Capacity
Higher is better | Scale max: 6,144 Wh | Delta Pro Ultra leads
DELTA 2 Max 2,048 Wh
Delta Pro Ultra 6,144 Wh
Delta Pro Ultra: +4,096 Wh (+200.0%).
DELTA 2 Max vs Delta Pro Ultra
VS
2,400W
Running power
6,000W
2,048 Wh
Battery
6,144 Wh
50.7 lbs
Weight
182.1 lbs
At a Glance
This comparison targets buyers deciding between a midsize portable power station and a full-scale home backup system, both from EcoFlow and built on LFP chemistry. The Delta Pro Ultra delivers 6000W of running power and 6144 Wh of capacity, tripling the DELTA 2 Max on both counts.
It powered 52 of 53 tested devices versus 45 for the DELTA 2 Max, earning a higher overall score of 102 to 88.5. Solar input tells a similar story: the Pro Ultra accepts up to 5600W, more than five times the 1000W ceiling on the DELTA 2 Max, yet its full solar charge time is only modestly longer at 8 hours versus 7.3.
The tradeoff is physical: at 182.1 lbs, the Pro Ultra is roughly 3.6 times heavier than the 50.7 lb DELTA 2 Max, making it essentially stationary once placed.
Overall Winner
Delta Pro Ultra
Powers 52 of 53 tested devices vs 45 for DELTA 2 Max
Home backup: Delta Pro Ultra RV / mobile: DELTA 2 Max Solar: Delta Pro Ultra
Delta Pro Ultra wins overall, but the best pick depends on your use case.
Choose DELTA 2 Max if...
- + Portability matters (51 lbs vs 182)
Choose Delta Pro Ultra 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: 6,000 W | Delta Pro Ultra leads
DELTA 2 Max 2,400 W
Delta Pro Ultra 6,000 W
Delta Pro Ultra: +3,600 W (+150.0%).
Surge Power
Higher is better | Scale max: 12,000 W | Delta Pro Ultra leads
DELTA 2 Max 4,800 W
Delta Pro Ultra 12,000 W
Delta Pro Ultra: +7,200 W (+150.0%).
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 182.1 lbs (82.6 kg)
DELTA 2 Max: -131.4 lbs (72.2% lighter).
Battery Life
Higher is better | Scale max: 3,200 cycles | Delta Pro Ultra leads
DELTA 2 Max 3,000 cycles
Delta Pro Ultra 3,200 cycles
Delta Pro Ultra: +200 cycles (+6.7%).
Where Compatibility Actually Differs
Out of 53 devices tested, 7 show a different result between these two stations.
Both can run: 45 · Differences: 13% (7/53) · Neither can run: 1
Only Delta Pro Ultra can run 7
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
Electric Clothes Dryer DELTA 2 Max: Voltage mismatch
RV Rooftop AC (13,500 BTU) DELTA 2 Max: Surge shortfall
Neither can run · 1 devices
These are 240V or high-voltage devices — neither station supports them.
Central AC (3-Ton)
Full Specs Comparison
| Spec | DELTA 2 Max | Delta Pro Ultra |
|---|---|---|
| Capacity | 2,048 Wh | 6,144 Wh ✓ |
| Running Power | 2,400 W | 6,000 W ✓ |
| Surge Power | 4,800 W | 12,000 W ✓ |
| Weight | 50.7 lbs (23.0 kg) ✓ | 182.1 lbs (82.6 kg) |
| Energy Density | 89.0 Wh/kg ✓ | 74.4 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
Faster Max solar input 1,000 W
Connector XT60i
Full charge time ~7.3h
Compatible panels 19/20
MPPT: 11-60V
Delta Pro Ultra
Max solar input 5,600 W
Connector MC4
Full charge time ~8.0h
Compatible panels 20/20
MPPT: 80-450V
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
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)
6/76/7
6/7
6/7
| Device | DELTA 2 Max | Runtime | Delta Pro Ultra | Runtime |
|---|---|---|---|---|
| Box Fan (20-inch) | Safe | 17.3h | Safe | 51.8h |
| Central AC (3-Ton) | Voltage Fail | N/A | Fail | N/A |
| 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 | Runtime |
|---|---|---|---|---|
| Electric Water Heater (50 Gal) | Voltage Fail | N/A | Tight | 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 | 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
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The Bottom Line
The DELTA 2 Max suits users who need a capable, portable unit for camping, tailgating, or light home backup, with enough power at 2400W to run most standard appliances. The Delta Pro Ultra is the pick for whole-home backup or heavy-duty off-grid setups that demand 6000W continuous output and broad device coverage. Between the two, the Delta Pro Ultra is the stronger choice for buyers who prioritize capacity, power output, and near-total device compatibility over portability.
DELTA 2 Max vs Delta Pro Ultra FAQ
Q Which is better for home backup, DELTA 2 Max or Delta Pro Ultra?
Delta Pro Ultra 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?
Delta Pro Ultra 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 Max 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?
DELTA 2 Max is lighter at 50.7 lbs vs 182.1 lbs. DELTA 2 Max is rated portable for portability.
Q How many devices can each power station run?
Delta Pro Ultra powers 52 of 53 tested devices, compared to 45 for DELTA 2 Max.