EcoFlow DELTA Pro Ultra X Portable Backup Solar Kit | 12kW 120/240V | 4kW Solar | 12.29kWh Battery

EcoFlow DELTA Pro Ultra X Portable Backup Solar Kit | 12kW 120/240V | 4kW Solar | 12.29kWh Battery

$10,252.00

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A solar kit built around the EcoFlow DELTA Pro Ultra X.

  • 12 kW continuous 120/240V split-phase output
  • Solar: 10 × 400W panels (4 kW DC)
  • Storage: 12.29 kWh (2 × 6.144 kWh Wall/Floor-Mount) EcoFlow DELTA Pro Ultra X batteries
  • Home connection: None (Unit Only)
  • Grid-connected backup, no export

Racking sold separately.

SKU: WEB-EFDELTAPROUX-US-10P-12.29KWH Categories: , , Brand:

Portable Power · Home Backup

EcoFlow DELTA Pro Ultra X Portable Backup Solar Kit | 12kW 120/240V | 4kW Solar | 12.29kWh Battery

This kit is built around the EcoFlow DELTA Pro Ultra X, delivering 12 kW of continuous 120/240V split-phase output, paired with 10 × 400W panels (4 kW DC) and 12.29 kWh (2 × 6.144 kWh Wall/Floor-Mount) of storage.

At a Glance
  • 12 kW continuous AC output, 120/240V split-phase
  • Surge capacity up to 45 kW for motor starting
  • Solar array: 10 × 400W panels (4 kW DC)
  • Battery options: 12.29 kWh (2 × 6.144 kWh Wall/Floor-Mount) (EcoFlow DELTA Pro Ultra X batteries)
  • Home connection: None (Unit Only)
  • Grid-connected backup, no export

Choose Your Configuration

Battery Storage 12.29 kWh (2 × 6.144 kWh Wall/Floor-Mount)
Rack-Mount batteries install in a battery rack or cabinet; Wall/Floor-Mount batteries mount on a wall or stand on the floor.

Options are offered in specific combinations; available combinations are shown in the selector above.

Estimated Annual Solar Production

Phoenix, Arizona ~6,800 (10P) kWh/year
Chicago, Illinois ~5,000 (10P) kWh/year

Planning estimates for an unshaded, south-facing array at about 30° tilt with typical losses. Actual production varies with location, orientation, tilt, shading, weather and equipment. Use a site-specific model before purchase.

System Overview

The kit pairs the inverter with an array sized to refill the battery on an average day (3.5 peak sun hours) and a battery bank that can deliver the inverter’s full output. It connects to the grid for charging and backup but does not export power.

Ideal Applications

  • Outage backup for the essentials: refrigerator, lights, internet and outlets
  • Extended-stay off-grid cabins

What’s Included

  • One EcoFlow DELTA Pro Ultra X
  • ALEX-400 400W solar panels (count per configuration)
  • EcoFlow DELTA Pro Ultra X batteries (battery configurations), with mounting and battery cabling
  • None (Unit Only) (per configuration)
  • MC4 connector pairs and 10 AWG PV wire (black and red)
  • PV disconnects (one per two strings) on configurations without rapid shutdown
Installation note: Racking is sold separately. Site-specific wire and conduit, breakers, service and interconnection equipment, and permitting materials may be required. Utility and AHJ requirements vary; final design must follow manufacturer instructions and applicable code.
Weight 658.5 lbs
Dimensions 72 × 48 × 54 in
Brand

Inverter Platform

EcoFlow DELTA Pro Ultra X
Inverter Quantity

Single
Continuous Output

12 kW
Inverter Size (KW)

10KW-15KW
Output (V)

120V/240V
Grid Connection

Grid-Connected Backup (No Export)
Generator Compatible

Yes
Inverter Type

Portable Power Station
Solar Capacity (DC)

0KW-5KW
Battery Capacity (KWH)

10KWH-20KWH
Solar Array

10 Panels (4 kW)
Battery Storage

12.29 kWh
Backup Interface

None (Unit Only)
Rapid Shutdown

None

What Can It Power?

Built around the EcoFlow DELTA Pro Ultra X, a high-output portable power system that can back up home circuits, this kit delivers 12 kW of continuous 120/240V split-phase output.

12 kW
Continuous output, 120/240V split-phase
45 kW
Surge for motor starting
12.29 kWh
Battery storage options
4 kW
Solar array (400W panels)
What you can run
Everyday essentials

0.5–1.5 kW

Refrigerator and freezer, LED lights, ceiling fans, phone and laptop charging, modem, router and TV. These small and cycling loads are the starting point for long outage coverage.

Kitchen, laundry & larger loads

1.5–5 kW each

Microwave, coffee maker, washer or dishwasher as needed. An electric water heater, dryer, oven or range can use a large share of the output, so stagger them instead of running them together.

Cooling, pumps & shop tools

Check starting current

A compatible mini-split, central HVAC, well pump or shop tool may run when its running demand and starting current fit within 12 kW continuous and 45 kW surge. Check the actual equipment; tonnage or horsepower alone doesn’t confirm it. A soft starter can help some compressors.

Illustrative operating mixes
Refrigerator/freezer, LED lights, internet, TV and fans0.5–1.5 kW
Essentials + microwave or coffee maker2–3.5 kW while it runs
Essentials + a smaller inverter mini-split1.5–3 kW
Essentials + a 4.5 kW electric water heater5–6 kW while heating
Essentials + 3-ton central A/C running4–6 kW plus a large starting surge
Plan around the limits
Add up the loads that run at the same time and allow for motor starts. For a 12 kW split-phase system, keep loads balanced across the two 120V legs: a heavily loaded leg can reach its limit before the total does. A larger battery adds runtime but doesn’t raise the inverter’s output. Examples are planning illustrations, not guaranteed appliance packages.

