Capacity
Higher is better | Scale max: 6,144 Wh | Delta Pro Ultra leads
DELTA 2 1,024 Wh
Delta Pro Ultra 6,144 Wh
Delta Pro Ultra: +5,120 Wh (+500.0%).
DELTA 2 vs Delta Pro Ultra
VS
1,800W
Running power
6,000W
1,024 Wh
Battery
6,144 Wh
26.5 lbs
Weight
182.1 lbs
At a Glance
This comparison targets buyers choosing between a portable mid-range unit and a full-scale home backup system within EcoFlow's lineup. The Delta Pro Ultra delivers 6,000W of running power and 6,144 Wh of capacity, dwarfing the DELTA 2's 1,800W output and 1,024 Wh battery. That gap shows up in device coverage: the Pro Ultra powered 52 of 53 tested devices, while the DELTA 2 handled 39 of 53.
Solar input tells a similar story, with the Pro Ultra accepting up to 5,600W compared to 500W on the DELTA 2. The tradeoff is size and mobility. At 26.5 lbs, the DELTA 2 is genuinely portable, whereas the Pro Ultra tips the scales at 182.1 lbs, making it a stationary solution for most owners.
Both use LFP chemistry and offer expandable capacity, so longevity and flexibility are shared strengths.
Overall Winner
Delta Pro Ultra
Powers 52 of 53 tested devices vs 39 for DELTA 2
Home backup: Delta Pro Ultra RV / mobile: DELTA 2 Solar: Tie
Delta Pro Ultra wins overall, but the best pick depends on your use case.
Choose DELTA 2 if...
- + Portability matters (27 lbs vs 182)
- + You want faster solar recharging
Choose Delta Pro Ultra 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: 6,000 W | Delta Pro Ultra leads
DELTA 2 1,800 W
Delta Pro Ultra 6,000 W
Delta Pro Ultra: +4,200 W (+233.3%).
Surge Power
Higher is better | Scale max: 12,000 W | Delta Pro Ultra leads
DELTA 2 2,700 W
Delta Pro Ultra 12,000 W
Delta Pro Ultra: +9,300 W (+344.4%).
Weight
Lower is better | Scale best: 26.5 lbs | DELTA 2 leads
DELTA 2 26.5 lbs (12.0 kg)
Delta Pro Ultra 182.1 lbs (82.6 kg)
DELTA 2: -155.6 lbs (85.5% lighter).
Battery Life
Higher is better | Scale max: 3,200 cycles | Delta Pro Ultra leads
DELTA 2 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, 13 show a different result between these two stations.
Both can run: 39 · Differences: 25% (13/53) · Neither can run: 1
Only Delta Pro Ultra can run 13
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
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
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 | Delta Pro Ultra |
|---|---|---|
| Capacity | 1,024 Wh | 6,144 Wh ✓ |
| Running Power | 1,800 W | 6,000 W ✓ |
| Surge Power | 2,700 W | 12,000 W ✓ |
| Weight | 26.5 lbs (12.0 kg) ✓ | 182.1 lbs (82.6 kg) |
| Energy Density | 85.3 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
Faster Max solar input 500 W
Connector XT60i
Full charge time ~3.7h
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 2Delta Pro Ultra
Emergency(2)
1/22/2
1/2
2/2
| Device | DELTA 2 | Runtime | Delta Pro Ultra | 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)
4/76/7
4/7
6/7
| Device | DELTA 2 | Runtime | Delta Pro Ultra | Runtime |
|---|---|---|---|---|
| Box Fan (20-inch) | Safe | 8.6h | Safe | 51.8h |
| Central AC (3-Ton) | Voltage Fail | N/A | Fail | N/A |
| 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 | Runtime |
|---|---|---|---|---|
| Electric Water Heater (50 Gal) | Voltage Fail | N/A | Tight | 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 | 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 fits buyers who need a grab-and-go station for camping, tailgating, or light home use, and its 3.7-hour solar charge time makes off-grid trips practical with a single panel. The Delta Pro Ultra suits homeowners planning whole-house backup or heavy-load applications where 6,000W sustained output and 12,000W surge capacity are non-negotiable. With a compatibility score of 102 versus 73.5 and coverage across nearly every device tested, the Delta Pro Ultra is the clear winner for raw capability.
DELTA 2 vs Delta Pro Ultra FAQ
Q Which is better for home backup, DELTA 2 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 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 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?
DELTA 2 is lighter at 26.5 lbs vs 182.1 lbs. DELTA 2 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 39 for DELTA 2.