Capacity
Higher is better | Scale max: 3,994 Wh | Yeti Pro 4000 leads
DELTA 2 1,024 Wh
Yeti Pro 4000 3,993.6 Wh
Yeti Pro 4000: +2,970 Wh (+290.0%).
DELTA 2 vs Yeti Pro 4000
VS
1,800W
Running power
3,600W
1,024 Wh
Battery
3,993.6 Wh
26.5 lbs
Weight
115.7 lbs
At a Glance
This comparison targets buyers weighing a midsize portable unit against a high-capacity home backup system. The DELTA 2 delivers 1800W of running power from a 1024 Wh LFP battery, while the Yeti Pro 4000 pushes 3600W with nearly four times the capacity at 3993.6 Wh. That gap shows up in device coverage: the Yeti Pro 4000 powered 47 of 53 tested devices compared to 39 for the DELTA 2, earning a compatibility score of 95 versus 73.5.
Solar input tells a similar story. The Yeti Pro 4000 accepts up to 3000W of solar, six times the DELTA 2's 500W max. On the other hand, portability is not close.
At 26.5 lbs, the DELTA 2 is easy to move between rooms, load into a vehicle, or carry to a campsite. The Yeti Pro 4000 weighs 115.7 lbs, making it essentially a stationary unit once placed.
Overall Winner
Yeti Pro 4000
Powers 47 of 53 tested devices vs 39 for DELTA 2
Home backup: Yeti Pro 4000 RV / mobile: DELTA 2 Solar: Tie
Yeti Pro 4000 wins overall, but the best pick depends on your use case.
Choose DELTA 2 if...
- + Portability matters (27 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 1,800 W
Yeti Pro 4000 3,600 W
Yeti Pro 4000: +1,800 W (+100.0%).
Surge Power
Higher is better | Scale max: 7,200 W | Yeti Pro 4000 leads
DELTA 2 2,700 W
Yeti Pro 4000 7,200 W
Yeti Pro 4000: +4,500 W (+166.7%).
Weight
Lower is better | Scale best: 26.5 lbs | DELTA 2 leads
DELTA 2 26.5 lbs (12.0 kg)
Yeti Pro 4000 115.7 lbs (52.5 kg)
DELTA 2: -89.3 lbs (77.1% lighter).
Battery Life
Higher is better | Scale max: 4,000 cycles | Yeti Pro 4000 leads
DELTA 2 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, 8 show a different result between these two stations.
Both can run: 39 · Differences: 15% (8/53) · Neither can run: 6
Only Yeti Pro 4000 can run 8
Circular Saw (Corded) DELTA 2: Surge shortfall
Corded Drill / Hammer Drill DELTA 2: Surge shortfall
Electric Chainsaw (14-inch) 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
Sump Pump (1/2 HP) DELTA 2: Needs soft-start
Microwave Oven (1000W) DELTA 2: Running shortfall
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 | Yeti Pro 4000 |
|---|---|---|
| Capacity | 1,024 Wh | 3,993.6 Wh ✓ |
| Running Power | 1,800 W | 3,600 W ✓ |
| Surge Power | 2,700 W | 7,200 W ✓ |
| Weight | 26.5 lbs (12.0 kg) ✓ | 115.7 lbs (52.5 kg) |
| Energy Density | 85.3 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
Faster Max solar input 500 W
Connector XT60i
Full charge time ~3.7h
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 2Yeti Pro 4000
Emergency(2)
1/22/2
1/2
2/2
| Device | DELTA 2 | Runtime | Yeti Pro 4000 | Runtime |
|---|---|---|---|---|
| Full-Size Freezer (15-17 Cu. Ft.) | Safe | 4.5h | Safe | 17.5h |
| Sump Pump (1/2 HP) | Soft Start | 0.6h | Safe | 2.5h |
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 | Yeti Pro 4000 | Runtime |
|---|---|---|---|---|
| Box Fan (20-inch) | Safe | 8.6h | Safe | 33.7h |
| Central AC (3-Ton) | Voltage Fail | N/A | Voltage Fail | N/A |
| Dehumidifier (70 Pint) | Soft Start | 0.8h | Safe | 3.3h |
| Gas Furnace Fan (Blower) | Tight | 0.7h | Safe | 2.6h |
| Portable AC (12,000 BTU) | Soft Start | 0.5h | Safe | 2.1h |
| Space Heater (1,500W) | Safe | 0.5h | Safe | 1.9h |
| Window AC (8,000 BTU) | Safe | 1h | Safe | 3.9h |
Home Infrastructure(3)
1/31/3
1/3
1/3
| Device | DELTA 2 | Runtime | Yeti Pro 4000 | Runtime |
|---|---|---|---|---|
| Electric Water Heater (50 Gal) | Voltage Fail | N/A | Voltage Fail | N/A |
| Garage Door Opener (Residential) | Safe | 4h | Safe | 15.5h |
| Well Pump (1 HP) | Voltage Fail | N/A | Voltage Fail | N/A |
Kitchen Appliances(11)
10/1111/11
10/11
11/11
| Device | DELTA 2 | Runtime | Yeti Pro 4000 | Runtime |
|---|---|---|---|---|
| 2-Slice Bread Toaster | Safe | 0.5h | Safe | 1.9h |
| Coffee Maker | Safe | 0.4h | Safe | 1.7h |
| Digital Air Fryer | Tight | 0.4h | Safe | 1.6h |
| Electric Skillet | Safe | 0.5h | Safe | 1.9h |
| Electric Stove (Single Burner) | Tight | 0.4h | Safe | 1.6h |
| Electric Water Kettle | Safe | 0.5h | Safe | 1.9h |
| Instant Pot (6 Qt) | Safe | 0.5h | Safe | 1.9h |
| Microwave Oven (1000W) | Fail | N/A | Safe | 1.5h |
| Rice Cooker | Safe | 0.8h | Safe | 3h |
| Slow Cooker | Safe | 2.4h | Safe | 9.3h |
| Toaster Oven | Tight | 0.4h | Safe | 1.6h |
Large Appliances(4)
3/43/4
3/4
3/4
| Device | DELTA 2 | Runtime | Yeti Pro 4000 | Runtime |
|---|---|---|---|---|
| Dishwasher | Tight | 0.4h | Safe | 1.6h |
| Electric Clothes Dryer | Voltage Fail | N/A | Voltage Fail | N/A |
| French Door Refrigerator | Safe | 3.5h | Safe | 13.5h |
| Washing Machine | Safe | 0.6h | 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)
0/54/5
0/5
4/5
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The Bottom Line
Pick the DELTA 2 if you need a grab-and-go station for camping, tailgating, or light home use where 1800W and 1024 Wh cover your essentials. Choose the Yeti Pro 4000 when whole-circuit home backup, heavy appliances, or large solar arrays are priorities you cannot compromise on. The Yeti Pro 4000 wins this matchup on raw capability, device coverage, and expandability potential, making it the stronger choice for serious backup power.
DELTA 2 vs Yeti Pro 4000 FAQ
Q Which is better for home backup, DELTA 2 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 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 has the faster best-case solar recharge profile in our panel compatibility test set.
Q Which is more portable, DELTA 2 or Yeti Pro 4000?
DELTA 2 is lighter at 26.5 lbs vs 115.7 lbs. DELTA 2 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 39 for DELTA 2.