Product Review · Updated November 2026
EcoFlow DELTA Pro Ultra X Review: 12kWh and 12kW of Whole-Home Backup on Amazon
The EcoFlow DELTA Pro Ultra X is a modular whole-home battery: one inverter with 12,000W of 120/240V output on stackable 6,144Wh LiFePO4 batteries. The Amazon kit includes two batteries for 12,288Wh, takes up to 10,000W of solar and, per EcoFlow, grows to 180kWh. That makes it the closest thing to a Tesla Powerwall 3 you can buy on Amazon. Below: specs, price, runtime math, and how it compares with the original Delta Pro Ultra, the Anker SOLIX E10, the Delta Pro 3 and Powerwall 3.
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By Morgan Chen
Reviewed & approved by Juhi Sahni
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Published: 2026-11-08
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Updated:
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Editorial Standards
DELTA Pro Ultra X kit (1 inverter + 2 batteries)
Capacity
12,288
Watt-hours (LiFePO4)
AC Output
12,000
Watts, 120/240V
Solar Input
10,000
Watts max (2 inputs)
Expands To
180
kWh (EcoFlow figure)
Current price on Amazon: $7,899.00
Rated 91/100 in our scoring. Comparing against Powerwall? Jump to Ultra X vs Powerwall 3.
Delta Pro Ultra X: What You Actually Get
The Ultra X is not a single box. It is an inverter that sits on top of separate battery modules, the same layout as the original DELTA Pro Ultra. EcoFlow launched it in the US on October 13, 2025, alongside its Smart Home Panel 3 (AndroidGuys launch coverage; Homecrux). The Amazon listing is the inverter plus two 6,144Wh batteries and an AC cable, sold by EcoFlow.
- 12,000W continuous at 120/240V from one inverter. EcoFlow says three linked inverters reach 36kW.
- Two batteries are needed for full output. The Solar Lab reports output is capped at 6,000W with only one battery connected, which is why the kit ships with two.
- 10,000W of solar across two high-voltage inputs, listed at 80–500V and 15A each (Homecrux; retailer spec sheets).
- Outlets: 120V 20A outlets, a 120/240V 30A L14-30 twist-lock and a 120/240V 50A outlet, plus a 50A input/output port on the side. There are no USB or DC outputs (The Solar Lab; Homecrux).
- Smart Home Panel 3: EcoFlow pairs the Ultra X with its 200A, 32-circuit panel, which can serve as a main panel or a subpanel (AndroidGuys; Homecrux). It is sold separately.
EcoFlow also publishes a 45kW surge figure, but its materials don’t make clear whether that is one inverter or three linked ones, so we leave surge out. Its published inverter weights don’t agree with each other either, so we leave weight out too. Plan for a multi-piece system that stays where it is installed.
EcoFlow DELTA Pro Ultra X Price: What the Amazon Kit Costs You
The Amazon kit is currently $7,899.00, sold by EcoFlow. That buys the hardware only: one inverter, two 6,144Wh batteries and an AC cable. Budget separately for three things before you compare it with an installed battery:
- A panel connection. Either EcoFlow’s Smart Home Panel 3 or a manual transfer switch, installed by a licensed electrician (see our smart home panel guide and transfer switch guide).
- Permit and labor, which vary by city and by how much of your panel you back up.
- Extra batteries, if 12kWh isn’t enough. Each module adds 6,144Wh; our EcoFlow extra battery guide covers which batteries fit which station.
There is no federal tax credit to subtract in 2026. The Section 25D residential clean energy credit ended for expenditures made after December 31, 2025 (IRS FAQs); details are in our home battery tax credit guide. EcoFlow prices on Amazon move around during the holiday season, and the Black Friday deal tracker shows today’s prices on the models we follow.
Delta Pro Ultra vs Ultra X: What Changed
Both use 6,144Wh battery modules under a separate inverter. The X raises output, solar input and the expansion ceiling, moves to Smart Home Panel 3 and drops the USB ports. Original-DPU figures are from our EcoFlow DELTA Pro Ultra review.
