Capacity
Higher is better | Scale max: 6,144 Wh | Tie
Delta Pro Ultra 6,144 Wh
Delta Pro Ultra X 6,144 Wh
Delta: Tie (0%).
Delta Pro Ultra vs Delta Pro Ultra X
VS
6,000W
Running power
12,000W
6,144 Wh
Battery
6,144 Wh
182.1 lbs
Weight
187.4 lbs
At a Glance
This comparison targets homeowners and off-grid users deciding between two of EcoFlow's heaviest hitters. Both the Delta Pro Ultra and Delta Pro Ultra X share 6144 Wh of LFP battery capacity, 3200-cycle longevity, and expandable architectures, but the similarities end at raw output.
The Ultra X doubles running power to 12,000W and surge capacity to 24,000W, making it capable of handling full-panel loads and high-draw appliances that the standard Ultra's 6,000W output cannot. Solar input tells a similar story: the Ultra X accepts up to 10,000W versus 5,600W, trimming estimated solar charge time to around 7.3 hours compared to 8 hours.
In device compatibility testing across 53 appliances, the Ultra X powered every single one; the Ultra fell one short at 52. The tradeoff is modest: the Ultra X weighs about 5 pounds more at 187.4 lbs, a negligible difference given neither unit is truly portable.
Overall Winner
Delta Pro Ultra X
Powers 53 of 53 tested devices vs 52 for Delta Pro Ultra
Home backup: Tie RV / mobile: Tie Solar: Delta Pro Ultra X
Choose Delta Pro Ultra if...
- + Portability matters for your setup
Choose Delta Pro Ultra X if...
- + You want faster solar recharging
- + You want broader device compatibility
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 Ultra 6,000 W
Delta Pro Ultra X 12,000 W
Delta Pro Ultra X: +6,000 W (+100.0%).
Surge Power
Higher is better | Scale max: 24,000 W | Delta Pro Ultra X leads
Delta Pro Ultra 12,000 W
Delta Pro Ultra X 24,000 W
Delta Pro Ultra X: +12,000 W (+100.0%).
Weight
Lower is better | Scale best: 182.1 lbs | Delta Pro Ultra leads
Delta Pro Ultra 182.1 lbs (82.6 kg)
Delta Pro Ultra X 187.4 lbs (85.0 kg)
Delta Pro Ultra: -5.3 lbs (2.8% lighter).
Battery Life
Higher is better | Scale max: 3,200 cycles | Tie
Delta Pro Ultra 3,200 cycles
Delta Pro Ultra X 3,200 cycles
Delta: Tie (0%).
Compatibility Coverage
These two stations produce the same result on 52 of 53 devices. There is 1 difference.
Both can run: 52 · Differences: 2% (1/53)
Full Specs Comparison
| Spec | Delta Pro Ultra | Delta Pro Ultra X |
|---|---|---|
| Capacity | 6,144 Wh | 6,144 Wh |
| Running Power | 6,000 W | 12,000 W ✓ |
| Surge Power | 12,000 W | 24,000 W ✓ |
| Weight | 182.1 lbs (82.6 kg) ✓ | 187.4 lbs (85.0 kg) |
| Energy Density | 74.4 Wh/kg ✓ | 72.3 Wh/kg |
| Portability Tier | stationary | stationary |
| Chemistry | LFP | LFP |
| Cycle Life | 3,200 | 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 Ultra
Max solar input 5,600 W
Connector MC4
Full charge time ~8.0h
Compatible panels 20/20
MPPT: 80-450V
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 UltraDelta 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 Ultra | Runtime | Delta Pro Ultra X | Runtime |
|---|---|---|---|---|
| Box Fan (20-inch) | Safe | 51.8h | Safe | 51.8h |
| Central AC (3-Ton) | Fail | N/A | Tight | 1.1h |
| Dehumidifier (70 Pint) | Safe | 5h | Safe | 5h |
| Gas Furnace Fan (Blower) | Safe | 4.1h | Safe | 4.1h |
| Portable AC (12,000 BTU) | Safe | 3.2h | Safe | 3.2h |
| Space Heater (1,500W) | Safe | 2.9h | Safe | 2.9h |
| Window AC (8,000 BTU) | Safe | 6.1h | Safe | 6.1h |
Home Infrastructure(3)
3/33/3
3/3
3/3
Kitchen Appliances(11)
11/1111/11
11/11
11/11
| Device | Delta Pro Ultra | Runtime | Delta Pro Ultra X | Runtime |
|---|---|---|---|---|
| 2-Slice Bread Toaster | Safe | 2.9h | Safe | 2.9h |
| Coffee Maker | Safe | 2.7h | Safe | 2.7h |
| Digital Air Fryer | Safe | 2.5h | Safe | 2.5h |
| Electric Skillet | Safe | 2.9h | Safe | 2.9h |
| Electric Stove (Single Burner) | Safe | 2.4h | Safe | 2.4h |
| Electric Water Kettle | Safe | 2.9h | Safe | 2.9h |
| Instant Pot (6 Qt) | Safe | 2.9h | Safe | 2.9h |
| Microwave Oven (1000W) | Safe | 2.2h | Safe | 2.2h |
| Rice Cooker | Safe | 4.6h | Safe | 4.6h |
| Slow Cooker | Safe | 14.3h | Safe | 14.3h |
| Toaster Oven | Safe | 2.4h | Safe | 2.4h |
Large Appliances(4)
4/44/4
4/4
4/4
Medical(4)
4/44/4
4/4
4/4
Outdoor & RV(6)
6/66/6
6/6
6/6
Personal Care(2)
2/22/2
2/2
2/2
Power Tools(5)
5/55/5
5/5
5/5
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The Bottom Line
The Delta Pro Ultra suits buyers whose loads stay comfortably under 6,000W and who want a capable whole-home backup without the extra output overhead. The Delta Pro Ultra X is the pick for anyone running demanding circuits, large HVAC systems, or stacking serious solar arrays up to 10,000W. With perfect 53-of-53 device coverage, double the running watts, and a higher overall score of 105 versus 102, the Delta Pro Ultra X is the stronger choice for most high-capacity scenarios.
Delta Pro Ultra vs Delta Pro Ultra X FAQ
Q Which is better for home backup, Delta Pro Ultra 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 Ultra or Delta Pro Ultra X?
Both have similar battery capacity, so runtime depends on the specific device load and efficiency factors.
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 Ultra or Delta Pro Ultra X?
Delta Pro Ultra is lighter at 182.1 lbs vs 187.4 lbs. Delta Pro Ultra 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 52 for Delta Pro Ultra.