Head-to-Head · 2026 · Updated November 13, 2026
EcoFlow Delta Pro 3 vs Delta Pro Ultra
For most homes, the Delta Pro 3 is the one to buy: 4,096 Wh and 4,000W at 120/240V in one wheeled box. The Delta Pro Ultra is EcoFlow’s larger whole-home system, with 7,200W and room to grow to 90kWh, built for homes whose loads outgrow 4,000W. On November 11, 2026, its Amazon listings showed “Currently unavailable.”
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By Quick Verdict
Best for most homes · 95/100
EcoFlow Delta Pro 3
Our highest-rated station. 120/240V from one 113.5 lb unit, 8,000W surge, and up to 12,288 Wh per unit with two extra batteries. In stock on Amazon on November 11, 2026.
- ✓ Your essential loads stay under 4,000W at once
- ✓ You want one box you can roll, not a two-piece install
- ✓ About 12kWh per unit is enough headroom
Larger whole-home system · 90/100
EcoFlow DELTA Pro Ultra
A modular inverter-plus-battery system: 7,200W at 120/240V, 5,600W of solar, and up to five 6,144 Wh batteries per inverter. Amazon status, November 11, 2026: all three Ultra listings showed “Currently unavailable.”
- ✓ Your loads go past 4,000W at the same time
- ✓ You plan to grow well past 12kWh, up to 90kWh
- ✓ You have a large roof array (up to 5,600W per inverter)
Bottom line
Both are 120/240V LiFePO4 systems that work with EcoFlow’s Smart Home Panel 2, so the choice comes down to size. The Delta Pro 3 covers a typical essentials list (fridge, furnace blower, well pump, lights, internet) and is the one you can order today. The Delta Pro Ultra makes sense for homes that need 7,200W at once or a battery bank in the tens of kilowatt-hours. If you are not sure which camp you are in, total your loads in our solar size calculator first.
Specs Side by Side
Every figure comes from our product database, which is sourced from EcoFlow’s manuals and spec sheets, retailer spec tables and Amazon listings. The original Delta Pro is included because many buyers compare all three.
| Delta Pro 3 | Delta Pro Ultra | Delta Pro (original) | |
|---|---|---|---|
| Capacity | 4,096 Wh | 6,144 Wh per battery | 3,600 Wh |
| Continuous AC output | 4,000W, 120/240V | 7,200W, 120/240V ✓ | 3,600W, 120V |
| Surge / peak | 8,000W | 10,800W ✓ | 7,200W |
| Max solar input | 2,600W (2 inputs) | 5,600W (2 inputs) ✓ | 1,600W (1 input) |
| 240V | Built in | Built in | Two units + Double Voltage Hub |
| Extra batteries per unit | Up to 2 (12,288 Wh max) | Up to 5 (30,720 Wh max) ✓ | Up to 2 (10,800 Wh max) |
| System ceiling (EcoFlow) | 48kWh, 12kW with three units | 90kWh, 21.6kW with three inverters ✓ | Two units on the Double Voltage Hub |
| Form factor | One wheeled unit ✓ | Inverter + battery, stacked | One wheeled unit |
| Weight | 113.5 lb | 181.8 lb (two pieces) | 99 lb ✓ |
| Chemistry | LiFePO4 | LiFePO4 | LiFePO4 |
| Our rating | 95/100 ✓ | 90/100 | 87/100 |
| Amazon, November 11, 2026 | In stock | Currently unavailable (all 3 listings) | In stock, limited quantity |
| Current price on Amazon | Check price at Amazon → | Check price at Amazon → | $1,799.00 |
Delta Pro Ultra weight is the inverter (about 70 lb) plus one battery (about 112 lb), per EcoFlow’s spec sheet; they are separate pieces. Its listing on Amazon is a bundle with Smart Home Panel 2. System ceilings are EcoFlow’s figures (Delta Pro 3 launch release; Outbound Power on the Ultra; the Ultra’s Amazon title). Sources for the solar split: Delta Pro 3 US manual, quick start guide, EcoFlow’s answers on Best Buy.
Amazon Availability on November 11, 2026
Stock for these systems changes week to week, so here is exactly what Amazon’s product data showed when we checked on November 11, 2026. Check the listing before you plan around any of them.
- Delta Pro 3: in stock, new, sold by Amazon.com.
- Delta Pro Ultra: all three listings we match to it (with Smart Home Panel 2, with the first-generation Smart Home Panel, and with a 400W solar panel) showed “Currently unavailable.” We found no EcoFlow statement that the model is discontinued, so we do not describe it that way.
- Delta Pro Ultra X: in stock, with Amazon showing limited quantity.
- Original Delta Pro: in stock, with Amazon showing limited quantity.
If you need backup this winter and your loads fit under 4,000W, the Delta Pro 3 is the option you can order now. If you need Ultra-class output, the in-stock Ultra X is covered below.
What the Delta Pro Ultra Does Better
The Ultra is a different class of product, not just a bigger Delta Pro 3. EcoFlow splits it into a stacking inverter and separate battery modules, which is what lets it scale.