| Spec | DELTA Pro Ultra | DELTA Pro Ultra X |
|---|---|---|
| Continuous output | 7,200W, 120/240V | 12,000W, 120/240V (6,000W with one battery) |
| Battery module | 6,144Wh | 6,144Wh |
| Amazon kit capacity | 6,144Wh (one battery, bundles only) | 12,288Wh (two batteries) |
| Solar input | 5,600W | 10,000W |
| Maximum system | 90kWh | 180kWh (EcoFlow) |
| EcoFlow home panel | Smart Home Panel 2 | Smart Home Panel 3 (200A, 32 circuits) |
| USB / DC outputs | USB-A, USB-C and 12V DC | None |
| Idle draw (The Solar Lab) | About 45W | About 36W |
| Score (our scoring) | 90/100 | 91/100 |
| Amazon price | Check price at Amazon → | $7,899.00 |
Sources: The Solar Lab Ultra X review (one-battery cap, outlets, idle draw, removed USB ports); Homecrux (outlets, no DC output, solar inputs, 180kWh); EcoFlow’s Amazon listing title (12,288Wh, 12,000W, 180kWh); our DELTA Pro Ultra review for the original’s specs.
Which should you get? When we checked on November 8, 2026, the original DELTA Pro Ultra’s Amazon bundle listing showed as unavailable, so on Amazon the choice is mostly made for you. If you find the original elsewhere, The Solar Lab’s view is that “a lot of buyers would be better off with the original version, especially if doing so would save them money.” We agree for homes whose biggest simultaneous load stays under 7.2kW. Pick the X if you need more than 7.2kW at once (two AC condensers, an electric range plus a well pump), have more than 5.6kW of panels, or want Smart Home Panel 3.
Anker SOLIX E10 vs EcoFlow Delta Pro Ultra X
These two are the most direct rivals on Amazon. Both start at about 12kWh, both stack, both give 120/240V, and both need an electrician to connect them to your panel. Specs come from our product database; read the full Anker SOLIX E10 review for the Anker side.
| Spec | EcoFlow DELTA Pro Ultra X kit | Anker SOLIX E10 kit |
|---|---|---|
| Starting capacity | 12,288Wh | 12,000Wh |
| Continuous output | 12,000W | 7,680W (Anker quotes 10kW turbo) |
| Solar input | 10,000W | 9,000W |
| Maximum system | 180kWh (EcoFlow) | 90kWh (Anker) |
| Weight | Not confirmed (sources conflict) | 190.6 lb |
| Score (our scoring) | 91/100 | 92/100 |
| Amazon price | $7,899.00 | $5,999.00 |
The short answer: the Ultra X has more continuous output (12,000W against 7,680W), slightly more solar input and twice the quoted expansion ceiling. In our scoring the E10 kit rates 92/100 and the Ultra X kit 91/100. The E10’s strengths are a weather-rated, stackable enclosure that can live in a garage or a sheltered outdoor spot, and a published weight. Choose the Ultra X if large 240V loads starting together are your worry. Choose the E10 if you want the tidier installed look, and compare the live prices above, because the two kits are close in what they deliver.
EcoFlow Delta Pro Ultra X vs Tesla Powerwall 3
Powerwall 3 is the system most Ultra X shoppers are weighing it against. They are bought in different ways: Powerwall 3 is sold and installed through Tesla and Tesla Certified Installers, not on Amazon, and Tesla quotes each system by address. The Ultra X is a retail purchase that an electrician then connects. Published figures only:
| Spec | Tesla Powerwall 3 (one unit) | DELTA Pro Ultra X (Amazon kit) |
|---|---|---|
| Capacity | 13.5 kWh usable | 12,288Wh rated |
| Continuous output | 11.5 kW | 12,000W, 120/240V |
| Chemistry | LFP | LiFePO4 |
| Solar | Built-in hybrid solar inverter | 10,000W input (EcoFlow figure) |
| Maximum system | Up to four units, 54 kWh | EcoFlow quotes 180kWh |
| Warranty | 10 years, 70% capacity retention | Not confirmed from two sources; check EcoFlow’s terms |
| Where to buy | Tesla and Tesla Certified Installers | Amazon, sold by EcoFlow |
| Price | About $11,500–$16,500 installed, before incentives (EnergySage typical: $13,473) | $7,899.00 (hardware only) |
Powerwall 3 sources: EnergySage Powerwall 3 review (updated May 15, 2026: capacity, output, LFP, built-in hybrid inverter, four units/54 kWh, warranty, $13,473 typical); SolarReviews (capacity, output, LFP, warranty, $15,300–$16,200 installed, sold through Tesla and certified installers); Joule ($11,500–$16,500 installed, May 2026). The two price rows are not like-for-like: the Powerwall figure includes installation, and the Amazon price is hardware only.
