recommended for safety and optimal performance.
The Growatt 11.4K Split Phase Transformer (ATS 11400T-US) is specifically designed to pair with compatible Growatt inverters to deliver stable split phase power. It supports 240/208V systems for both off-grid and backup power applications. Verify compatibility with your specific inverter model before purchase.
This transformer has a maximum power rating of 11400VA, with a maximum continuous power of 5kW for energy storage. The maximum simultaneous output on L1-N and L2-N combined is 11400VA. Ensure your system load does not exceed these limits for reliable operation.
The Growatt ATS 11400T-US includes a built-in transformer, designed for durable and efficient power conversion. Specific material details are not provided in the product data, but it is built to residential and small commercial standards for reliability and longevity.
Routine maintenance includes periodic inspection of connections and ensuring the unit is kept clean and free of dust. Check for any signs of wear or damage. Refer to the manufacturer's guidelines for detailed maintenance schedules. Professional servicing is recommended for any issues.
Your satisfaction is guaranteed with a Lowest Price Guarantee. For specific return policies, warranty terms, and technical support, please contact our customer service team directly. We are here to assist with any questions about installation or operation.
This transformer is designed for larger residential and small commercial applications requiring stable split phase power. It is ideal for off-grid solar systems and backup power setups where a compatible Growatt inverter is used. It is not intended for basic portable power needs.
SKU: 1519095-AR Categories: , Brand:

The Off Grid Vault Promise

Every product we carry is vetted for real-world performance. This transformer is no exception.

30-Day Performance Guarantee If it doesn't perform as specified, we make it right — uninstalled returns accepted in original packaging.
Free Shipping Ships free to your door — no minimums, no thresholds, no surprise freight charges.
Free System Design Consultation Our engineers size your system for your actual consumption — no guesswork, no incompatible components.

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