Capacity
Higher is better | Scale max: 6,144 Wh | Delta Pro Ultra X leads
DELTA 2 1,024 Wh
Delta Pro Ultra X 6,144 Wh
Delta Pro Ultra X: +5,120 Wh (+500.0%).
DELTA 2 vs Delta Pro Ultra X
VS
1,800W
Running power
12,000W
1,024 Wh
Battery
6,144 Wh
26.5 lbs
Weight
187.4 lbs
At a Glance
This comparison targets buyers deciding between a portable, mid-capacity power station and a heavy-duty whole-home backup system, both from EcoFlow. The DELTA 2 delivers 1800W of running power from a 1024 Wh LFP battery, weighing just 26.5 lbs. The Delta Pro Ultra X scales up dramatically to 12,000W running power and 6,144 Wh of capacity, with a surge rating of 24,000W.
In device compatibility testing across 53 appliances, the Pro Ultra X powered every single one, while the DELTA 2 handled 39 of 53. Solar input tells a similar story: the Pro Ultra X accepts up to 10,000W of solar compared to 500W on the DELTA 2. Both units use LFP chemistry with similar cycle life (3,000 vs. 3,200), and both are expandable.
The tradeoff is significant: the Pro Ultra X weighs 187.4 lbs, making it a stationary installation rather than a grab-and-go solution.
Overall Winner
Delta Pro Ultra X
Powers 53 of 53 tested devices vs 39 for DELTA 2
Home backup: Delta Pro Ultra X RV / mobile: DELTA 2 Solar: Tie
Delta Pro Ultra X wins overall, but the best pick depends on your use case.
Choose DELTA 2 if...
- + Portability matters (27 lbs vs 187)
- + You want faster solar recharging
Choose Delta Pro Ultra X if...
- + You need 240V-capable loads
- + 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 2 1,800 W
Delta Pro Ultra X 12,000 W
Delta Pro Ultra X: +10,200 W (+566.7%).
Surge Power
Higher is better | Scale max: 24,000 W | Delta Pro Ultra X leads
DELTA 2 2,700 W
Delta Pro Ultra X 24,000 W
Delta Pro Ultra X: +21,300 W (+788.9%).
Weight
Lower is better | Scale best: 26.5 lbs | DELTA 2 leads
DELTA 2 26.5 lbs (12.0 kg)
Delta Pro Ultra X 187.4 lbs (85.0 kg)
DELTA 2: -160.9 lbs (85.9% lighter).
Battery Life
Higher is better | Scale max: 3,200 cycles | Delta Pro Ultra X leads
DELTA 2 3,000 cycles
Delta Pro Ultra X 3,200 cycles
Delta Pro Ultra X: +200 cycles (+6.7%).
Where Compatibility Actually Differs
Out of 53 devices tested, 14 show a different result between these two stations.
Both can run: 39 · Differences: 26% (14/53)
Only Delta Pro Ultra X can run 14
Circular Saw (Corded) DELTA 2: Surge shortfall
Corded Drill / Hammer Drill DELTA 2: Surge shortfall
Electric Chainsaw (14-inch) DELTA 2: Surge shortfall
Pancake Air Compressor (6-Gallon) DELTA 2: Surge shortfall
Shop Vac (Wet/Dry, 5-6 HP Peak) DELTA 2: Surge shortfall
Central AC (3-Ton) DELTA 2: Voltage mismatch
Dehumidifier (70 Pint) DELTA 2: Needs soft-start
Portable AC (12,000 BTU) DELTA 2: Needs soft-start
Electric Water Heater (50 Gal) DELTA 2: Voltage mismatch
Well Pump (1 HP) DELTA 2: Voltage mismatch
Sump Pump (1/2 HP) DELTA 2: Needs soft-start
Microwave Oven (1000W) DELTA 2: Running shortfall
Electric Clothes Dryer DELTA 2: Voltage mismatch
RV Rooftop AC (13,500 BTU) DELTA 2: Surge shortfall
Full Specs Comparison
| Spec | DELTA 2 | Delta Pro Ultra X |
|---|---|---|
| Capacity | 1,024 Wh | 6,144 Wh ✓ |
| Running Power | 1,800 W | 12,000 W ✓ |
| Surge Power | 2,700 W | 24,000 W ✓ |
| Weight | 26.5 lbs (12.0 kg) ✓ | 187.4 lbs (85.0 kg) |
| Energy Density | 85.3 Wh/kg ✓ | 72.3 Wh/kg |
| Portability Tier | portable | stationary |
| Chemistry | LFP | LFP |
| Cycle Life | 3,000 | 3,200 ✓ |
| Expandable | Yes | Yes |
| UPS | No | No |
| AC Voltage | 120V | 120V/240V |
Solar Charging
Best-case charging profile using compatible solar panels.
