Product Review · Updated October 2026
EcoFlow DELTA Pro Ultra Review: Whole-Home Backup Power, and the Alternatives You Can Buy Today
Verdict
The EcoFlow DELTA Pro Ultra is a modular whole-home battery: a 6,144Wh LiFePO4 pack and a 7,200W 120/240V inverter that scales to 90kWh. It is one of the few consumer systems that can start central air and a well pump. It suits homeowners planning an electrician-installed Smart Home Panel 2 setup. It is heavy, at about 182 lb across two pieces. Amazon sells it only in bundles, and none had a live price when we checked, so most shoppers should also compare the in-stock alternatives below.
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By Morgan Chen
Reviewed & approved by Juhi Sahni
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Published: October 31, 2026
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Updated:
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How we score
EcoFlow DELTA Pro Ultra at a Glance
Capacity
6,144
Wh per battery (to 90kWh)
AC Output
7,200
Watts, 120/240V
Solar Input
5,600
Watts (two PV ports)
Weight
~182
lb (70 lb inverter + 111.8 lb battery)
Our editorial rating: 90/100 · Check price at Amazon →
Amazon availability (checked October 31, 2026): the DELTA Pro Ultra appears only in bundle listings, and none had a live price or buy box. The DPU button opens the Smart Home Panel 2 bundle listing on Amazon.
Who Should Buy the DELTA Pro Ultra (and Who Should Skip It)
Buy it if you…
- ✓ Want to back up most of the house, including 240V loads such as a well pump or central air
- ✓ Plan a permanent install with Smart Home Panel 2 or a transfer switch (see our transfer switch guide)
- ✓ Have, or plan, a large solar array: 5,600W of input per inverter
- ✓ Want to grow capacity over time, from 6kWh up to 90kWh
- ✓ Face long, multi-day outages (see our home battery backup guide)
Skip it if you…
- ✗ Only need a fridge, furnace fan, lights and Wi-Fi. A 3–5kWh single unit covers that for less (see the alternatives below)
- ✗ Want to move it alone. The battery module alone is 111.8 lb
- ✗ Rent, or cannot have an electrician install a panel or transfer switch
- ✗ Want to buy from a live Amazon listing today
- ✗ Run heavy shop equipment with big start-up surges (see the surge note below)
EcoFlow DELTA Pro Ultra Specs
Figures come from EcoFlow’s published DELTA Pro Ultra specification sheet (US inverter model EFYJ751-PCS-US, battery EFYJ751-BP). Each one is cross-checked against at least one independent source: EcoFlow’s Amazon listings, Outbound Power’s retail listing or The Solar Lab’s review.
| Battery capacity | 6,144 Wh per battery module (102.4V, 60Ah) |
| Chemistry / cycle life | LFP (LiFePO4); 80%+ state of health after 3,500 cycles at 0.5C, 77°F |
| AC output | 7,200 W pure sine wave total, 120/240V, 60 Hz |
| Peak (surge) | 10,800 W per EcoFlow’s user manual (see the surge note below) |
| Outlets | 120V NEMA 5-20 outlets, TT-30 and L14-30 (120/240V, 30A) per retailer listings; USB-A 12W, USB-C 100W, 12.6V/30A DC (378W) |
| Solar input | High-voltage PV 80–450V, 15A, 4,000W max + low-voltage PV 30–150V, 15A, 1,600W max = 5,600 W per inverter |
| AC charging | 100–120V at 15A or 200–240V at 12.5A, plus a 30A power input/output port |
| UPS | Backup UPS under 20 ms; online UPS 0 ms |
| Expansion | Up to 5 batteries per inverter; up to 3 inverters with Smart Home Panel 2 = 90kWh and 21.6kW |
| Operating temperature | −4°F to 113°F (charge and discharge) |
| Noise / rating | Under 30 dB; IP54 (inverter and battery) |
| Connectivity | Wi-Fi, Bluetooth, Ethernet, 4G and CAN |
| Weight | Inverter 70 lb; battery 111.8 lb (two separate pieces) |
| Dimensions | Inverter 27.2 × 18.9 × 8.4 in; battery 26 × 18 × 8 in |
| Amazon price | Check price at Amazon → |
What we could not confirm: the exact count of each outlet type (retailers agree on the types but not the counts) and the warranty length. Warranty terms we found differ by sales channel, so check the listing or EcoFlow’s warranty page before you buy. Some non-US listings show lower output figures (6,000–6,900W) for regional models. This page uses the US 7,200W rating.