How to choose. On paper they are the same class: about 12–13.5 kWh and 11.5–12 kW per system. Get a Powerwall quote if you want one installer to size, permit and install the whole job, with Tesla’s published 10-year warranty. Consider the Ultra X if you want to see the hardware price up front, plan to add a large solar array or many batteries later, or want a system you can take with you if you move. Either way, compare the Ultra X’s Amazon price plus your electrician’s quote against the Powerwall installed quote, not the Amazon price alone. Our Tesla Powerwall 3 price and installed cost guide shows what typically goes into that quote. The full Powerwall-alternatives picture is in our home battery backup guide.
Delta Pro Ultra X vs Delta Pro 3: Do You Need This Much?
Most homes don’t. The Delta Pro 3 is a single wheeled unit with 4,096Wh, 4,000W of 120/240V output and 2,600W of solar, at 113.5 lb. That covers a transfer switch with a fridge, furnace blower, well pump and lights. It rates 95/100 in our scoring, our top-rated home battery, because it delivers most of what a household needs from a smaller, lower-priced kit. The Ultra X earns its place when you need three times the output (12,000W against 4,000W) to run central air, an electric range or several 240V loads together, or when you want to start at 12kWh and keep stacking. The Delta Pro 3’s unit-only Amazon listing showed as unavailable on November 8, 2026; the in-stock option is a bundle with one extra battery (about 8kWh).
Ultra X vs Delta Pro Ultra, SOLIX E10 and Delta Pro 3 at a Glance
Specs come from our product database. Current prices come from Amazon. Scores are from our scoring, built from published specs and prices.
| System | Capacity | Output | Solar In | Expands | Score | Price | Amazon |
|---|---|---|---|---|---|---|---|
| ★ EcoFlow DELTA Pro Ultra X | 12,288 Wh | 12,000W | 10,000W | To 180 kWh (EcoFlow) | 91/100 | $7,899.00 | View → |
| EcoFlow DELTA Pro Ultra | 6,144 Wh | 7,200W | 5,600W | To 90 kWh | 90/100 | Check price at Amazon → | View → |
| Anker SOLIX E10 Prime Off-Grid Kit | 12,000 Wh | 7,680W | 9,000W | To 90 kWh (Anker) | 92/100 | $5,999.00 | View → |
| EcoFlow Delta Pro 3 | 4,096 Wh | 4,000W | 2,600W | To 12 kWh per unit | 95/100 | Check price at Amazon →* | View → |
*Amazon showed the Delta Pro 3 (unit and 8kWh bundle) as currently unavailable when we checked on November 8, 2026, so its cell links to the Amazon listing. The original DELTA Pro Ultra listing had no live price, so its cell links to Amazon instead. Capacity is the Amazon kit as listed: the Ultra X kit has two batteries, the original DPU entry one.
Pros & Cons
Pros
- ✓ 12,000W of 120/240V from one inverter, close to a Powerwall 3’s 11.5kW
- ✓ Starts at 12,288Wh in the Amazon kit; EcoFlow quotes up to 180kWh
- ✓ 10,000W of solar input across two high-voltage inputs
- ✓ 50A 120/240V outlet and L14-30 for transfer switches and RVs
- ✓ Pairs with EcoFlow’s 200A, 32-circuit Smart Home Panel 3
- ✓ About 36W idle draw in The Solar Lab’s run, lower than the original DPU
Cons
- ✗ Full output needs two batteries; 6,000W with one (The Solar Lab)
- ✗ No USB or DC outputs
- ✗ Heavy multi-piece system; EcoFlow’s published weights conflict
- ✗ Panel connection needs an electrician, permit and a panel or transfer switch
- ✗ The Solar Lab reported inconsistent surge handling with a garage compressor
- ✗ No UPS pass-through while charging through the 240V EV-style cable (The Solar Lab)
How Long Will the Delta Pro Ultra X Power a House?
Plan on about 85% of rated capacity reaching your appliances after inverter losses: roughly 10,445Wh for the two-battery kit, and about 20,890Wh with four batteries. Runtime = usable Wh ÷ load. The US average home uses about 899 kWh a month, or roughly 1,230W around the clock (EIA). These are planning estimates, not measurements.
| Typical load | Approx. draw | Kit (2 batteries) | 4 batteries |
|---|---|---|---|
| Fridge + router + LED lights + phones | 300 W | ~35 hours | ~2.9 days |
| Fridge + freezer + furnace blower + lights | 600 W | ~17 hours | ~35 hours |
| Average US home (EIA) | 1,230 W | ~8.5 hours | ~17 hours |
| Central AC running + essentials | 4,000 W | ~2.6 hours | ~5.2 hours |
| Maximum with one battery | 6,000 W | ~1.7 hours | ~3.5 hours |
| Maximum continuous output | 12,000 W | ~52 minutes | ~1.7 hours |
The kit covers an average home for about a third of a day, or essential circuits for more than a day. Surge is the limit to check for compressors: the running load of a central AC is well within 12,000W, but start-up inrush is higher, and The Solar Lab saw shutdowns on a compressor start. Ask your electrician to check the condenser’s locked-rotor amps; a soft starter reduces the inrush. To size your own load, use the solar size calculator.
