EcoFlow DELTA Pro Ultra X Solar Generator: Specs, Runtime & What It…

Q: How long will the EcoFlow DELTA Pro Ultra X Solar Generator run a refrigerator?

About 7.1 days on a full charge by our calculation (typical modern refrigerator, 40% duty cycle, 85% efficiency). Your refrigerator's nameplate and its door-opening habits change this.

Q: Can the EcoFlow DELTA Pro Ultra X Solar Generator run a sump pump or well pump?

Sump pump (1/3 hp): yes. Well pump (1/2 hp): yes. These use typical wattages; read the pump's nameplate.

Q: Can I use it to power my whole house?

Not by plugging the house into it. With 12,000 Wh it holds about 40% of one day's energy for a home that uses 30 kWh a day (an example figure — check your own bill), and connecting it to home wiring needs a licensed electrician.

What it can run, and for how long

A power station is a battery with an inverter: it stores energy as watt-hours (Wh) and delivers it as AC watts (W). The EcoFlow DELTA Pro Ultra X Solar Generator stores 12,000 Wh, of which about 10,200 Wh reaches your appliances after losses, and its inverter limits the load to 12,000 W at a time.

Appliances this unit can run, with estimated runtime on a full charge
Appliance (typical)	Running / starting watts	Can it run it?	Runtime on a full charge
Refrigerator (modern, about 18–22 cu ft)	150 W / 600 W start	Yes	7.1 days	18%
Chest freezer (about 7 cu ft)	100 W / 400 W start	Yes	12.1 days	31%
Sump pump (1/3 hp)	800 W / 1,500 W start	Yes	3.5 days	9%
Well pump (1/2 hp)	1,000 W / 2,100 W start	Yes	2.1 days	6%
Gas furnace blower	750 W / 1,500 W start	Yes	27.2 h	3%
Window air conditioner (5,000–8,000 BTU)	600 W / 1,800 W start	Yes	28.3 h	3%
CPAP with heated humidifier	70 W	Yes	6.1 days	16%
Home oxygen concentrator	300 W	Yes	34.0 h	4%
Wi-Fi router and modem	25 W	Yes	17.0 days	44%
LED television (55 in)	100 W	Yes	4.2 days	11%
LED lighting (10 bulbs)	100 W	Yes	4.2 days	11%
Laptop and charger	60 W	Yes	7.1 days	18%
Phones and tablets charging (4)	40 W	Yes	10.6 days	28%
Ceiling or box fan	75 W / 150 W start	Yes	5.7 days	15%
Microwave oven (1,000 W cooking)	1,500 W	Yes	2.8 days	7%
Coffee maker	900 W	Yes	4.7 days	12%
Garage door opener (1/2 hp)	550 W / 1,100 W start	Yes	38.6 days	100%
Washing machine	500 W / 1,300 W start	Yes	2.1 days	6%
Electric space heater (1,500 W)	1,500 W	Yes	6.8 h	2%
Central air conditioner (3-ton)	3,500 W / 10,500 W start	Yes	4.9 h	2%

Wattstanding calculationWattstanding calculation — runtime = capacity (Wh) × 85% ÷ (running watts × duty cycle). The 85% covers inverter and conversion losses; duty cycle is the share of time the appliance actually draws power. Appliance wattages are typical planning values, not measurements — read the nameplate on your own appliance. Real runtime also depends on temperature, battery age and the maker's inverter efficiency.

Outage scenarios
Scenario	Running watts	Starting watts needed	Average draw	Fits	Estimated runtime
Essentials: refrigerator, router, lights, phones	315 W	765 W	225 W	Fits	45.3 h
Essentials + sump pump	1,115 W	1,815 W	345 W	Fits	29.6 h
Essentials + furnace blower + TV	1,165 W	1,915 W	700 W	Fits	14.6 h
Essentials + window air conditioner	915 W	2,115 W	585 W	Fits	17.4 h

Practical noteCooling appliances cycle on and off, so a refrigerator draws far less than its running watts over a day, but each start needs a brief surge. If a load's starting watts exceed the maker's surge rating, the inverter can shut down.

Recharging

Recharge time depends on the source. Solar numbers below are our calculation for the panel wattage shown, assuming 75% real-world output and the approximate annual-average peak sun hours for each region; winter and cloud cover cut them sharply.

Days of sun to refill from empty
Panel total	Basis	Florida and the Gulf Coast	Texas	California
100 W	—	30.8 sunny days	32.0 sunny days	29.1 sunny days
200 W	—	15.4 sunny days	16.0 sunny days	14.5 sunny days
400 W	—	7.7 sunny days	8.0 sunny days	7.3 sunny days

solar input up to 1,800 W (as stated)
AC wall charging up to 12,000 W (as stated) — about 1.0 h from empty at that rate before losses

See the solar recharge calculator for your own panel size and sun hours.