How Long Can the DELTA Pro Ultra Power a House?
Estimates use rated capacity × 0.85 for inverter losses, divided by the load: about 5,222Wh usable from one battery. The whole-home row uses the U.S. average household draw of about 1,230W, which works out from the EIA’s figure of roughly 899 kWh per month for a residential customer (EIA FAQ). Fridges and furnaces cycle on and off, so real runtimes are often longer than the continuous figures shown here.
| Load | Typical draw | 1 battery (6.1kWh) | 2 batteries (12.3kWh) | 5 batteries (30.7kWh) |
|---|---|---|---|---|
| Refrigerator (average while cycling) | ~150W | ~34.8 hrs | ~2.9 days | ~7.3 days |
| Essentials: fridge, furnace fan, lights, router | ~500W | ~10.4 hrs | ~20.9 hrs | ~2.2 days |
| Average U.S. home (all loads) | ~1,230W | ~4.2 hrs | ~8.5 hrs | ~21.2 hrs |
| Essentials + 1/2 HP well pump running | ~1,500W | ~3.5 hrs | ~7.0 hrs | ~17.4 hrs |
| 3-ton central AC (running, typical) | ~3,500W | ~1.5 hrs | ~3.0 hrs | ~7.5 hrs |
The takeaway: one battery gets a typical home through an evening, and an essentials-only load through most of a day. Multi-day outages need either extra batteries or solar. With 5,600W of panels in good sun, the DPU can put back a large share of a day’s use. For appliance-by-appliance sizing, see can a solar generator power a house; for heating loads, see power stations for a furnace.
Surge note: 10.8kW on paper, test results vary
EcoFlow’s user manual lists 7.2kW continuous and 10.8kW peak for one inverter. In The Solar Lab’s published test, a DPU held a 9,200W load for about 10 seconds before shutting down. The same review reported stuttering with a 2,200W car lift and shutdowns when several high-power tools ran at once. Household motor starts are brief, so most fridges, furnaces and well pumps are fine. Still, have an electrician check the locked-rotor amps of large motors before you count on it.
DELTA Pro Ultra + Smart Home Panel 2: How Whole-Home Backup Works
The DPU works as a standalone power station: plug appliances into its 120V outlets or its 30A L14-30. To back up household circuits automatically, it connects to EcoFlow’s Smart Home Panel 2. That panel installs next to your main breaker panel. Retailer listings describe it as covering 12 circuits, accepting up to three DPU inverters, and handling solar and generator inputs. EcoFlow’s spec sheet quotes a 20 ms backup switchover for the system. That is fast enough that lights and most appliances will not notice, but desktop PCs may reboot. The Amazon listing we key this review to (the DPU + Smart Home Panel 2 bundle) includes the panel.
Installation is not a DIY job. EcoFlow recommends a certified electrician for Smart Home Panel 2. Optional standby systems fall under Article 702 of the National Electrical Code, and most areas need a permit. Never backfeed a home through a dryer or wall outlet: the CPSC warns that backfeeding can electrocute utility workers and neighbors. If a panel is more than you need, a manual transfer switch or interlock fed from the L14-30 is the usual alternative. See our transfer switch guide.
Installer pricing: installed cost depends on your panel, local labor and permits. We did not find a source we could verify, so we do not quote a figure. Get a written quote from a licensed electrician.
DELTA Pro Ultra Alternatives Available on Amazon Now
The DPU’s Amazon bundles had no live price when we checked. These whole-home systems from our product database are listed with live Amazon pricing. Each trades some of the DPU’s capacity, output or expansion for a single wheeled unit you can order and plug in. Ratings are our editorial scores.
