Capacity
Higher is better | Scale max: 6,144 Wh | Delta Pro Ultra X leads
DELTA Pro 3 4,096 Wh
Delta Pro Ultra X 6,144 Wh
Delta Pro Ultra X: +2,048 Wh (+50.0%).
DELTA Pro 3 vs Delta Pro Ultra X
VS
4,000W
Running power
12,000W
4,096 Wh
Battery
6,144 Wh
113.5 lbs
Weight
187.4 lbs
At a Glance
This comparison targets buyers choosing between two high-capacity EcoFlow LFP stations for serious home backup or off-grid use. The Delta Pro Ultra X delivers 12,000W of running power and 24,000W surge, tripling the Pro 3's 4,000W output and making it capable of running every one of the 53 devices we tested.
The Pro 3 handled 48 of 53, falling short on the most demanding loads. Solar charging further separates them: the Ultra X accepts up to 10,000W of solar input and can recharge its 6,144 Wh battery in roughly 7.3 hours, while the Pro 3 tops out at 2,600W input and needs about 14.6 hours to fill 4,096 Wh.
The tradeoff is weight and manageability. At 113.5 lbs the Pro 3 is still heavy, but it is meaningfully easier to position than the 187.4 lb Ultra X.
Overall Winner
Delta Pro Ultra X
Powers 53 of 53 tested devices vs 48 for DELTA Pro 3
Home backup: Delta Pro Ultra X RV / mobile: DELTA Pro 3 Solar: Delta Pro Ultra X
Delta Pro Ultra X wins overall, but the best pick depends on your use case.
Choose DELTA Pro 3 if...
- + Portability matters (114 lbs vs 187)
Choose Delta Pro Ultra X if...
- + You want faster solar recharging
- + You want broader device compatibility
- + You need all-day runtime headroom
Spec Snapshot
Absolute values shown. Bars are scaled within this comparison for readability.
Each metric is independent. Bar lengths are not comparable across different compare pages.
Running Power
Higher is better | Scale max: 12,000 W | Delta Pro Ultra X leads
DELTA Pro 3 4,000 W
Delta Pro Ultra X 12,000 W
Delta Pro Ultra X: +8,000 W (+200.0%).
Surge Power
Higher is better | Scale max: 24,000 W | Delta Pro Ultra X leads
DELTA Pro 3 8,000 W
Delta Pro Ultra X 24,000 W
Delta Pro Ultra X: +16,000 W (+200.0%).
Weight
Lower is better | Scale best: 113.5 lbs | DELTA Pro 3 leads
DELTA Pro 3 113.5 lbs (51.5 kg)
Delta Pro Ultra X 187.4 lbs (85.0 kg)
DELTA Pro 3: -73.9 lbs (39.4% lighter).
Battery Life
Higher is better | Scale max: 4,000 cycles | DELTA Pro 3 leads
DELTA Pro 3 4,000 cycles
Delta Pro Ultra X 3,200 cycles
DELTA Pro 3: +800 cycles (+25.0%).
Where Compatibility Actually Differs
Out of 53 devices tested, 5 show a different result between these two stations.
Both can run: 48 · Differences: 9% (5/53)
Only Delta Pro Ultra X can run 5
Central AC (3-Ton) DELTA Pro 3: Running + surge shortfall
Electric Water Heater (50 Gal) DELTA Pro 3: Running shortfall
Electric Clothes Dryer DELTA Pro 3: Running shortfall
RV Rooftop AC (13,500 BTU) DELTA Pro 3: Needs soft-start
Pancake Air Compressor (6-Gallon) DELTA Pro 3: Needs soft-start
Full Specs Comparison
| Spec | DELTA Pro 3 | Delta Pro Ultra X |
|---|---|---|
| Capacity | 4,096 Wh | 6,144 Wh ✓ |
| Running Power | 4,000 W | 12,000 W ✓ |
| Surge Power | 8,000 W | 24,000 W ✓ |
| Weight | 113.5 lbs (51.5 kg) ✓ | 187.4 lbs (85.0 kg) |
| Energy Density | 79.5 Wh/kg ✓ | 72.3 Wh/kg |
| Portability Tier | stationary | stationary |
| Chemistry | LFP | LFP |
| Cycle Life | 4,000 ✓ | 3,200 |
| Expandable | Yes | Yes |
| UPS | No | No |
| AC Voltage | 120V/240V | 120V/240V |
Solar Charging
Best-case charging profile using compatible solar panels.
