Capacity
Higher is better | Scale max: 6,144 Wh | Delta Pro Ultra X leads
Delta Pro Ultra X 6,144 Wh
Yeti Pro 4000 3,993.6 Wh
Delta Pro Ultra X: +2,150 Wh (+53.8%).
Delta Pro Ultra X vs Yeti Pro 4000
VS
12,000W
Running power
3,600W
6,144 Wh
Battery
3,993.6 Wh
187.4 lbs
Weight
115.7 lbs
At a Glance
This comparison targets buyers choosing between two expandable LFP power stations that sit at very different output levels. The Delta Pro Ultra X delivers 12,000W of running power and 24,000W surge, making it capable of powering virtually any home circuit, including heavy loads like HVAC systems and well pumps. The Yeti Pro 4000 tops out at 3,600W running and 7,200W surge, which still covers most portable and moderate household needs.
Battery capacity reflects a similar gap: 6,144 Wh for the EcoFlow unit versus roughly 3,994 Wh for the Goal Zero. In device compatibility testing across 53 appliances, the Delta Pro Ultra X handled all 53 while the Yeti Pro 4000 passed 47. Solar charging speed also favors the Delta Pro Ultra X, with a 10,000W max input that can refill the larger battery in about 7.3 hours.
The tradeoff is weight: the Delta Pro Ultra X tips the scale at 187.4 lbs, roughly 72 lbs heavier than the Yeti Pro 4000.
Overall Winner
Delta Pro Ultra X
Powers 53 of 53 tested devices vs 47 for Yeti Pro 4000
Home backup: Delta Pro Ultra X RV / mobile: Yeti Pro 4000 Solar: Delta Pro Ultra X
Delta Pro Ultra X wins overall, but the best pick depends on your use case.
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
Choose Yeti Pro 4000 if...
- + Portability matters (116 lbs vs 187)
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 X 12,000 W
Yeti Pro 4000 3,600 W
Delta Pro Ultra X: +8,400 W (+233.3%).
Surge Power
Higher is better | Scale max: 24,000 W | Delta Pro Ultra X leads
Delta Pro Ultra X 24,000 W
Yeti Pro 4000 7,200 W
Delta Pro Ultra X: +16,800 W (+233.3%).
Weight
Lower is better | Scale best: 115.7 lbs | Yeti Pro 4000 leads
Delta Pro Ultra X 187.4 lbs (85.0 kg)
Yeti Pro 4000 115.7 lbs (52.5 kg)
Yeti Pro 4000: -71.7 lbs (38.2% lighter).
Battery Life
Higher is better | Scale max: 4,000 cycles | Yeti Pro 4000 leads
Delta Pro Ultra X 3,200 cycles
Yeti Pro 4000 4,000 cycles
Yeti Pro 4000: +800 cycles (+25.0%).
Where Compatibility Actually Differs
Out of 53 devices tested, 6 show a different result between these two stations.
Both can run: 47 · Differences: 11% (6/53)
Only Delta Pro Ultra X can run 6
Electric Water Heater (50 Gal) Yeti Pro 4000: Voltage mismatch
Well Pump (1 HP) Yeti Pro 4000: Voltage mismatch
Central AC (3-Ton) Yeti Pro 4000: Voltage mismatch
Electric Clothes Dryer Yeti Pro 4000: Voltage mismatch
RV Rooftop AC (13,500 BTU) Yeti Pro 4000: Needs soft-start
Pancake Air Compressor (6-Gallon) Yeti Pro 4000: Needs soft-start
Full Specs Comparison
| Spec | Delta Pro Ultra X | Yeti Pro 4000 |
|---|---|---|
| Capacity | 6,144 Wh ✓ | 3,993.6 Wh |
| Running Power | 12,000 W ✓ | 3,600 W |
| Surge Power | 24,000 W ✓ | 7,200 W |
| Weight | 187.4 lbs (85.0 kg) | 115.7 lbs (52.5 kg) ✓ |
| Energy Density | 72.3 Wh/kg | 76.1 Wh/kg ✓ |
| Portability Tier | stationary | stationary |
| Chemistry | LFP | LFP |
| Cycle Life | 3,200 | 4,000 ✓ |
| Expandable | Yes | Yes |
| UPS | No | No |
| AC Voltage | 120V/240V | 120V |
Solar Charging
Best-case charging profile using compatible solar panels.