Connecting it to a home

You can plug appliances straight into the unit's outlets. Powering a home's circuits is different: it needs a properly rated transfer switch or the maker's home-integration hardware, installed by a licensed electrician.

SafetyNever plug a generator or battery system into a wall outlet to power the house ("backfeeding"): it can send electricity back into the utility lines and injure line workers, and it can start fires. Connecting a generator to a home's wiring is a job for a licensed electrician, with the permit and inspection your local code requires. Wattstanding does not give wiring instructions.

If you plan to connect it to the house, compare it with the equipment in our transfer switch and hookup library and read the whole-house guide.

Fit check before you buy

Checks to make against your loads and your plan before ordering.

✓ Required? Check firsti Good to know

✓Loads fit the outputAdd up the running watts of everything you will run together; keep the total under 12,000 W.
?Starting surgeNo surge rating was stated in the sources we read; confirm with the maker before running motors.
?Outlets and voltage12KW, 120/240V, 60Hz The listing mentions 120/240 V output — confirm which model variant has it.
iRecharge planDecide how you will refill it: wall power, solar or a generator, within its stated input limits.

Specifications

Each figure is labelled with where it comes from. Numbered references link to the source list below.

Manufacturer storeRetailer listingWattstanding calculationNot verified

Published specifications

Battery capacity	12,000 Wh[S1]	Manufacturer store
Continuous AC output	12,000 W[S1]	Manufacturer store
120/240 V output	Listed[S1]	Manufacturer store
AC outlets	12KW, 120/240V, 60Hz[S1]	Manufacturer store
UPS / switchover	<20ms with Smart Home Panel 3[S1]	Manufacturer store
Solar input (as stated)	1,800 W[S1]	Manufacturer store
AC charging input	12,000 W[S1]	Manufacturer store
Dimensions	Inverter: 675 × 475 × 230 mm (26.6 × 18.7 × 9.06 in.)[S1]	Manufacturer store
Water/dust rating	IP68[S1]	Manufacturer store
Noise	30 dB[S1]	Manufacturer store
Warranty	5 years[S1]	Manufacturer store

Wattstanding calculations

Usable energy (85% of capacity)	10,200 Wh	Wattstanding calculation
Refrigerator runtime (typical)	7.1 days	Wattstanding calculation
Price per kWh of storage	$825	Wattstanding calculation

Limitations to weigh

Specifications are the maker's or seller's; Wattstanding has not tested this product.
Runtime figures are calculations with stated assumptions, not measurements.
Prices change; confirm the price, stock and what is included before ordering.
No surge rating was found in the sources we read.

Alternatives worth comparing

Dabbsson TURBO 12000 Portable & Home Backup Power Station10,648 Wh, 12,000 W; $2,900 less

EcoFlow DELTA Pro Ultra Whole-Home Backup Power6,144 Wh, 7,200 W; $5,700 less

PECRON F5000LFP Solar Generator 7200W 5120Wh 120V/240V Home Backup5,120 Wh, 7,200 W; $6,702 less

Dabbsson DBS2300 Portable & Home Backup Power Station2,330 Wh, 2,200 W; $9,000 less

Where to buy

Our link opens this exact product page. Prices and stock change; check before you order.

$9,899EcoFlow listed price (base model) · seen 30 Sep 2026

View at EcoFlow

Every link opens the product page for this exact model. We may earn a commission; it never changes what we publish. Disclosure

Questions buyers ask

How long will the EcoFlow DELTA Pro Ultra X Solar Generator run a refrigerator?

About 7.1 days on a full charge by our calculation (typical modern refrigerator, 40% duty cycle, 85% efficiency). Your refrigerator's nameplate and its door-opening habits change this.

Can the EcoFlow DELTA Pro Ultra X Solar Generator run a sump pump or well pump?

Sump pump (1/3 hp): yes. Well pump (1/2 hp): yes. These use typical wattages; read the pump's nameplate.

Can I use it to power my whole house?

Not by plugging the house into it. With 12,000 Wh it holds about 40% of one day's energy for a home that uses 30 kWh a day (an example figure — check your own bill), and connecting it to home wiring needs a licensed electrician.

Where can I buy the EcoFlow DELTA Pro Ultra X Solar Generator?

1 seller list it: EcoFlow.

Sources and verification

EcoFlow — EcoFlow DELTA Pro Ultra X Solar Generator — product page and specifications Retrieved 30 Sep 2026

Wattstanding has not tested this product hands-on. This reference is compiled from the sources above; our calculations are labelled and show their working. Electrical work belongs to a licensed electrician. Last verified 30 Sep 2026. How we work

EcoFlow DELTA Pro Ultra X Solar Generator

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