DELTA Pro 3
Max solar input 2,600 W
Connector XT60 + XT60i
Full charge time ~14.6h
Compatible panels 20/20
MPPT: 30-150V
Delta Pro Ultra X
Faster Max solar input 10,000 W
Connector MC4
Full charge time ~7.3h
Compatible panels 20/20
MPPT: 80-500V
Charge speed comparison
Longer bar = faster charge (inverted scale)
Device Compatibility
All tested devices grouped by category. Click a category to expand.
DELTA Pro 3Delta Pro Ultra X
Emergency(2)
2/22/2
2/2
2/2
Entertainment(2)
2/22/2
2/2
2/2
EV & Transportation(2)
2/22/2
2/2
2/2
Heating & Cooling(7)
6/77/7
6/7
7/7
| Device | DELTA Pro 3 | Runtime | Delta Pro Ultra X | Runtime |
|---|---|---|---|---|
| Box Fan (20-inch) | Safe | 34.5h | Safe | 51.8h |
| Central AC (3-Ton) | Fail | N/A | Tight | 1.1h |
| Dehumidifier (70 Pint) | Safe | 3.3h | Safe | 5h |
| Gas Furnace Fan (Blower) | Safe | 2.7h | Safe | 4.1h |
| Portable AC (12,000 BTU) | Safe | 2.1h | Safe | 3.2h |
| Space Heater (1,500W) | Safe | 1.9h | Safe | 2.9h |
| Window AC (8,000 BTU) | Safe | 4h | Safe | 6.1h |
Home Infrastructure(3)
2/33/3
2/3
3/3
Kitchen Appliances(11)
11/1111/11
11/11
11/11
| Device | DELTA Pro 3 | Runtime | Delta Pro Ultra X | Runtime |
|---|---|---|---|---|
| 2-Slice Bread Toaster | Safe | 1.9h | Safe | 2.9h |
| Coffee Maker | Safe | 1.8h | Safe | 2.7h |
| Digital Air Fryer | Safe | 1.7h | Safe | 2.5h |
| Electric Skillet | Safe | 1.9h | Safe | 2.9h |
| Electric Stove (Single Burner) | Safe | 1.6h | Safe | 2.4h |
| Electric Water Kettle | Safe | 1.9h | Safe | 2.9h |
| Instant Pot (6 Qt) | Safe | 2h | Safe | 2.9h |
| Microwave Oven (1000W) | Safe | 1.5h | Safe | 2.2h |
| Rice Cooker | Safe | 3h | Safe | 4.6h |
| Slow Cooker | Safe | 9.6h | Safe | 14.3h |
| Toaster Oven | Safe | 1.6h | Safe | 2.4h |
Large Appliances(4)
3/44/4
3/4
4/4
Medical(4)
4/44/4
4/4
4/4
Outdoor & RV(6)
5/66/6
5/6
6/6
Personal Care(2)
2/22/2
2/2
2/2
Power Tools(5)
4/55/5
4/5
5/5
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The Bottom Line
Pick the DELTA Pro 3 if your loads stay under 4,000W and portability matters; its lighter frame and 4,000-cycle longevity suit moderate home backup or mobile setups. Go with the Delta Pro Ultra X if you need whole-home coverage, fast solar recharge, or the ability to power high-draw appliances without compromise. With a score of 105 to the Pro 3's 96 and full 53-device compatibility, the Ultra X is the stronger overall choice.
DELTA Pro 3 vs Delta Pro Ultra X FAQ
Q Which is better for home backup, DELTA Pro 3 or Delta Pro Ultra X?
Delta Pro Ultra X is the stronger overall choice in this matchup based on weighted compatibility across 53 tested devices.
Q Which has longer runtime, DELTA Pro 3 or Delta Pro Ultra X?
Delta Pro Ultra X has higher battery capacity (6,144 Wh), which generally supports longer runtime on the same load.
Q Which charges faster with solar panels?
Delta Pro Ultra X has the faster best-case solar recharge profile in our panel compatibility test set.
Q Which is more portable, DELTA Pro 3 or Delta Pro Ultra X?
DELTA Pro 3 is lighter at 113.5 lbs vs 187.4 lbs. DELTA Pro 3 is rated stationary for portability.
Q How many devices can each power station run?
Delta Pro Ultra X powers 53 of 53 tested devices, compared to 48 for DELTA Pro 3.