Closest EcoFlow alternative
EcoFlow Delta Pro 3
4,096Wh · 4,000W · 2,600W solar · 113.5 lb · Rating 95/100
The same EcoFlow app and Smart Home Panel 2 ecosystem in a single wheeled box: 4,096Wh, 4,000W of 120/240V output and 2,600W of solar input, expandable with extra batteries. Less capacity and output than the DPU, but it ships as one unit you can roll. Read our review →
Most capacity in one wheeled unit
Anker SOLIX S5000
5,024Wh · 4,500W · 3,000W solar · 97 lb · Rating 91/100
5,024Wh and 4,500W of 120V/240V output with 3,000W of solar input across two ports and UL 9540 certification. The closest single-box match to the DPU’s 6,144Wh battery. Read our review →
Most output after the DPU
Anker SOLIX F3800 Plus
3,840Wh · 6,000W · 3,200W solar · 136.7 lb · Rating 90/100
6,000W of output and 3,200W of solar input on a 3,840Wh battery, expandable with Anker’s add-on batteries. Heavy at 136.7 lb, but it rolls on its own wheels. Read our review →
Essential-circuit backup
Jackery HomePower 3600 Plus
3,584Wh · 3,600W · 1,200W solar · 78 lb · Rating 89/100
3,584Wh with 3,600W of output (7,200W surge), expandable to 21kWh. This Amazon listing bundles the station with two 200W panels. A good fit if you only back up essential circuits, not the whole panel. Read our review →
Lowest entry price for 240V
Bluetti Apex 300
2,765Wh · 3,840W · 2,400W solar · 83.8 lb · Rating 90/100
2,764.8Wh and 3,840W of output (7,680W surge), with 120V and 240V from a single unit and 2,400W of built-in solar input. Modular B300K batteries expand it to roughly 58kWh. Read our review →
DELTA Pro Ultra vs Delta Pro 3, Anker SOLIX S5000, F3800 Plus, HomePower 3600 Plus and Apex 300
| Model | Capacity | AC output | Solar in | 240V | Weight | Rating | Price | Amazon |
|---|---|---|---|---|---|---|---|---|
| EcoFlow DELTA Pro Ultra | 6,144 Wh | 7,200W | 5,600W | Yes | ~182 lb (2 pieces) | 90 | Check price at Amazon → | View → |
| EcoFlow Delta Pro 3 | 4,096 Wh | 4,000W | 2,600W | Yes | 113.5 lb | 95 | $2,799.00 | View → |
| Anker SOLIX S5000 | 5,024 Wh | 4,500W | 3,000W | Yes | 97 lb | 91 | $2,939.00 | View → |
| Anker SOLIX F3800 Plus | 3,840 Wh | 6,000W | 3,200W | See listing | 136.7 lb | 90 | Check price at Amazon → | View → |
| Jackery HomePower 3600 Plus | 3,584 Wh | 3,600W | 1,200W | See listing | 78 lb | 89 | $2,289.00 | View → |
| Bluetti Apex 300 | 2,765 Wh | 3,840W | 2,400W | Yes | 83.8 lb | 90 | $1,761.10 | View → |
“Yes” under 240V means the manufacturer’s Amazon listing states 120V/240V output. “See listing” means we have not confirmed it from the listing. More options: best whole-home solar generators.
