EcoFlow DELTA 3 Ultra Plus
A 3,072 Wh LFP power station for 120 V homes with 3,600 W of AC output, 1,600 W of solar input, expansion to 11 kWh and a 5-year warranty.
- Best for expandable backup
- Power station
- 3-11 kWh
- 3,600 W
- Made by EcoFlow.
- Capacity: 3,072 Wh (51.2 V, 60 Ah) with LFP cells, expandable from 3 to 11 kWh through one extra battery port (expandable to two).
- Output: 3,600 W continuous at 120 V 60 Hz, 7,200 W surge, and up to 4,600 W with X-Boost. Adds Smart Output Priority and an Anderson DC port.
- Six ways to charge: wall at 1,800 W, solar up to 1,600 W, generator up to 3,200 W, alternator up to 1,000 W, and combined inputs (80% in 48 minutes with solar plus a Smart Generator 4000).
- Sold in the United States. EcoFlow's page said it ships in mid-December 2026 and that it is not CARB-approved, so it cannot ship to California.
Not tested by us
We have not tested the EcoFlow DELTA 3 Ultra Plus. The figures on this page come from the sources listed at the end of the page, checked on 13 November 2026, and we do not show prices. "Best for" is based on what the maker says the product is designed for, not on our own tests.
Key figures
3,072 Wh
Capacity (expandable to 11 kWh)
3,600 W
AC output (7,200 W surge)
5 years
Warranty
Specifications
Last checked on 13 November 2026. The grey text under each name explains what the value means. To see it next to other products, compare it in our comparison tool.
| Specification | Value |
|---|---|
| Storage | |
| CapacityHow much energy the battery stores. Bigger means longer runtime or more of your own solar power used later. | 3,072 Wh (51.2 V, 60 Ah) |
| Battery chemistryLFP (lithium iron phosphate) cells are known for long life and stable behaviour with heat. | LFP (LiFePO4), automotive-grade full-tab cells, 16-cell design per kWh. EcoFlow estimates a lifespan of about 10 years from internal simulation data, for reference only |
| Cycle lifeHow many full charge and discharge cycles the cells are rated for before they hold less than the stated share of their original capacity. | Not stated |
| ExpansionExtra battery units that add storage to the same system. | 1 extra battery port (expandable to 2). 3 to 11 kWh with 2 x DELTA Pro 3 Extra Battery. Compatible extra batteries: DELTA 3 Max Plus (2,048 Wh), DELTA Pro 3, DELTA 3 Series and DELTA 2 Max Smart Extra Batteries. EcoFlow notes that connecting two extra batteries needs an Extra Battery Expansion Adapter that it said would be released soon |
| Output | |
| AC output (continuous)The power it can deliver all the time. Add up the watts of what you want to run at once and stay below this. | 3,600 W total at 120 V 60 Hz: 4 outlets at 20 A max each and 1 outlet at 30 A max (TT-30R, for RVs) |
| AC output (surge)A short burst above the continuous rating, for appliances that draw more power when they start. | 7,200 W |
| X-BoostA mode that can run some devices above the normal output rating by lowering the voltage it supplies. Not suitable for every device. | Runs devices up to 4,600 W (X-Boost 3.0) |
| X-FusionWhile it is plugged into the grid or a generator, the inverter can supply more than a standard plug passes through, so one outlet can deliver its full rated power. | Yes (X-Fusion 3.0): in bypass mode with a grid or generator input, the inverter overrides it and supplies up to 3,600 W through one outlet |
| Smart Output PriorityLets you choose in the app which circuits stay powered, so non-essential loads shut off and the essentials run longer. | Yes. Choose which circuits stay powered via the app and shut off non-essential loads during outages |
| USB-APorts for phones, tablets and small devices. | 1 port, 18 W max |
| USB-CPorts for laptops, phones and tablets. Power delivery up to 100 W can charge most laptops. | 1 port, 140 W max (HID), plus 2 ports at 45 W max each, 45 W in total |
| Car outletA 12 V socket like the one in a car, for car accessories. | 1 outlet, 12.6 V 10 A, 126 W max, plus an Anderson port at 12.6 V 30 A; 378 W in total for the 12 V ports, shared |
| Total outletsHow many output ports it has in total, counting AC, USB and DC. | 11 outlets |
| Charging | |
