DELTA (Gen 1) vs Delta Pro Ultra X

EcoFlow

DELTA (Gen 1)

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EcoFlow

Delta Pro Ultra X

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1,800W

Running power

12,000W

1,260 Wh

Battery

6,144 Wh

30.9 lbs

Weight

187.4 lbs

At a Glance

This comparison targets buyers choosing between two EcoFlow units at opposite ends of the power spectrum. The DELTA (Gen 1) delivers 1800W of running power from a 1260 Wh NMC battery, weighing just 30.9 lbs. The Delta Pro Ultra X is a fundamentally different class of generator: 12000W running output, 6144 Wh of LFP capacity, and 24000W surge capability.

In our 53-device compatibility test, the Ultra X powered every single device while the DELTA handled 40. Solar input tells a similar story, with the Ultra X accepting up to 10000W versus 400W on the DELTA. Battery longevity also favors the Ultra X at 3200 cycles compared to 800.

The tradeoff is size and portability: the DELTA weighs 30.9 lbs, making it easy to move, while the Ultra X tips the scales at 187.4 lbs and is better suited to a fixed installation.

Overall Winner

Delta Pro Ultra X

Powers 53 of 53 tested devices vs 40 for DELTA (Gen 1)

Home backup: Delta Pro Ultra X RV / mobile: DELTA (Gen 1) Solar: Tie

Delta Pro Ultra X wins overall, but the best pick depends on your use case.

Choose DELTA (Gen 1) if...

+ Portability matters (31 lbs vs 187)
+ You want faster solar recharging

Choose Delta Pro Ultra X if...

+ You value battery longevity (LFP, 3,200 cycles)
+ You need 240V-capable loads
+ You want future battery expansion
+ 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.

Capacity

Higher is better | Scale max: 6,144 Wh | Delta Pro Ultra X leads

DELTA (Gen 1) 1,260 Wh

Delta Pro Ultra X 6,144 Wh

Delta Pro Ultra X: +4,884 Wh (+387.6%).

Running Power

Higher is better | Scale max: 12,000 W | Delta Pro Ultra X leads

DELTA (Gen 1) 1,800 W

Delta Pro Ultra X 12,000 W

Delta Pro Ultra X: +10,200 W (+566.7%).

Surge Power

Higher is better | Scale max: 24,000 W | Delta Pro Ultra X leads

DELTA (Gen 1) 3,300 W

Delta Pro Ultra X 24,000 W

Delta Pro Ultra X: +20,700 W (+627.3%).

Weight

Lower is better | Scale best: 30.9 lbs | DELTA (Gen 1) leads

DELTA (Gen 1) 30.9 lbs (14.0 kg)

Delta Pro Ultra X 187.4 lbs (85.0 kg)

DELTA (Gen 1): -156.5 lbs (83.5% lighter).

Battery Life

Higher is better | Scale max: 3,200 cycles | Delta Pro Ultra X leads

DELTA (Gen 1) 800 cycles

Delta Pro Ultra X 3,200 cycles

Delta Pro Ultra X: +2,400 cycles (+300.0%).

Where Compatibility Actually Differs

Out of 53 devices tested, 13 show a different result between these two stations.

Same result: 75%

Both can run: 40 · Differences: 25% (13/53)

Only Delta Pro Ultra X can run 13

Circular Saw (Corded) DELTA (Gen 1): Surge shortfall

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Electric Chainsaw (14-inch) DELTA (Gen 1): Surge shortfall

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Pancake Air Compressor (6-Gallon) DELTA (Gen 1): Surge shortfall

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Shop Vac (Wet/Dry, 5-6 HP Peak) DELTA (Gen 1): Surge shortfall

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Central AC (3-Ton) DELTA (Gen 1): Voltage mismatch

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Dehumidifier (70 Pint) DELTA (Gen 1): Needs soft-start

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Portable AC (12,000 BTU) DELTA (Gen 1): Needs soft-start

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Electric Water Heater (50 Gal) DELTA (Gen 1): Voltage mismatch

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Well Pump (1 HP) DELTA (Gen 1): Voltage mismatch

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Sump Pump (1/2 HP) DELTA (Gen 1): Needs soft-start

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Microwave Oven (1000W) DELTA (Gen 1): Running shortfall