- 3,200W more continuous output. 7,200W vs 4,000W, and 10,800W vs 8,000W of surge. That gap is what lets a home run several large 240V loads at the same time.
- More than twice the solar ceiling. 5,600W per inverter (a 4,000W high-voltage input plus a 1,600W low-voltage input, per Outbound Power and The Solar Lab) vs 2,600W on the Delta Pro 3.
- Much bigger battery bank per unit. One inverter takes up to five 6,144 Wh batteries, about 30.7kWh. A Delta Pro 3 tops out at 12.3kWh with two extra batteries.
- Higher system ceiling. Three Ultra inverters reach 90kWh and 21.6kW, per EcoFlow’s Amazon listing. Three Delta Pro 3 units reach 12kW, per EcoFlow’s launch release.
The trade-offs. It is a permanent install in practice: about 182 lb across two pieces, and whole-home use needs an electrician. Its 90/100 also reflects that we had no live Amazon price to score its value against. Our Delta Pro Ultra review has the full breakdown, including its solar array math.
Where the Delta Pro 3 Wins
- One box. The inverter and the first 4,096 Wh live in one 113.5 lb wheeled unit, so you can roll it into the garage now and wire it in later.
- Same 120/240V and the same home panel. Both feed a 240V well pump or dryer circuit through a transfer switch, and both work with Smart Home Panel 2. Up to three Delta Pro 3 units can share one panel, per the US manual.
- Reuses old batteries. EcoFlow’s manual says the Delta Pro 3 is “backwards compatible with the DELTA Pro Smart Extra Battery,” so an owner of the original Delta Pro can carry its packs over.
- You can buy it today. It was in stock on Amazon on November 11, 2026, and it is the highest-rated product in our scoring at 95/100.
One manual detail to plan around
On the US Delta Pro 3, the 240V (HV) and 120V (LV) outlet groups have separate buttons that, per the manual, “cannot be used at the same time.” While the L14-30R outlet feeds your transfer switch, the front 120V outlets are off. Put everything on the transfer switch circuits rather than running extension cords from the front.
For how to connect it (transfer switch, Smart Home Panel 2 or two units on the 50 Amp Hub), see our Delta Pro 3 home backup setup guide. For panel wiring and charge times on its two solar inputs, see the best solar panels for the Delta Pro 3.
Runtime: How Long Each Setup Lasts
Hours at a steady average load, using rated Wh × 0.85 (inverter and conversion losses) ÷ load in watts. Real runtime varies with temperature and how often motors cycle. A dash means the load is above that unit’s continuous output.
| Setup | Capacity | 500W | 1,000W | 2,500W | 5,000W |
|---|---|---|---|---|---|
| Delta Pro 3 | 4,096 Wh | 7.0 h | 3.5 h | 1.4 h | — |
| Delta Pro 3 + 2 extra batteries (per-unit max) | 12,288 Wh | 20.9 h | 10.4 h | 4.2 h | — |
| Delta Pro Ultra (1 battery) | 6,144 Wh | 10.4 h | 5.2 h | 2.1 h | 1.0 h |
| Delta Pro Ultra + 1 extra battery | 12,288 Wh | 20.9 h | 10.4 h | 4.2 h | 2.1 h |
| Original Delta Pro | 3,600 Wh | 6.1 h | 3.1 h | 1.2 h | — |
At the same 12,288 Wh, a fully expanded Delta Pro 3 and an Ultra with one extra battery last the same time. The differences are the output ceiling (only the Ultra can carry the 5,000W column) and the headroom: the Delta Pro 3 is at its single-unit limit there, while the Ultra can take three more batteries. We use 500W to 1,000W only as a rough planning range for essentials like a fridge, furnace blower, lights and internet; your own average can be higher or lower. Total your own list in the solar size calculator.
Which One for Your Home
Essentials backup through a transfer switch
Delta Pro 3
The pick. 4,000W at 120/240V covers the usual essentials list, and the L14-30R outlet matches common 30A transfer switch kits.
Delta Pro Ultra
More than most essentials setups need, and a two-piece install to get there.
Large simultaneous loads (central AC, well pump and range together)
Delta Pro 3
Tight. If those loads add up past 4,000W, you need a second unit or a smaller circuit list.
Delta Pro Ultra
The pick. 7,200W continuous, and inverters can be stacked for more.
Big rooftop or ground-mount solar array
Delta Pro 3
2,600W across two inputs is plenty for a portable or small fixed array.
Delta Pro Ultra
5,600W per inverter, with a 4,000W high-voltage input, suits a permanent array.
Growing the system over the years
Delta Pro 3
Up to two extra batteries per unit (including original Delta Pro packs), or more units on Smart Home Panel 2.
Delta Pro Ultra
Up to five batteries per inverter and three inverters, for EcoFlow’s 90kWh ceiling.
Buying this month
Delta Pro 3
In stock on Amazon on November 11, 2026.
Delta Pro Ultra
All three Amazon listings showed “Currently unavailable” on November 11, 2026. The Ultra X kit was in stock.