| AC chargingHow fast it charges from a wall socket. Higher means a shorter wait. | 1,800 W (input voltage not stated on the specification page) |
| Time to charge from the mainsHow long a full charge takes from a wall socket. | 80% in 91 minutes and 100% in 120 minutes |
| Solar inputHow much solar panel power it accepts. A higher figure fills the battery faster on a sunny day. | 1,600 W max (dual solar input) |
| Solar charging timeHow long a full charge takes from solar panels, in the conditions the maker names. | Not stated for solar alone. Solar plus a Smart Generator 4000 (3,960 W input) reaches 80% in 48 minutes |
| Generator chargingHow fast it can charge from a petrol or dual-fuel generator. Higher means a shorter wait with a generator running. | 3,200 W max: 80% in 53 minutes and 100% in 76 minutes with the Smart Generator 4000. Auto Start/Stop with the Smart Generator 3000 and 4000 |
| Car chargingCharging from a car's 12 V or 24 V socket while driving. Slow, but useful on the road. | Alternator charging up to 1,000 W through the 4+8 port; solar plus alternator dual charging |
| Backup switchover (EPS)What happens when the grid fails. EPS means it takes over automatically. | Under 10 ms (UPS) |
| Backup in a power cutWhether it can keep selected circuits running during a grid outage. | Powers devices directly from its outlets, or runs home circuits through a Manual Transfer Switch (sold separately) or an Inlet Box |
| Solar and off-grid | |
| Works with solar panelsWhether you can charge it from solar panels. Yes means a built-in solar input or a compatible solar setup; read the detail for the voltage and power limits. | Yes: built-in solar input, 1,600 W max (dual input). |
| Off-grid useWhether the maker describes it running with no grid connection at all, for example in a cabin, van or off-grid home. Backup only means it covers power cuts but needs the grid the rest of the time. | Yes: runs devices from its own battery with no mains connection and recharges from solar, a generator or an alternator. |
| Housing and warranty | |
| Dimensions (H × W × D)Check the wall or floor space before you buy, including room for airflow and cables. | 613.1 × 327.71 × 394.95 mm (listed by EcoFlow as height × width × depth) |
| WeightMatters for lifting, wall mounting and moving it. | 33.7 ± 0.6 kg |
| Operating temperatureThe range it is rated to work in. Cold and heat can reduce performance. | Charging 0 to 45 °C, discharging -10 to 45 °C, storage -10 to 45 °C; optimal operating range 20 to 30 °C. EcoFlow also lists 95% humidity tolerance, 5% salt spray resistance and a drop-resistant (0.2 m) cell-to-chassis structure |
| Noise levelFan noise while working. | 25 dB or less at 600 W (measured at 1 m, 25 °C) |
| Protection ratingIP ratings show protection from dust and water. IP55 and IP65 are rated for outdoor-style exposure; check the installation guidance. | Not stated |
| ConnectivityHow you monitor and control it, usually through an app. | Wi-Fi and Bluetooth; EcoFlow app (OASIS 3.0) with energy dashboard, Storm Guard Mode, Self-Powered Mode and scheduled charging |
| CertificationsSafety and grid standards the maker says the product meets. | Class B EMC; certified to UL 2743 and verified by SGS, according to EcoFlow |
| WarrantyThe period the maker covers. Read the terms: conditions and capacity guarantees differ. | 5 years (3-year standard warranty plus 2 years extra after registering in the EcoFlow app) |
How long will it run your devices?
Choose how many of each device you want to run at the same time. The wattages are typical figures, so check the label on your own devices.
| Device | Typical power | How many |
|---|---|---|
| 10 W | ||
| 10 W | ||
| 15 W | ||
| 60 W | ||
| 80 W | ||
| 80 W | ||
| 40 W | ||
| 1,000 W | ||
| 2,000 W | ||
| 1,000 W | ||
| W |
The estimate assumes 85% of the rated capacity is usable after conversion losses. EcoFlow does not state this figure, so we use a cautious assumption. Real running times vary with temperature, battery age and how each device draws power.
Compatible with
What EcoFlow says this product works with. Anything not listed here is not confirmed.