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Electric Clothes Dryer DELTA (Gen 1): Voltage mismatch

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RV Rooftop AC (13,500 BTU) DELTA (Gen 1): Surge shortfall

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Full Specs Comparison

Spec	DELTA (Gen 1)	Delta Pro Ultra X
Capacity	1,260 Wh	6,144 Wh ✓
Running Power	1,800 W	12,000 W ✓
Surge Power	3,300 W	24,000 W ✓
Weight	30.9 lbs (14.0 kg) ✓	187.4 lbs (85.0 kg)
Energy Density	90.0 Wh/kg ✓	72.3 Wh/kg
Portability Tier	portable	stationary
Chemistry	NMC	LFP
Cycle Life	800	3,200 ✓
Expandable	No	Yes
UPS	No	No
AC Voltage	120V	120V/240V

Solar Charging

Best-case charging profile using compatible solar panels.

DELTA (Gen 1)

Faster

Max solar input 400 W

Connector XT60

Full charge time ~4.5h

Compatible panels 19/20

MPPT: 10-65V

Delta Pro Ultra X

Max solar input 10,000 W

Connector MC4

Full charge time ~7.3h

Compatible panels 20/20

MPPT: 80-500V

Charge speed comparison

~4.5h

~7.3h

Longer bar = faster charge (inverted scale)

Device Compatibility

All tested devices grouped by category. Click a category to expand.

DELTA (Gen 1)Delta Pro Ultra X

Emergency(2)

1/2

2/2

Device	DELTA (Gen 1)	Runtime	Delta Pro Ultra X	Runtime
Full-Size Freezer (15-17 Cu. Ft.)	Safe	5.5h	Safe	26.9h
Sump Pump (1/2 HP)	Soft Start	0.8h	Safe	3.8h

Entertainment(2)

2/2

Device	DELTA (Gen 1)	Runtime	Delta Pro Ultra X	Runtime
Desktop PC (Gaming/Workstation)	Safe	0.9h	Safe	4.3h
Television	Safe	5.2h	Safe	25.3h

EV & Transportation(2)

2/2

Device	DELTA (Gen 1)	Runtime	Delta Pro Ultra X	Runtime
E-Bike Battery Charger	Safe	4.4h	Safe	21.5h
EV Charger (Level 1, 120V)	Safe	0.6h	Safe	3h

Heating & Cooling(7)

4/7

7/7

Device	DELTA (Gen 1)	Runtime	Delta Pro Ultra X	Runtime
Box Fan (20-inch)	Safe	10.6h	Safe	51.8h
Central AC (3-Ton)	Voltage Fail	N/A	Tight	1.1h
Dehumidifier (70 Pint)	Soft Start	1h	Safe	5h
Gas Furnace Fan (Blower)	Safe	0.8h	Safe	4.1h
Portable AC (12,000 BTU)	Soft Start	0.6h	Safe	3.2h
Space Heater (1,500W)	Safe	0.6h	Safe	2.9h
Window AC (8,000 BTU)	Safe	1.2h	Safe	6.1h

Home Infrastructure(3)

1/3

3/3

Device	DELTA (Gen 1)	Runtime	Delta Pro Ultra X	Runtime
Electric Water Heater (50 Gal)	Voltage Fail	N/A	Safe	0.8h
Garage Door Opener (Residential)	Safe	4.9h	Safe	23.9h
Well Pump (1 HP)	Voltage Fail	N/A	Safe	1.8h

Kitchen Appliances(11)

10/11

11/11

Device	DELTA (Gen 1)	Runtime	Delta Pro Ultra X	Runtime
2-Slice Bread Toaster	Safe	0.6h	Safe	2.9h
Coffee Maker	Safe	0.6h	Safe	2.7h
Digital Air Fryer	Tight	0.5h	Safe	2.5h
Electric Skillet	Safe	0.6h	Safe	2.9h
Electric Stove (Single Burner)	Tight	0.5h	Safe	2.4h
Electric Water Kettle	Safe	0.6h	Safe	2.9h
Instant Pot (6 Qt)	Safe	0.6h	Safe	2.9h
Microwave Oven (1000W)	Fail	N/A	Safe	2.2h
Rice Cooker	Safe	0.9h	Safe	4.6h
Slow Cooker	Safe	2.9h	Safe	14.3h
Toaster Oven	Tight	0.5h	Safe	2.4h