Delta Pro 3 vs the Original Delta Pro
The Delta Pro 3 replaced the 2021 Delta Pro at the top of EcoFlow’s single-unit range, and the older model is still sold on Amazon. In short:
- 240V: built into the Delta Pro 3. The Delta Pro is 120V on its own and needs a second unit plus EcoFlow’s Double Voltage Hub for 240V.
- Capacity and output: 4,096 Wh and 4,000W vs 3,600 Wh and 3,600W.
- Solar: 2,600W on two inputs vs 1,600W on one.
- Weight: the older Delta Pro is lighter, 99 lb vs 113.5 lb.
- Rating: 95/100 vs 87/100 in our scoring.
Pick the original Delta Pro if 120V covers your loads and a lower price matters most. Pick the Delta Pro 3 for 240V from one box or more solar. Our EcoFlow Delta Pro review covers the older model in depth, including its extra battery and Double Voltage Hub setup, and our which EcoFlow Delta should I buy guide lines up the smaller Delta models.
What About the Delta Pro Ultra X?
The Ultra X is EcoFlow’s newer, higher-output version of the Ultra. On Amazon it is sold as a kit with one inverter and two batteries: 12,288 Wh, 12,000W at 120/240V and up to 10,000W of solar, rated 91/100 in our scoring. It was in stock on November 11, 2026, with limited quantity. It is a whole-home system priced well above either unit on this page, so it only makes sense if you were shopping for the Ultra anyway. Our Delta Pro Ultra X review covers it.
How We Score These
We do not physically test products. Our ratings come from our 6-dimension scoring matrix (capacity and power, value, solar charging, portability, expandability and battery chemistry), applied to published specs, Amazon listing data and Amazon customer reviews. The Delta Pro 3 is the highest-rated product in our database. The Ultra scores at or near the top on capacity, solar and expandability, and loses points on portability and on value because it had no live Amazon price to score. For other systems in this class, see our smart home panel guide and EcoFlow extra battery guide.
Sources: EcoFlow DELTA Pro 3 user manual, US version (PDF hosted by a reseller); DELTA Pro 3 quick start guide; EcoFlow Team answers on Best Buy; EcoFlow Delta Pro 3 launch release; The Solar Lab Delta Pro 3 review; Outbound Power, DELTA Pro vs DELTA Pro Ultra; Outbound Power, Ultra extra battery listing; The Solar Lab Delta Pro Ultra review; CPSC portable generator safety; Amazon product data checked November 11, 2026.
Delta Pro 3 vs Delta Pro Ultra: FAQ
Which is better, the EcoFlow Delta Pro 3 or the Delta Pro Ultra?
For most homes, the Delta Pro 3. It gives you 4,096 Wh, 4,000W at 120/240V and 2,600W of solar in one wheeled box, it scores 95/100 in our scoring, and it was in stock on Amazon on November 11, 2026. The Delta Pro Ultra (90/100) is the bigger system: 7,200W of continuous output, 5,600W of solar and up to 90kWh. Pick it only if your simultaneous loads go past 4,000W or you plan to grow well past 12kWh.
Is the EcoFlow Delta Pro Ultra out of stock or discontinued?
On November 11, 2026, all three Amazon listings we match to the Delta Pro Ultra (with Smart Home Panel 2, with the first-generation Smart Home Panel, and with a 400W panel) showed “Currently unavailable.” We found no EcoFlow statement that the model is discontinued, so we do not call it that. EcoFlow’s higher-output Delta Pro Ultra X kit was in stock on Amazon the same day, with limited quantity.
Can the Delta Pro 3 run a whole house?
It can run the essential circuits of most houses through a transfer switch or EcoFlow’s Smart Home Panel 2: fridge, furnace blower, well or sump pump, lights and internet. At 1,000W of average load, one Delta Pro 3 lasts about 3.5 hours, or about 10.4 hours with two extra batteries (rated Wh × 0.85 ÷ load). Large 240V loads running together, such as central air plus an electric range, can add up to more than its 4,000W, which is where the Delta Pro Ultra or a second Delta Pro 3 comes in.
Can I use my old Delta Pro extra batteries with the Delta Pro 3?
Yes, according to EcoFlow’s US Delta Pro 3 manual, which says the station is “backwards compatible with the DELTA Pro Smart Extra Battery” and accepts up to two extra batteries. Delta Pro Ultra batteries are a different, larger module and are not listed as compatible with the Delta Pro 3.
Delta Pro 3 vs the original Delta Pro: which should I buy?
The Delta Pro 3 if you want 240V from one unit, 2,600W of solar, or a single-unit Smart Home Panel 2 setup. The original Delta Pro is 120V only on its own (240V needs two units and EcoFlow’s Double Voltage Hub) and takes 1,600W of solar, but it costs less and was in stock on Amazon on November 11, 2026. Our Delta Pro review covers the older model in depth.
Do I need an electrician for either one?
Yes, for anything that feeds your house wiring. Both connect through a transfer switch, an interlock kit or EcoFlow’s Smart Home Panel 2, and those are installed by a licensed electrician, usually with a permit. The CPSC warns that backfeeding a house through an outlet is dangerous to you and to utility workers. Plugging appliances straight into the station’s outlets needs no installation.