Wattstanding
EcoFlow DELTA Pro Ultra Whole-Home Backup Power

Product image: EcoFlow

Home battery system · EcoFlow

EcoFlow DELTA Pro Ultra Whole-Home Backup Power

EcoFlow · 6,144 Wh · 7,200 W AC output

The short answer

The EcoFlow DELTA Pro Ultra Whole-Home Backup Power stores 6,144 Wh and the maker lists 7,200 W of continuous AC output with 10,800 W of surge. By our calculation a full charge runs a typical refrigerator for roughly 3.6 days, and the unit can power 20 of the 20 appliances we model. EcoFlow lists it at $4,199, about $683 per kWh of storage.

Capacity
6,144 Wh
AC output
7,200 W
Surge
10,800 W
Chemistry
LiFePO4
Weight
70 lb
Price seen
$4,199

Good fit if

  • You want a large battery for essential circuits, ideally installed with a transfer switch or home panel by an electrician
  • You want multi-day backup with solar recharge
  • You want a chemistry with long stated cycle life for standby use

Look elsewhere if

  • You need something portable — large systems are heavy
  • You will not hire an electrician for any home connection
$4,199EcoFlow 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

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 Whole-Home Backup Power stores 6,144 Wh, of which about 5,222 Wh reaches your appliances after losses, and its inverter limits the load to 7,200 W at a time.

Appliances this unit can run, with estimated runtime on a full charge
Appliance (typical)Running / starting wattsCan it run it?Runtime on a full charge
Refrigerator (modern, about 18–22 cu ft)150 W / 600 W startYes3.6 days18%
Chest freezer (about 7 cu ft)100 W / 400 W startYes6.2 days31%
Sump pump (1/3 hp)800 W / 1,500 W startYes43.5 h9%
Well pump (1/2 hp)1,000 W / 2,100 W startYes26.1 h6%
Gas furnace blower750 W / 1,500 W startYes13.9 h3%
Window air conditioner (5,000–8,000 BTU)600 W / 1,800 W startYes14.5 h3%
CPAP with heated humidifier70 WYes3.1 days16%
Home oxygen concentrator300 WYes17.4 h4%
Wi-Fi router and modem25 WYes8.7 days44%
LED television (55 in)100 WYes2.2 days11%
LED lighting (10 bulbs)100 WYes2.2 days11%
Laptop and charger60 WYes3.6 days18%
Phones and tablets charging (4)40 WYes5.4 days28%
Ceiling or box fan75 W / 150 W startYes2.9 days15%
Microwave oven (1,000 W cooking)1,500 WYes34.8 h7%
Coffee maker900 WYes2.4 days12%
Garage door opener (1/2 hp)550 W / 1,100 W startYes19.8 days100%
Washing machine500 W / 1,300 W startYes26.1 h6%
Electric space heater (1,500 W)1,500 WYes3.5 h2%
Central air conditioner (3-ton)3,500 W / 10,500 W startYes2.5 h2%
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
ScenarioRunning wattsStarting watts neededAverage drawFitsEstimated runtime
Essentials: refrigerator, router, lights, phones315 W765 W225 WFits23.2 h
Essentials + sump pump1,115 W1,815 W345 WFits15.1 h
Essentials + furnace blower + TV1,165 W1,915 W700 WFits7.5 h
Essentials + window air conditioner915 W2,115 W585 WFits8.9 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 totalBasisFlorida and the Gulf CoastTexasCalifornia
100 W—15.8 sunny days16.4 sunny days14.9 sunny days
200 W—7.9 sunny days8.2 sunny days7.4 sunny days
400 W—3.9 sunny days4.1 sunny days3.7 sunny days
  • solar input up to 5,600 W (as stated)

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 7,200 W.
  • ?Starting surgeMotor and compressor loads can start at several times their running watts; the maker states 10,800 W of surge.
  • ?Outlets and voltageDischarging: Pure sine, 7200W total, 120V/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.
  • iExpansion30kWh (5 x DPU Battery)
  • iWeight70 lb as stated — plan how you will move it.

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 capacity6,144 Wh[S1]Manufacturer store
Continuous AC output7,200 W[S1]Manufacturer store
Surge output (as stated)10,800 W[S1]Manufacturer store
120/240 V outputListed[S1]Manufacturer store
Battery chemistryLiFePO4[S1]Manufacturer store
Cycle life3,500 cycles[S1]Manufacturer store
AC outletsDischarging: Pure sine, 7200W total, 120V/240V~ 60Hz[S1]Manufacturer store
USB-C ports2 x 5/9/12/15/20V⎓5A, 100W Max per port, total 200W[S1]Manufacturer store
UPS / switchoverBackup UPS <20 ms; Online UPS 0 ms[S1]Manufacturer store
Solar input (as stated)5,600 W[S1]Manufacturer store
Expansion30kWh (5 x DPU Battery)[S1]Manufacturer store
Weight70 lb[S1]Manufacturer store
Dimensions690 x 481 x 214 mm (27.2 x 18.9 x 8.4 in.)[S1]Manufacturer store
App / connectivityBluetooth & Wi-Fi & 4G[S1]Manufacturer store
Warranty5-year warranty[S1]Manufacturer store

Wattstanding calculations

Usable energy (85% of capacity)5,222 WhWattstanding calculation
Refrigerator runtime (typical)3.6 daysWattstanding calculation
Price per kWh of storage$683Wattstanding 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.

Alternatives worth comparing

PECRON F5000LFP Solar Generator 7200W 5120Wh 120V/240V Home Backup5,120 Wh, 7,200 W; $1,002 less
Dabbsson TURBO 12000 Portable & Home Backup Power Station10,648 Wh, 12,000 W; $2,800 more
Dabbsson DBS2300 Portable & Home Backup Power Station2,330 Wh, 2,200 W; $3,300 less
Dabbsson DBS2300 Plus Portable & Home Backup Power Station2,330 Wh, 2,200 W; $3,300 less

Where to buy

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

$4,199EcoFlow 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 Whole-Home Backup Power run a refrigerator?
About 3.6 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 Whole-Home Backup Power 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 6,144 Wh it holds about 20% 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 Whole-Home Backup Power?
1 seller list it: EcoFlow.

Sources and verification

  1. EcoFlow — EcoFlow DELTA Pro Ultra Whole-Home Backup Power — 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