Capacity
Higher is better | Scale max: 3,994 Wh | Yeti Pro 4000 leads
DELTA 2 Max 2,048 Wh
Yeti Pro 4000 3,993.6 Wh
Yeti Pro 4000: +1,946 Wh (+95.0%).
DELTA 2 Max vs Yeti Pro 4000
VS
2,400W
Running power
3,600W
2,048 Wh
Battery
3,993.6 Wh
50.7 lbs
Weight
115.7 lbs
At a Glance
This comparison targets buyers weighing serious home backup capacity against a more portable setup. The Yeti Pro 4000 nearly doubles the DELTA 2 Max in battery capacity (3,993.6 Wh vs. 2,048 Wh) and delivers 3,600W of running power to the DELTA 2 Max's 2,400W, letting it handle higher-draw appliances and longer outages.
It also accepts up to 3,000W of solar input, triple what the DELTA 2 Max supports, and powered 47 of 53 tested devices compared to 45 for the EcoFlow unit. Cycle life favors the Yeti Pro 4000 as well, rated at 4,000 cycles versus 3,000.
The tradeoff is weight: at 115.7 lbs, the Goal Zero unit is more than twice as heavy as the 50.7 lb DELTA 2 Max, making the EcoFlow far easier to move between rooms, load into a vehicle, or carry to a campsite.
Overall Winner
Yeti Pro 4000
Powers 47 of 53 tested devices vs 45 for DELTA 2 Max
Home backup: Yeti Pro 4000 RV / mobile: DELTA 2 Max Solar: Tie
Yeti Pro 4000 wins overall, but the best pick depends on your use case.
Choose DELTA 2 Max if...
- + Portability matters (51 lbs vs 116)
- + You want faster solar recharging
Choose Yeti Pro 4000 if...
- + 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: 3,600 W | Yeti Pro 4000 leads
DELTA 2 Max 2,400 W
Yeti Pro 4000 3,600 W
Yeti Pro 4000: +1,200 W (+50.0%).
Surge Power
Higher is better | Scale max: 7,200 W | Yeti Pro 4000 leads
DELTA 2 Max 4,800 W
Yeti Pro 4000 7,200 W
Yeti Pro 4000: +2,400 W (+50.0%).
Weight
Lower is better | Scale best: 50.7 lbs | DELTA 2 Max leads
DELTA 2 Max 50.7 lbs (23.0 kg)
Yeti Pro 4000 115.7 lbs (52.5 kg)
DELTA 2 Max: -65.0 lbs (56.2% lighter).
Battery Life
Higher is better | Scale max: 4,000 cycles | Yeti Pro 4000 leads
DELTA 2 Max 3,000 cycles
Yeti Pro 4000 4,000 cycles
Yeti Pro 4000: +1,000 cycles (+33.3%).
Where Compatibility Actually Differs
Out of 53 devices tested, 2 show a different result between these two stations.
Both can run: 45 · Differences: 4% (2/53) · Neither can run: 6
Neither can run · 6 devices
These are 240V or high-voltage devices — neither station supports them.
Pancake Air Compressor (6-Gallon)
Central AC (3-Ton)
Electric Water Heater (50 Gal)
Well Pump (1 HP)
Electric Clothes Dryer
RV Rooftop AC (13,500 BTU)
Full Specs Comparison
| Spec | DELTA 2 Max | Yeti Pro 4000 |
|---|---|---|
| Capacity | 2,048 Wh | 3,993.6 Wh ✓ |
| Running Power | 2,400 W | 3,600 W ✓ |
| Surge Power | 4,800 W | 7,200 W ✓ |
| Weight | 50.7 lbs (23.0 kg) ✓ | 115.7 lbs (52.5 kg) |
| Energy Density | 89.0 Wh/kg ✓ | 76.1 Wh/kg |
| Portability Tier | portable | stationary |
| Chemistry | LFP | LFP |
| Cycle Life | 3,000 | 4,000 ✓ |
| Expandable | Yes | Yes |
| UPS | No | No |
| AC Voltage | 120V | 120V |
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
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 2 MaxYeti 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)
6/76/7
6/7
6/7
| Device | DELTA 2 Max | Runtime | Yeti Pro 4000 | Runtime |
|---|---|---|---|---|