Large Appliances(4)

3/4

4/4

Device	DELTA (Gen 1)	Runtime	Delta Pro Ultra X	Runtime
Dishwasher	Tight	0.5h	Safe	2.4h
Electric Clothes Dryer	Voltage Fail	N/A	Safe	0.8h
French Door Refrigerator	Safe	4.3h	Safe	20.8h
Washing Machine	Safe	0.7h	Safe	3.3h

Medical(4)

4/4

Device	DELTA (Gen 1)	Runtime	Delta Pro Ultra X	Runtime
CPAP Machine	Safe	15.7h	Safe	76.7h
Electric Wheelchair Charger	Safe	2.6h	Safe	12.6h
Medical Nebulizer Machine	Safe	8h	Safe	39.1h
Portable Oxygen Concentrator	Safe	2.5h	Safe	12.3h

Outdoor & RV(6)

5/6

6/6

Device	DELTA (Gen 1)	Runtime	Delta Pro Ultra X	Runtime
Pellet Grill	Safe	9.2h	Safe	44.8h
Portable Electric Cooler	Safe	14.7h	Safe	71.7h
Portable Fan	Safe	14.5h	Safe	70.5h
Portable Ice Maker (Countertop)	Safe	2.5h	Safe	11.9h
Portable Projector	Safe	4.4h	Safe	21.5h
RV Rooftop AC (13,500 BTU)	Fail	N/A	Safe	2.4h

Personal Care(2)

2/2

Device	DELTA (Gen 1)	Runtime	Delta Pro Ultra X	Runtime
Electric Blanket	Safe	4.9h	Safe	23.9h
Professional Hair Dryer	Tight	0.5h	Safe	2.5h

Power Tools(5)

1/5

5/5

Device	DELTA (Gen 1)	Runtime	Delta Pro Ultra X	Runtime
Circular Saw (Corded)	Fail	N/A	Safe	2.4h
Corded Drill / Hammer Drill	Tight	0.8h	Safe	4h
Electric Chainsaw (14-inch)	Fail	N/A	Safe	2.5h
Pancake Air Compressor (6-Gallon)	Fail	N/A	Safe	2.7h
Shop Vac (Wet/Dry, 5-6 HP Peak)	Fail	N/A	Safe	3.1h

Work from Home(5)

5/5

Device	DELTA (Gen 1)	Runtime	Delta Pro Ultra X	Runtime
Laptop	Safe	2.5h	Safe	11.9h
Laser Printer	Safe	1.2h	Safe	6.1h
Monitor (27-inch LCD)	Safe	16h	Safe	78.2h
Starlink System	Safe	8.8h	Safe	43h
WiFi Router	Safe	11.8h	Safe	57.3h

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The Bottom Line

The DELTA (Gen 1) fits buyers who need a portable, lightweight station for camping, tailgating, or light outdoor work where 1800W and 1260 Wh are sufficient. The Delta Pro Ultra X suits homeowners seeking whole-house backup or heavy-duty off-grid setups, with expandable capacity and 12000W of continuous output. With a score of 105 versus 75.5 and full device coverage, the Delta Pro Ultra X is the clear winner for anyone whose priority is power and versatility over portability.

DELTA (Gen 1) vs Delta Pro Ultra X FAQ

Q Which is better for home backup, DELTA (Gen 1) or Delta Pro Ultra X?

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 (Gen 1) or Delta Pro Ultra X?

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 (Gen 1) has the faster best-case solar recharge profile in our panel compatibility test set.

Q Which is more portable, DELTA (Gen 1) or Delta Pro Ultra X?

DELTA (Gen 1) is lighter at 30.9 lbs vs 187.4 lbs. DELTA (Gen 1) is rated portable for portability.

Q How many devices can each power station run?

Delta Pro Ultra X powers 53 of 53 tested devices, compared to 40 for DELTA (Gen 1).

Q Can you expand the battery capacity of DELTA (Gen 1) or Delta Pro Ultra X?

Only Delta Pro Ultra X supports expansion batteries for additional capacity. DELTA (Gen 1) is limited to its built-in 1,260 Wh.