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
Yeti Pro 4000
Max solar input 3,000 W
Connector Proprietary + DC7909
Full charge time ~14.3h
Compatible panels 20/20
MPPT: 13.3-145V
Charge speed comparison
Longer bar = faster charge (inverted scale)
Device Compatibility
All tested devices grouped by category. Click a category to expand.
Delta Pro Ultra XYeti Pro 4000
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)
7/76/7
7/7
6/7
| Device | Delta Pro Ultra X | Runtime | Yeti Pro 4000 | Runtime |
|---|---|---|---|---|
| Box Fan (20-inch) | Safe | 51.8h | Safe | 33.7h |
| Central AC (3-Ton) | Tight | 1.1h | Voltage Fail | N/A |
| Dehumidifier (70 Pint) | Safe | 5h | Safe | 3.3h |
| Gas Furnace Fan (Blower) | Safe | 4.1h | Safe | 2.6h |
| Portable AC (12,000 BTU) | Safe | 3.2h | Safe | 2.1h |
| Space Heater (1,500W) | Safe | 2.9h | Safe | 1.9h |
| Window AC (8,000 BTU) | Safe | 6.1h | Safe | 3.9h |
Home Infrastructure(3)
3/31/3
3/3
1/3
| Device | Delta Pro Ultra X | Runtime | Yeti Pro 4000 | Runtime |
|---|---|---|---|---|
| Electric Water Heater (50 Gal) | Safe | 0.8h | Voltage Fail | N/A |
| Garage Door Opener (Residential) | Safe | 23.9h | Safe | 15.5h |
| Well Pump (1 HP) | Safe | 1.8h | Voltage Fail | N/A |
Kitchen Appliances(11)
11/1111/11
11/11
11/11
| Device | Delta Pro Ultra X | Runtime | Yeti Pro 4000 | Runtime |
|---|---|---|---|---|
| 2-Slice Bread Toaster | Safe | 2.9h | Safe | 1.9h |
| Coffee Maker | Safe | 2.7h | Safe | 1.7h |
| Digital Air Fryer | Safe | 2.5h | Safe | 1.6h |
| Electric Skillet | Safe | 2.9h | Safe | 1.9h |
| Electric Stove (Single Burner) | Safe | 2.4h | Safe | 1.6h |
| Electric Water Kettle | Safe | 2.9h | Safe | 1.9h |
| Instant Pot (6 Qt) | Safe | 2.9h | Safe | 1.9h |
| Microwave Oven (1000W) | Safe | 2.2h | Safe | 1.5h |
| Rice Cooker | Safe | 4.6h | Safe | 3h |
| Slow Cooker | Safe | 14.3h | Safe | 9.3h |
| Toaster Oven | Safe | 2.4h | Safe | 1.6h |
Large Appliances(4)
4/43/4
4/4
3/4
Medical(4)
4/44/4
4/4
4/4
Outdoor & RV(6)
6/65/6
6/6
5/6
Personal Care(2)
2/22/2
2/2
2/2
Power Tools(5)
5/54/5
5/5
4/5
As an Amazon Associate, we earn from qualifying purchases. Our methodology
The Bottom Line
Buyers who need whole-home backup power or plan to run high-draw appliances should choose the Delta Pro Ultra X for its 12,000W output and full 53-device compatibility. The Yeti Pro 4000 makes more sense for users who prioritize portability and longer cycle life at 4,000 cycles versus 3,200, and whose loads stay under 3,600W. Overall, the Delta Pro Ultra X earns the win with superior output, capacity, and broader device coverage.
Delta Pro Ultra X vs Yeti Pro 4000 FAQ
Q Which is better for home backup, Delta Pro Ultra X or Yeti Pro 4000?
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 X or Yeti Pro 4000?
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 Pro Ultra X or Yeti Pro 4000?
Yeti Pro 4000 is lighter at 115.7 lbs vs 187.4 lbs. Yeti Pro 4000 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 47 for Yeti Pro 4000.