| Box Fan (20-inch) | Safe | 17.3h | Safe | 33.7h |
| Central AC (3-Ton) | Voltage Fail | N/A | Voltage Fail | N/A |
| Dehumidifier (70 Pint) | Safe | 1.7h | Safe | 3.3h |
| Gas Furnace Fan (Blower) | Safe | 1.4h | Safe | 2.6h |
| Portable AC (12,000 BTU) | Tight | 1.1h | Safe | 2.1h |
| Space Heater (1,500W) | Safe | 1h | Safe | 1.9h |
| Window AC (8,000 BTU) | Safe | 2h | Safe | 3.9h |
Home Infrastructure(3)
1/31/3
1/3
1/3
| Device | DELTA 2 Max | Runtime | Yeti Pro 4000 | Runtime |
|---|---|---|---|---|
| Electric Water Heater (50 Gal) | Voltage Fail | N/A | Voltage Fail | N/A |
| Garage Door Opener (Residential) | Safe | 8h | Safe | 15.5h |
| Well Pump (1 HP) | Voltage Fail | N/A | Voltage Fail | N/A |
Kitchen Appliances(11)
11/1111/11
11/11
11/11
| Device | DELTA 2 Max | Runtime | Yeti Pro 4000 | Runtime |
|---|---|---|---|---|
| 2-Slice Bread Toaster | Safe | 1h | Safe | 1.9h |
| Coffee Maker | Safe | 0.9h | Safe | 1.7h |
| Digital Air Fryer | Safe | 0.8h | Safe | 1.6h |
| Electric Skillet | Safe | 1h | Safe | 1.9h |
| Electric Stove (Single Burner) | Safe | 0.8h | Safe | 1.6h |
| Electric Water Kettle | Safe | 1h | Safe | 1.9h |
| Instant Pot (6 Qt) | Safe | 1h | Safe | 1.9h |
| Microwave Oven (1000W) | Safe | 0.7h | Safe | 1.5h |
| Rice Cooker | Safe | 1.5h | Safe | 3h |
| Slow Cooker | Safe | 4.8h | Safe | 9.3h |
| Toaster Oven | Safe | 0.8h | Safe | 1.6h |
Large Appliances(4)
3/43/4
3/4
3/4
| Device | DELTA 2 Max | Runtime | Yeti Pro 4000 | Runtime |
|---|---|---|---|---|
| Dishwasher | Safe | 0.8h | Safe | 1.6h |
| Electric Clothes Dryer | Voltage Fail | N/A | Voltage Fail | N/A |
| French Door Refrigerator | Safe | 6.9h | Safe | 13.5h |
| Washing Machine | Safe | 1.1h | Safe | 2.2h |
Medical(4)
4/44/4
4/4
4/4
Outdoor & RV(6)
5/65/6
5/6
5/6
Personal Care(2)
2/22/2
2/2
2/2
Power Tools(5)
2/54/5
2/5
4/5
| Device | DELTA 2 Max | Runtime | Yeti Pro 4000 | Runtime |
|---|---|---|---|---|
| Circular Saw (Corded) | Fail | N/A | Safe | 1.6h |
| Corded Drill / Hammer Drill | Safe | 1.3h | Safe | 2.6h |
| Electric Chainsaw (14-inch) | Fail | N/A | Safe | 1.6h |
| Pancake Air Compressor (6-Gallon) | Soft Start | 0.9h | Soft Start | 1.7h |
| Shop Vac (Wet/Dry, 5-6 HP Peak) | Tight | 1h | Safe | 2h |
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The Bottom Line
Choose the DELTA 2 Max if portability matters most and your loads stay under 2,400W; its 50.7 lb frame and expandable battery make it a practical mobile or light home-backup solution. Go with the Yeti Pro 4000 if you need extended runtime, higher wattage headroom, and faster solar recharge for whole-home or worksite use. With a score of 95 versus 88.5 and broader device coverage, the Yeti Pro 4000 is the stronger overall pick.
DELTA 2 Max vs Yeti Pro 4000 FAQ
Q Which is better for home backup, DELTA 2 Max or Yeti Pro 4000?
Yeti Pro 4000 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 Yeti Pro 4000?
Yeti Pro 4000 has higher battery capacity (3,993.6 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 Yeti Pro 4000?
DELTA 2 Max is lighter at 50.7 lbs vs 115.7 lbs. DELTA 2 Max is rated portable for portability.
Q How many devices can each power station run?
Yeti Pro 4000 powers 47 of 53 tested devices, compared to 45 for DELTA 2 Max.