Growatt 11.4kW Whole Home Backup Power System
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Growatt 11.4kW Whole Home Backup Power System
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What it is, and what it is for
Growatt Whole Home Backup Power System
A hybrid inverter, a high-voltage battery and an automatic transfer switch, supplied as one matched system for a house with heavy loads. It stores solar or off-peak grid energy, carries the house through an outage, and returns to normal automatically. The kit is built around the Growatt MIN 11400TL-XH-US 11.4kW hybrid inverter and the ATS-XH-US transfer switch; choose 10kWh or 20kWh of battery.
What's included:
- Growatt MIN 11400TL-XH-US 11.4kW hybrid inverter
- APX high-voltage LFP battery — 10kWh or 20kWh, depending on the option you choose
- Growatt ATS-XH-US 11.4kW backup box, with a built-in split-phase transformer for 120V / 240V output
- Growatt smart meter
Solar panels are not included. This is a storage and backup system, not a solar kit. It works with an array you already have, or panels can be bought separately and sized to the inverter — ask us and we will work out how many you need.
Suited to households with high daily consumption, and to homes with heavy loads such as electric vehicles and swimming pools. It maximises self-consumption of solar energy, reduces electricity bills, and keeps the house running through an outage.
System key features:
- Energy independence: generate and store your own energy to reduce reliance on the grid.
- Self-consumption optimisation: store energy when it is cheap or plentiful and use it at peak.
- Outage cover: switches to off-grid mode automatically when the grid fails.
- Flexible energy management: self-consumption, zero export, time-of-use and off-grid modes.
- High efficiency: up to 98.5% with 4 MPP trackers.
- Monitoring: built-in 4G/WiFi, with real-time data through the app or web portal.
Growatt MIN 11400TL-XH-US 11.4kW Hybrid Inverter:
- Battery ready for DC and AC coupled systems
- Supports backup power and dark start operations
- Rapid shutdown solution and AFCI integrated
- Compliant with UL1741SA, CA Rule 21 and HECO standards
- 10-year warranty
APX High Voltage Battery:
- Pre-assembled, modular design — add capacity later
- 10kWh or 20kWh, depending on the option chosen
- Safe LiFePO4 chemistry with over 6,000 cycles
- Wide temperature tolerance, -10°C to +45°C
- 10-year warranty
Growatt ATS-XH-US 11.4kW Backup Box:
- Whole home load backup up to 11.4kW
- Built-in split-phase transformer for 120V / 240V output
- Automatic changeover during power outages
- 10-year warranty
Warranty: 10 years on the inverter, the battery and the backup box.
1 component, and one thing that isn't here
Each one is a product we sell on its own, so you can read its full listing, and replace or add to it later.
Rails, roof hooks, ground-mount posts and clamps depend on the roof or ground they go on, so no system ships with them. They are sold separately, and the finder adds the right pack for your surface when it sizes a system.
Published before you buy. No email required.
Every number, by component.
The figures the manufacturer publishes. The datasheet above is the reference if the two ever differ.
