Capacity
Higher is better | Scale max: 6,144 Wh | Delta Pro Ultra X leads
DELTA 2 Max 2,048 Wh
Delta Pro Ultra X 6,144 Wh
Delta Pro Ultra X: +4,096 Wh (+200.0%).
DELTA 2 Max vs Delta Pro Ultra X
VS
2,400W
Running power
12,000W
2,048 Wh
Battery
6,144 Wh
50.7 lbs
Weight
187.4 lbs
At a Glance
This comparison targets buyers choosing between a mid-capacity portable power station and a full-scale home backup system, both from EcoFlow. The Delta Pro Ultra X delivers 12,000W of running power and 6,144 Wh of battery capacity, dwarfing the DELTA 2 Max at 2,400W and 2,048 Wh. That five-to-one power advantage means the Ultra X powered every one of 53 tested devices, while the DELTA 2 Max handled 45 of 53.
Solar input tells a similar story: the Ultra X accepts up to 10,000W of solar, compared to 1,000W for the DELTA 2 Max. Both use LFP chemistry with similar cycle life (3,200 vs. 3,000). The tradeoff is weight and mobility.
At 50.7 lbs, the DELTA 2 Max is genuinely portable for camping, tailgating, or job sites, while the 187.4 lb Ultra X is a stationary unit built for whole-home backup.
Overall Winner
Delta Pro Ultra X
Powers 53 of 53 tested devices vs 45 for DELTA 2 Max
Home backup: Delta Pro Ultra X RV / mobile: DELTA 2 Max Solar: Delta Pro Ultra X
Delta Pro Ultra X wins overall, but the best pick depends on your use case.
Choose DELTA 2 Max if...
- + Portability matters (51 lbs vs 187)
Choose Delta Pro Ultra X if...
- + You want faster solar recharging
- + 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 Max 2,400 W
Delta Pro Ultra X 12,000 W
Delta Pro Ultra X: +9,600 W (+400.0%).
Surge Power
Higher is better | Scale max: 24,000 W | Delta Pro Ultra X leads
DELTA 2 Max 4,800 W
Delta Pro Ultra X 24,000 W
Delta Pro Ultra X: +19,200 W (+400.0%).
Weight
Lower is better | Scale best: 50.7 lbs | DELTA 2 Max leads
DELTA 2 Max 50.7 lbs (23.0 kg)
Delta Pro Ultra X 187.4 lbs (85.0 kg)
DELTA 2 Max: -136.7 lbs (72.9% lighter).
Battery Life
Higher is better | Scale max: 3,200 cycles | Delta Pro Ultra X leads
DELTA 2 Max 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, 8 show a different result between these two stations.
Both can run: 45 · Differences: 15% (8/53)
Only Delta Pro Ultra X can run 8
Circular Saw (Corded) DELTA 2 Max: Surge shortfall
Electric Chainsaw (14-inch) DELTA 2 Max: Surge shortfall
Pancake Air Compressor (6-Gallon) DELTA 2 Max: Needs soft-start
Electric Water Heater (50 Gal) DELTA 2 Max: Voltage mismatch
Well Pump (1 HP) DELTA 2 Max: Voltage mismatch
Central AC (3-Ton) DELTA 2 Max: Voltage mismatch
Electric Clothes Dryer DELTA 2 Max: Voltage mismatch
RV Rooftop AC (13,500 BTU) DELTA 2 Max: Surge shortfall
Full Specs Comparison
| Spec | DELTA 2 Max | Delta Pro Ultra X |
|---|---|---|
| Capacity | 2,048 Wh | 6,144 Wh ✓ |
| Running Power | 2,400 W | 12,000 W ✓ |
| Surge Power | 4,800 W | 24,000 W ✓ |
| Weight | 50.7 lbs (23.0 kg) ✓ | 187.4 lbs (85.0 kg) |
| Energy Density | 89.0 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 Max
Max solar input 1,000 W
Connector XT60i
Full charge time ~7.3h
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 2 MaxDelta 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 2 Max | Runtime | Delta Pro Ultra X | Runtime |
|---|---|---|---|---|
| Box Fan (20-inch) | Safe | 17.3h | Safe | 51.8h |
| Central AC (3-Ton) | Voltage Fail | N/A | Tight | 1.1h |
| Dehumidifier (70 Pint) | Safe | 1.7h | Safe | 5h |
| Gas Furnace Fan (Blower) | Safe | 1.4h | Safe | 4.1h |
| Portable AC (12,000 BTU) | Tight | 1.1h | Safe | 3.2h |
| Space Heater (1,500W) | Safe | 1h | Safe | 2.9h |
| Window AC (8,000 BTU) | Safe | 2h | Safe | 6.1h |
Home Infrastructure(3)
1/33/3
1/3
3/3
| Device | DELTA 2 Max | Runtime | Delta Pro Ultra X | Runtime |
|---|---|---|---|---|
| Electric Water Heater (50 Gal) | Voltage Fail | N/A | Safe | 0.8h |
| Garage Door Opener (Residential) | Safe | 8h | Safe | 23.9h |
| Well Pump (1 HP) | Voltage Fail | N/A | Safe | 1.8h |
Kitchen Appliances(11)
11/1111/11
11/11
11/11
| Device | DELTA 2 Max | Runtime | Delta Pro Ultra X | Runtime |
|---|---|---|---|---|
| 2-Slice Bread Toaster | Safe | 1h | Safe | 2.9h |
| Coffee Maker | Safe | 0.9h | Safe | 2.7h |
| Digital Air Fryer | Safe | 0.8h | Safe | 2.5h |
| Electric Skillet | Safe | 1h | Safe | 2.9h |
| Electric Stove (Single Burner) | Safe | 0.8h | Safe | 2.4h |
| Electric Water Kettle | Safe | 1h | Safe | 2.9h |
| Instant Pot (6 Qt) | Safe | 1h | Safe | 2.9h |
| Microwave Oven (1000W) | Safe | 0.7h | Safe | 2.2h |
| Rice Cooker | Safe | 1.5h | Safe | 4.6h |
| Slow Cooker | Safe | 4.8h | Safe | 14.3h |
| Toaster Oven | Safe | 0.8h | 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)
2/55/5
2/5
5/5
As an Amazon Associate, we earn from qualifying purchases. Our methodology
The Bottom Line
The DELTA 2 Max suits buyers who need a portable, expandable battery they can carry to a campsite or deploy during short outages, with enough capacity to cover most standard appliances. The Delta Pro Ultra X is the right pick for homeowners who want to run high-draw systems like HVAC, EV chargers, or full kitchen circuits off solar or grid power. With a score of 105 versus 88.5 and complete device coverage, the Delta Pro Ultra X is the clear winner in this matchup.
DELTA 2 Max vs Delta Pro Ultra X FAQ
Q Which is better for home backup, DELTA 2 Max 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 Max 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 2 Max or Delta Pro Ultra X?
DELTA 2 Max is lighter at 50.7 lbs vs 187.4 lbs. DELTA 2 Max 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 45 for DELTA 2 Max.