DELTA Pro Ultra vs DELTA Pro 3: Which EcoFlow Should You Buy?
| Spec | DELTA Pro Ultra | DELTA Pro 3 |
|---|---|---|
| Capacity (base) | 6,144 Wh | 4,096 Wh |
| Continuous output | 7,200W, 120/240V | 4,000W, 120/240V |
| Solar input | 5,600W | 2,600W |
| Max expansion | 90kWh (3 inverters × 5 batteries) | 48kWh (maximum multi-unit configuration) |
| Form factor | Inverter + battery modules, ~182 lb total | Single wheeled unit, 113.5 lb |
| Our rating | 90/100 | 95/100 |
| Price now | Check price at Amazon → | $2,799.00 |
Choose the DELTA Pro 3 if you want EcoFlow’s app and Smart Home Panel 2 compatibility in one box that ships, rolls and plugs in. It covers a fridge, furnace, well pump and lights. Choose the DELTA Pro Ultra if you need more than 4,000W at once, want room to scale well past 20kWh, or have a large solar array. The Delta Pro 3 is currently $2,799.00 on Amazon, a known number you can budget for. Full details are in our Delta Pro 3 review and which EcoFlow Delta to buy.
DELTA Pro Ultra X: What’s Different?
The DELTA Pro Ultra X is EcoFlow’s higher-output successor. We only list what we could confirm in two or more sources (EcoFlow’s US product page, plus retail listings from Outbound Power and Wellbots):
- 12kW output per inverter, up from 7.2kW on the DPU
- Up to 10kW of solar input, up from 5.6kW
- Uses 6,144Wh battery modules, the same capacity per module as the DPU
- Adds a NEMA 14-50 (50A) outlet alongside 5-20 and L14-30 outlets, per retailer spec sheets
Total expansion limits and peak ratings for the Ultra X differ between listings, so we leave them out. We have not verified an Amazon listing for the Ultra X, so this page does not link to one. If 7.2kW is too little for your home, for example two large AC condensers starting together, the Ultra X is the EcoFlow to look at. Otherwise the DPU or a Delta Pro 3 covers most homes.
EcoFlow DELTA Pro Ultra Pros & Cons
What We Like
- • 7,200W at 120/240V from one inverter, with no add-on hub needed for 240V
- • 5,600W solar input across high- and low-voltage ports
- • Scales from 6kWh to 90kWh as your budget allows
- • LFP rated 3,500 cycles to 80% state of health
- • Quiet: under 30 dB by spec; The Solar Lab called it one of the quietest units it has tested
- • Wi-Fi, Ethernet and 4G monitoring, plus Smart Home Panel 2 circuit control
What Could Be Better
- • ~182 lb across inverter and battery; not a portable power station in practice
- • Amazon: bundles only, with no live price when we checked
- • Surge headroom fell short of the 10.8kW figure in The Solar Lab’s test
- • Whole-home use needs an electrician and usually a permit
- • Solar input is low relative to a fully expanded stack, so add inverters to add PV
Which DELTA Pro Ultra Amazon Bundle to Look For
We matched three Amazon listings to the DELTA Pro Ultra by title. On October 31, 2026, none showed a price or buy box, so these links open the listing and may say “Currently unavailable.”
- DPU + Smart Home Panel 2 (the listing this review is keyed to): the whole-home configuration. View listing →
- DPU + Smart Home Panel (first generation): an older panel pairing. View listing →
- DPU + 400W portable solar panel: for off-grid or cabin use without a panel install. View listing →
EcoFlow has historically run its largest promotions around Black Friday. Our EcoFlow Black Friday tracker follows the models with live Amazon listings. For every EcoFlow model in one place, see the EcoFlow power station guide.
How We Rated the DELTA Pro Ultra
We do not physically test products. Our 90/100 rating comes from our 6-dimension scoring matrix, applied to EcoFlow’s published specs, Amazon listing data and public third-party reviews. The DPU scores at or near the top of our database on capacity and power, expandability and solar input. It loses points on portability, and on value because it has no live Amazon price we can score against. If a priced listing returns, we will re-score it.
EcoFlow DELTA Pro Ultra FAQ
Is the EcoFlow DELTA Pro Ultra worth it?
For a permanent whole-home backup system, often yes. It pairs a 6,144Wh LiFePO4 battery with a 7,200W 120/240V inverter, takes up to 5,600W of solar and grows to 90kWh, which few consumer systems match. It is not worth it if you want a portable unit or a simple plug-in purchase. The inverter and battery weigh about 182 lb together, and Smart Home Panel 2 needs an electrician. Most buyers backing up a fridge, furnace and lights will spend less on an EcoFlow Delta Pro 3 or an Anker SOLIX S5000.