| Growatt MIN 11400TL-XH-US 11.4kW Hybrid Inverter | Details |
|---|---|
| Max. PV Input Power | 22.8kW |
| Max. Input Voltage | 600V |
| Nominal Voltage | 400V |
| Max. Output Power | 11.4kW |
| Max Efficiency | 98.5% |
| Max. Output Current | 48A |
| Dimensions (W/H/D) | 15.8 x 25.2 x 7.4 inches (400 x 638 x 187 mm) |
| Weight | 45.2 lbs (20.5 kg) |
| Warranty | 10 Years |
| Safety | UL1741, UL1741SA, UL1998, UL1699B, CSA C22.2 |
| EMC | FCC Part 15 Class B |
| Grid Regulation | IEEE1547, Rule 21 (HECO Compliant) |
| Growatt APX High-Voltage LFP Battery (10kWh or 20kWh) | Details |
|---|---|
| Battery system | Growatt APX high-voltage LFP, modular |
| Options on this listing | 10kWh (2 × APX 5.0P-B1 modules) or 20kWh (4 × APX 5.0P-B1 modules) |
| Power Module | APX 98020-P1, one per stack |
| Battery Module | APX 5.0P-B1 |
| Battery Module Capacity | 5kWh |
| Max. Output Power/Module | 5kW |
| Peak Output Power/Module | 8kW for 60s |
| Battery Type | Cobalt Free Lithium Iron Phosphate (LFP) |
| Protection Class | IP66 |
| Installation | Wall-mounting or Floor Installation |
| Operating Temperature | -10°C~50°C |
| Allowed Humidity | 5%~95% |
| Cooling | Natural Convection |
| Altitude | <4000m |
| Warranty | 10 Years |
| Communication | CAN/RS485 |
| Certification & Licensing | IEC62040, IEC62619, IEC62477, CE, UKCA, UN38.3 |
| Environment Requirements | RoHS Compliant |
| Growatt ATS-XH-US 11.4kW Backup Box | Details |
|---|---|
| Backup Capability | Partial home load backup |
| Output | 120V/240V |
| Max Output Power | 11.4kW |
| Dimensions | 15.75 x 22.41 x 6.98 inches (400 x 569 x 170.5 mm) |
| Weight | 32.3 lbs (14.65 kg) |
| Warranty | 10 Years |
| Growatt Smart Meter | Details |
|---|---|
| Model | Smart Meter |
| Communication | RS485 |
| Voltage Range | 100V-240V |
| Current Range | 5A |
| Dimensions | 120 x 65 x 45 mm |
| Weight | 0.5 kg |
| Warranty | 10 Years |
Before you order.
If yours isn't here, ask an engineer. It costs nothing and it's the step most people skip.
Is the racking or mounting hardware included?
No. Rails, roof hooks, ground-mount posts and clamps depend on the roof or ground they go on, so no system ships with them. They are sold separately. The finder adds the right pack for your surface when it sizes a system, or ask us and we will match one to your roof.
Can I install it myself?
The equipment ships ready to connect, but the AC side, the grounding and any connection to the grid must be done by a licensed electrician. A grid-tied or hybrid system also needs a permit and your utility's interconnection approval before it is switched on. The wiring diagram and commissioning record we publish are for reference; they are not a stamped design, and a professional engineer's review is required where your jurisdiction calls for one.
Are the solar panels included?
Where the title names an array — “7.04 kW panels”, say — the panels are in the box and appear under What ships. A backup system whose title names no array, such as the Growatt whole-home and partial-home backup systems, is the inverter and battery only, and its listing says so. Panels for those are sold separately.
What is the difference between off-grid, grid-tie and hybrid?
An off-grid system has no utility connection: the battery carries the night and the generator input carries the dark days. A grid-tie system has no battery: it feeds your panel and the grid by day and goes dark in an outage. A hybrid system does both — it works with the grid and keeps a battery, and with its transfer switch it carries your essential circuits through an outage.
Which tax credits and incentives apply?
The 30% federal residential credit ended on 31 December 2025, and nothing on this page assumes it. Some states still run their own credits, sales-tax exemptions or generation payments; the savings estimate above lists the ones we know of for your state, and our tax credit guide explains what applies in 2026.
Can I charge from a generator?
Most off-grid inverters in the range have a generator input for charging on dark days; the specification table says whether this one does and at what current. A grid-tie inverter has no generator input. A hybrid system takes a generator through its transfer switch, if your electrician wires one in.
What if I'm not sure this is the right product?
Ask before you order. Send us what you need to run, or your pool or well figures, and an engineer will confirm the choice — it costs nothing. Or use the finder below, which sizes from what you actually run and shows its reasoning.
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Same price and options as at the top of the page. Shipping is worked out at checkout from your address.