How Long Will It Run?

Battery size sets how much energy you have. These battery-only estimates use 80% of nominal storage delivered to loads (9.83 kWh from 12.29 kWh).

0.5 kW · Lean essentials / light overnight use

12.29 kWh

19.7 hrs

1 kW · Essentials with more appliance use

12.29 kWh

9.8 hrs

2 kW · Moderate household use

12.29 kWh

4.9 hrs

4 kW · Higher sustained use

12.29 kWh

2.5 hrs

6 kW · Heavy sustained use

12.29 kWh

1.6 hrs

12 kW · Full rated output

12.29 kWh

0.8 hrs

Runtime = usable battery energy ÷ average load, starting full, with no solar, grid or generator. Average load includes cycling: a 1 kW appliance running half the time averages about 0.5 kW. Actual results depend on settings, battery condition, temperature and system consumption.

At 12 kWh per day
0.8 days on 12.29 kWh
At 24 kWh per day
0.4 days on 12.29 kWh

Cooling, heating and electric water heating can change daily totals substantially.

What Does Solar Add?

Solar powers daytime loads and recharges the battery with what’s left.

10 panels · 4 kW DC
≈ 11 kWh / day
≈ 4,100 kWh / year

Illustration: 3.5 peak sun hours × array rating × 80% system yield, rounded. Not a location-specific forecast. Household use draws from this energy too, so not all of it refills the battery. Shading, winter and cloudy days can sharply reduce production.

When Solar Isn’t Enough

Utility available
Charges from the grid and solar; with the Smart Home Panel option, selected home circuits run from the grid normally and switch to battery in an outage. No export.
Grid outage: solar + battery
The system supplies only the circuits connected to its backup output, from solar and stored energy. Plan for the 12 kW output limit, battery discharge limits and motor starts, and shed large loads to extend runtime.

Why This System?

The EcoFlow DELTA Pro Ultra X Portable Backup Solar Kit is built around the EcoFlow DELTA Pro Ultra X, a high-output portable power system that can back up home circuits. Match the configuration to your daily energy use, the loads that run together and your installation.

12 kW for a useful mix of loads

120/240V split-phase output runs common household circuits and compatible 240V equipment. Manage what runs together and check motor starts for HVAC, pumps or shop tools.

12 kW output with high surge

Starts demanding motor loads.

Three solar inputs

Two high-voltage and one low-voltage input.

Smart Home Panel 3 option

Connect to home circuits for automatic backup.

Matched as a system

The battery bank can deliver the inverter’s full output, the array is sized to recharge the battery, and strings are laid out within the inverter’s limits.

Choose Your Size

10 panels · 4 kW DC solar · 9.83 kWh usable · None (Unit Only)
12.29 kWh

A balanced step up in solar and runtime.

Only the combinations shown in the product selector are offered. Every option uses the same EcoFlow DELTA Pro Ultra X configuration.

Plan the system around your site
This platform doesn’t sell excess power back to the utility. Racking, site-specific electrical materials and installation are additional.

Other Sizes on This Platform

EcoFlow DELTA Pro Ultra X Portable Backup Solar Kit | 12kW 120/240V | 9.6kW Solar | 30.72kWh Battery

Reference: EcoFlow DELTA Pro Ultra X manufacturer information.

Frequently Asked Questions

Does this kit include batteries?
Yes: 12.29 kWh (2 × 6.144 kWh Wall/Floor-Mount) of EcoFlow DELTA Pro Ultra X batteries, per the option you choose.
Will it power my home during an outage?
Yes, for the circuits connected to its backup output (or the whole home with a whole-home interface).
What is the solar array size?
10 × 400W panels (4 kW DC).
What output does it provide?
12 kW continuous at 120/240V split-phase.
Can I sell excess solar to the utility?
No. This system does not export power to the grid.
Can I connect a generator?
Yes. Use an inverter-style generator (3–5% THD) with 2-wire auto-start for automatic control. Generator not included.
Is racking included?
No. Roof or ground-mount racking is site-specific and sold separately.
Are all breakers, wire and conduit included?
Not necessarily. Site-specific wire, conduit, breakers, service upgrades and interconnection hardware may be required.
How much does weather matter?
Solar production drops in cloudy or winter weather; plan on a generator or grid charging for long low-sun periods.
Do I need permits or utility approval?
Most installations need permits and inspections, and grid-connected systems need utility interconnection approval. Requirements vary by location.
Can this be installed DIY?
That depends on your jurisdiction and utility. Electrical work must follow manufacturer instructions, adopted code and any licensing requirements.
How do I know which configuration is right for me?
Use our kit selector, or contact SanTan Solar to match the system to your loads, usage and runtime needs.
Still have questions?

Contact SanTan Solar for help matching the system to your project.

AC Generator Charging Adapter Quick Start Guide V1.0Download
DELTA Pro Ultra Quick Start Guide V1.0Download
DELTA Pro Ultra Safety InstructionDownload
Trolley Quick Start Guide V1.0Download
Inverter – cSGSus UL 1012 & UL 1778 & CSA 107.3 CertificateDownload
Inverter – cSGSus UL 1741 & CSA 107.1 & UL 1699B CertificateDownload
UL 9540 CertificateDownload

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