How long will the EcoFlow DELTA Pro Ultra power a house?
One 6,144Wh battery gives about 5,222Wh usable after inverter losses. That is about 4.2 hours at the U.S. average household draw of roughly 1,230W (EIA: about 899 kWh per month), about 10.4 hours on a 500W essentials load such as a fridge, furnace fan, lights and router, and about 1.5 days for a refrigerator alone. Five batteries on one inverter multiply those figures by five.
Can the DELTA Pro Ultra run central air conditioning?
EcoFlow says one inverter can run a 3-ton central air conditioner, and its 7,200W continuous rating covers the running load of most residential units. Start-up surge is the limit to check. EcoFlow lists 10.8kW peak, and The Solar Lab reported that its unit held a 9,200W load for about 10 seconds before shutting down. Check your condenser's locked-rotor amps (LRA) with an electrician; a soft starter can cut the inrush.
What is the difference between the DELTA Pro Ultra and the DELTA Pro 3?
The DELTA Pro Ultra is a two-piece modular system: a 7,200W inverter on top of 6,144Wh battery modules, scalable to 90kWh with three inverters. The DELTA Pro 3 is a single wheeled 4,096Wh unit with 4,000W of 120/240V output and 2,600W of solar input. The Ultra has more power and capacity; the Delta Pro 3 is far easier to buy, move and set up.
What is the EcoFlow DELTA Pro Ultra X?
The DELTA Pro Ultra X is EcoFlow's newer, higher-output version. EcoFlow and retailer listings give it 12kW of output per inverter and up to 10kW of solar input, and it uses 6,144Wh battery modules. Retailer spec sheets add a NEMA 14-50 50A outlet. We have not verified an Amazon listing for it, so we do not link to one.
Do you need Smart Home Panel 2 for the DELTA Pro Ultra?
Not to use it as a standalone power station. You can plug appliances into its outlets. To back up household circuits automatically, you need Smart Home Panel 2 or a transfer switch, and EcoFlow recommends a certified electrician for the installation. Connecting any battery or generator to home wiring without a transfer switch or interlock risks backfeeding the grid, which the CPSC warns can electrocute utility workers.
How long does the DELTA Pro Ultra take to charge?
EcoFlow's Amazon listing says one 6,144Wh battery can recharge in about 2 hours, a figure that assumes several inputs combined. The spec sheet lists AC charging at 15A on 120V (about 1,800W) or 12.5A on 240V, plus up to 5,600W of solar. The Solar Lab reported just over 4 hours for a full recharge from a 120V wall supply.
Where can I buy the EcoFlow DELTA Pro Ultra on Amazon?
Amazon lists it in bundles: with Smart Home Panel 2, with the original Smart Home Panel, and with a 400W solar panel. None showed a live price or buy box when we checked on October 31, 2026, so our links fall back to "Check price at Amazon." The in-stock alternatives on this page show live prices.
Sources: EcoFlow DELTA Pro Ultra specification sheet, US models EFYJ751-PCS-US and EFYJ751-BP (capacity, output, PV ports, AC input, UPS, weights, dimensions, cycle life, temperatures, IP54, connectivity); EcoFlow US product pages for the DELTA Pro Ultra and DELTA Pro Ultra X; EcoFlow’s Amazon listings for the three DPU bundles (90kWh, 21.6kW with three inverters, 2-hour charge claim, 3,500 cycles); Outbound Power and Wellbots retail listings (DPU 6,144Wh/7,200W/5.6kW; Ultra X 12kW/10kW and outlets); retailer FAQs (outlet types); The Solar Lab DELTA Pro Ultra test (surge, AC charge time, noise); EIA residential consumption FAQ; CPSC portable generator safety guide. SolarGenAdvisor does not physically test products; the rating is AI-assisted and editor-reviewed.