DELTA 2
Faster Max solar input 500 W
Connector XT60i
Full charge time ~3.7h
Compatible panels 19/20
MPPT: 11-60V
Delta Pro Ultra X
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 2Delta Pro Ultra X
Emergency(2)
1/22/2
1/2
2/2
| Device | DELTA 2 | Runtime | Delta Pro Ultra X | Runtime |
|---|---|---|---|---|
| Full-Size Freezer (15-17 Cu. Ft.) | Safe | 4.5h | Safe | 26.9h |
| Sump Pump (1/2 HP) | Soft Start | 0.6h | Safe | 3.8h |
Entertainment(2)
2/22/2
2/2
2/2
EV & Transportation(2)
2/22/2
2/2
2/2
Heating & Cooling(7)
4/77/7
4/7
7/7
| Device | DELTA 2 | Runtime | Delta Pro Ultra X | Runtime |
|---|---|---|---|---|
| Box Fan (20-inch) | Safe | 8.6h | Safe | 51.8h |
| Central AC (3-Ton) | Voltage Fail | N/A | Tight | 1.1h |
| Dehumidifier (70 Pint) | Soft Start | 0.8h | Safe | 5h |
| Gas Furnace Fan (Blower) | Tight | 0.7h | Safe | 4.1h |
| Portable AC (12,000 BTU) | Soft Start | 0.5h | Safe | 3.2h |
| Space Heater (1,500W) | Safe | 0.5h | Safe | 2.9h |
| Window AC (8,000 BTU) | Safe | 1h | Safe | 6.1h |
Home Infrastructure(3)
1/33/3
1/3
3/3
| Device | DELTA 2 | Runtime | Delta Pro Ultra X | Runtime |
|---|---|---|---|---|
| Electric Water Heater (50 Gal) | Voltage Fail | N/A | Safe | 0.8h |
| Garage Door Opener (Residential) | Safe | 4h | Safe | 23.9h |
| Well Pump (1 HP) | Voltage Fail | N/A | Safe | 1.8h |
Kitchen Appliances(11)
10/1111/11
10/11
11/11
| Device | DELTA 2 | Runtime | Delta Pro Ultra X | Runtime |
|---|---|---|---|---|
| 2-Slice Bread Toaster | Safe | 0.5h | Safe | 2.9h |
| Coffee Maker | Safe | 0.4h | Safe | 2.7h |
| Digital Air Fryer | Tight | 0.4h | Safe | 2.5h |
| Electric Skillet | Safe | 0.5h | Safe | 2.9h |
| Electric Stove (Single Burner) | Tight | 0.4h | Safe | 2.4h |
| Electric Water Kettle | Safe | 0.5h | Safe | 2.9h |
| Instant Pot (6 Qt) | Safe | 0.5h | Safe | 2.9h |
| Microwave Oven (1000W) | Fail | N/A | Safe | 2.2h |
| Rice Cooker | Safe | 0.8h | Safe | 4.6h |
| Slow Cooker | Safe | 2.4h | Safe | 14.3h |
| Toaster Oven | Tight | 0.4h | 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)
0/55/5
0/5
5/5
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The Bottom Line
The DELTA 2 suits campers, remote workers, and anyone who needs a portable backup that covers common electronics and small appliances at 26.5 lbs. The Delta Pro Ultra X is built for homeowners who want to run high-draw systems like HVAC, kitchens, and workshops off solar or grid backup. With a perfect 53/53 device pass rate and a score of 105 versus 73.5, the Delta Pro Ultra X is the clear winner for total coverage and power capacity.
DELTA 2 vs Delta Pro Ultra X FAQ
Q Which is better for home backup, DELTA 2 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 2 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 2 has the faster best-case solar recharge profile in our panel compatibility test set.
Q Which is more portable, DELTA 2 or Delta Pro Ultra X?
DELTA 2 is lighter at 26.5 lbs vs 187.4 lbs. DELTA 2 is rated portable for portability.
Q How many devices can each power station run?
Delta Pro Ultra X powers 53 of 53 tested devices, compared to 39 for DELTA 2.