- Extra batteries
- DELTA 3 Max Plus (2,048 Wh), DELTA Pro 3, DELTA 3 Series and DELTA 2 Max Smart Extra Batteries. One port, expandable to two; up to 11 kWh with 2 x DELTA Pro 3 Extra Battery.
- Solar panels
- Dual solar input up to 1,600 W. EcoFlow lists its 110 W, 160 W NextGen, 220 W NextGen bifacial and 400 W portable panels, and a 500 W panel in bundles.
- Smart Generators
- EcoFlow Smart Generator 3000 and 4000 (Dual Fuel), with Generator Auto Start/Stop that switches between fuel and battery.
- Alternator chargers
- EcoFlow lists its 500 W, 600 W, 800 W and Plus 1000 alternator chargers as compatible accessories; this model charges from an alternator at up to 1,000 W.
- Home connection
- Manual Transfer Switch (sold separately; a 30 A transfer switch is listed as an add-on) or an Inlet Box.
Rules where you live
This is the 120 V, 60 Hz model that EcoFlow sells in the United States, so it will not suit a 230 V grid without a different regional version. A power station is not wired into your home on its own: EcoFlow says it connects to a home through a Manual Transfer Switch or an Inlet Box, and the rules for that vary by country and state. See our country guides for the rules, incentives and prices where you live.
Strengths and things to check
Strengths
- 3,600 W continuous, 4,600 W with X-Boost
- Expandable from 3 to 11 kWh
- Up to 1,600 W solar and 3,200 W generator charging
- Smart Output Priority and Generator Auto Start/Stop
- Anderson DC port for RV and vehicle gear
- 10 ms UPS switchover, 25 dB or less at 600 W
- 5-year warranty
Worth checking before you buy
- Weighs about 33.7 kg
- US 120 V 60 Hz version, not CARB-approved, no shipping to California
- Ships from mid-December 2026 according to EcoFlow's page
- Reaching 11 kWh needs an expansion adapter that EcoFlow listed as coming soon
- No cycle life or protection rating stated
Change log
We record changes to this page here, so you can see when figures such as the warranty were last updated.
- 13 November 2026
- Page published. Warranty at publication: 5 years (EcoFlow US product page). EcoFlow's US page said the DELTA 3 Ultra Plus ships in mid-December 2026 and that it is not CARB-approved and cannot ship to California.
Where this information comes from
We have not tested the DELTA 3 Ultra Plus. Every figure above comes from EcoFlow's own pages: the specification page and product page for the DELTA 3 Ultra Plus on its US site, the DELTA 3 Ultra Series page and EcoFlow's DELTA 3 Ultra FAQ, last checked on 13 November 2026. These pages cover both the DELTA 3 Ultra and the Ultra Plus; we only show the Ultra Plus values. A value that the pages do not state is shown as not stated.
We do not show prices, because they change often and differ between sellers.
- Manufacturer EcoFlow US DELTA 3 Ultra Plus specification page
- Manufacturer EcoFlow US DELTA 3 Ultra Plus and DELTA 3 Ultra FAQ
- Manufacturer EcoFlow US DELTA 3 Ultra Plus product page
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Common questions about EcoFlow DELTA 3 Ultra Plus
How much can the DELTA 3 Ultra Plus store?
One unit holds 3,072 Wh. EcoFlow lists expansion from 3 to 11 kWh through one extra battery port (expandable to two), with the DELTA 3 Max Plus, DELTA Pro 3, DELTA 3 and DELTA 2 Max extra batteries. Two extra batteries need an expansion adapter that EcoFlow said would be released soon.
What can the DELTA 3 Ultra Plus run?
EcoFlow rates it at 3,600 W continuous and 7,200 W surge at 120 V, with X-Boost reaching 4,600 W for suitable devices. It lists a 200 W refrigerator for 12 to 24 hours. Divide the stored energy by the load for a rough running time.
What is the difference between the DELTA 3 Ultra Plus and the Ultra?
On EcoFlow's table the Plus adds battery expansion, 1,600 W of solar input (the Ultra takes 800 W), 3,200 W generator charging, an Anderson DC port, Smart Output Priority and Generator Auto Start/Stop. It is slightly heavier, at 33.7 kg against 32.7 kg. Both hold 3,072 Wh and output 3,600 W.
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