Charging & Solar Input
| Source | Published figure | Notes |
|---|---|---|
| Solar | 10,000W, two inputs at 80–500V, 15A each | Homecrux and retailer spec sheets (inputs); The Solar Lab (10kW total). EcoFlow says 10kW of solar refills two batteries to 80% in about an hour. |
| AC | Up to 12,000W (The Solar Lab) | The rate depends on the input you use; a standard 120V outlet is far slower. We found no second source for the 12kW figure. |
| Generator | Supported | EcoFlow lists generator pairing; The Solar Lab warns that charging plus load can exceed a small generator’s output unless you lower the charge rate. |
What the solar figure means in practice: panels rarely deliver their full rating, so plan on about 75%. A full 10,000W array is worth roughly 7,500W, or about 1.6 hours of strong sun to refill the 12,288Wh kit. The 80–500V inputs are high-voltage, so this is a roof or ground-mount array wired in long series strings, not a few portable panels. Panel open-circuit voltage rises in cold weather, so have your installer check the string Voc against the 500V limit at your coldest expected temperature.
Installing It: Smart Home Panel 3 or a Transfer Switch
You can run appliances straight from the Ultra X’s outlets, but most buyers want it to back up house circuits. That takes one of two connections, both installed by a licensed electrician:
- EcoFlow Smart Home Panel 3: 200A, 32 circuits, used as a main or subpanel, with circuit-level control in the EcoFlow app. Read our smart home panel guide before you buy one.
- A manual transfer switch or inlet fed from the 50A or L14-30 outlet. Cheaper, but you switch over by hand and back up only the circuits you wire in (how transfer switches work).
Never connect any battery or generator to home wiring without a transfer switch or interlock. Backfeeding the grid can electrocute utility workers and neighbors, as the CPSC warns. The Solar Lab also notes the inverter is strict about load balancing across the two 120V legs, so ask your electrician to balance the circuits you back up.
Who Should Buy the DELTA Pro Ultra X — and Who Shouldn’t
Buy it if you…
- ✓ Want Powerwall-class capacity and output with a visible hardware price
- ✓ Need several 240V loads at once: central air, a well pump, an electric range
- ✓ Have, or plan, a large solar array of up to 10kW
- ✓ Want to start at 12kWh and keep adding batteries
Skip it if you…
- ✗ Only need the fridge, furnace and internet overnight — a Delta Pro 3 does that with a smaller, lower-priced kit
- ✗ Want something you can move around — see our home backup picks for wheeled units
- ✗ Want one installer to handle everything — get a Powerwall quote too
- ✗ Need USB or 12V DC ports on the unit — it has none
Full Specifications (DELTA Pro Ultra X Kit)
| In the box (Amazon kit) | 1 inverter, 2 batteries, AC cable |
| Battery capacity | 12,288 Wh (2 × 6,144Wh, LiFePO4) |
| AC output | 12,000W continuous, 120/240V split-phase; 6,000W with one battery |
| Linked output | Up to 36kW with three inverters (EcoFlow) |
| AC outlets | 120V 20A outlets, 120/240V 30A (L14-30), 120/240V 50A; side 50A input/output port |
| USB / DC | None |
| Solar input | 10,000W, two inputs, 80–500V, 15A each |
| Expandability | 12–180kWh (EcoFlow; one retailer and The Solar Lab list about 184kWh) |
| Home panel | EcoFlow Smart Home Panel 3 (200A, 32 circuits), sold separately |
| Surge | Not listed: EcoFlow’s 45kW figure doesn’t say if it is per inverter |
| Weight | Not listed: published figures conflict |
| Warranty | Not listed: we found it in only one source; check EcoFlow’s current terms |
We list a spec only when at least two independent sources agree. Figures from a single source are labeled with that source. EcoFlow publishes no cycle count we could confirm, and the UPS switchover time it quotes appears in one EcoFlow page only, so both are omitted.
Verdict
The most Powerwall-like system you can buy on Amazon, for homes that really need 12kW.
The DELTA Pro Ultra X kit gives you 12,288Wh, 12,000W of 120/240V output and 10,000W of solar input from one inverter, with room to grow far past any single installed battery. In our scoring it rates 91/100, a score built from published specs and the current Amazon price. It is not the right buy for most homes: if your loads fit in 4,000W, the Delta Pro 3 (95/100) covers it with a smaller kit, and the Anker SOLIX E10 (92/100) is the tidier installed-style alternative. Buy the Ultra X when you need the output, and budget for the electrician.
Sources & Data Verification
We do not physically test units. This review synthesizes manufacturer specs, published third-party reviews and the Amazon listing. Runtime figures are planning estimates. Specs we could not confirm from at least two independent sources are labeled or omitted. Read more on our Editorial Standards page.
- • EcoFlow’s Amazon listing for the DELTA Pro Ultra X kit (title: 12,288Wh, 12,000W, expandable to 180kWh, 1 inverter + 2 batteries)
- • EcoFlow — DELTA Pro Ultra X product page (12–36kW, 12–180kWh, Smart Home Panel 3)
- • The Solar Lab — EcoFlow DELTA Pro Ultra X review (outlets, one-battery cap, idle draw, surge and charging notes)
- • Homecrux — DELTA Pro Ultra X launch report (outlets, no DC output, solar input range, Smart Home Panel 3)
- • AndroidGuys — launch coverage, October 13, 2025 (output, capacity range, solar recharge claim, Smart Home Panel 3)
- • Powerwall 3: EnergySage, SolarReviews and Joule (linked in the Powerwall section above)
- • IRS Section 25D FAQs; EIA residential electricity use; CPSC portable generator safety guide
Frequently Asked Questions
What is the EcoFlow DELTA Pro Ultra X?
It is EcoFlow’s modular whole-home battery system: an inverter with 12,000W of 120/240V output that sits on stackable 6,144Wh LiFePO4 batteries. The Amazon kit includes the inverter and two batteries for 12,288Wh. It takes up to 10,000W of solar input, and EcoFlow quotes expansion to 180kWh. EcoFlow launched it in the US in October 2025 with its Smart Home Panel 3.
How much does the EcoFlow DELTA Pro Ultra X cost?
The live Amazon price for the kit (one inverter, two batteries and an AC cable, sold by EcoFlow) is shown at the top of this page. That is hardware only. Add a licensed electrician, any permit, and either EcoFlow’s Smart Home Panel 3 or a transfer switch to connect it to your home. The federal 25D credit ended for expenditures after December 31, 2025, so there is no federal credit to subtract in 2026.
What is the difference between the Delta Pro Ultra and the Ultra X?
Both use 6,144Wh battery modules under a separate inverter. The Ultra X raises continuous output from 7,200W to 12,000W, solar input from 5,600W to 10,000W, and the quoted maximum from 90kWh to 180kWh. It pairs with Smart Home Panel 3 instead of Smart Home Panel 2 and drops the USB and DC ports. It needs two batteries for full output; with one, The Solar Lab reports a 6,000W cap.
Anker SOLIX E10 vs EcoFlow Delta Pro Ultra X: which is better?
They are close. The Ultra X kit has more continuous output (12,000W against 7,680W), slightly more solar input (10,000W against 9,000W) and a higher quoted expansion ceiling (180kWh against 90kWh). The two score within a few points of each other in our scoring; the Anker SOLIX E10 kit’s strengths are a weather-rated stackable enclosure and a published weight. Pick the Ultra X for large simultaneous 240V loads, the E10 for a tidier installed-style setup.
Is the Delta Pro Ultra X a good alternative to a Tesla Powerwall 3?
It is the closest match sold on Amazon. A Powerwall 3 has 13.5 kWh of usable capacity and 11.5 kW of continuous output, stacks to four units (54 kWh) and is sold and installed through Tesla and Tesla Certified Installers, at about $11,500 to $16,500 per installed unit before incentives. The Ultra X kit has 12,288Wh and 12,000W and is bought on Amazon, with installation extra. Compare its Amazon price plus an electrician’s quote against a Powerwall installed quote.
How long will the Delta Pro Ultra X power a house?
The two-battery kit delivers about 10,445Wh after inverter losses. That is about 8.5 hours at the US average household draw of roughly 1,230W, about 17 hours on a 600W essentials load, and about 35 hours on 300W for a fridge, router and lights. Four batteries roughly double those figures. Solar or generator charging extends them.