How many power stations does EcoFlow sell in the US?

18 as of October 12, 2026: 17 on EcoFlow's US store (five RIVER, eight DELTA and four DELTA Pro models; the RIVER 2 Pro showed as sold out that day) plus the RIVER 3, which is sold through Amazon. They range from the 243Wh RIVER 2 at $209 to the 12,288Wh DELTA Pro Ultra X at $7,999.

Which EcoFlow power station is best for home backup?

The DELTA 3 Max Plus ($1,149) for a fridge and essentials: 2,048Wh, 3,000W and expandable to 10kWh. For whole-home backup with 240V circuits, the DELTA Pro 3 ($2,799): 4,096Wh, 4,000W at 120V and 240V, expandable to 12kWh per unit.

What is the difference between EcoFlow RIVER and DELTA?

RIVER models are small (243Wh to 768Wh, 300W to 800W, 7.7 to 18.2 lb) for camping, CPAP and electronics. DELTA models hold 1,024Wh to 3,072Wh, put out 1,800W to 3,600W and run fridges, pumps and kitchen appliances. DELTA Pro models add whole-home capacity and, on most of them, 240V.

Which EcoFlow power stations have 240V output?

The DELTA Pro 3, DELTA Pro Ultra and DELTA Pro Ultra X. The original DELTA Pro is 120V on its own and reaches 240V only when two units are linked through EcoFlow's Double Voltage Hub. No RIVER or DELTA 3 model has 240V.

Which EcoFlow power station is the cheapest per watt-hour?

The DELTA 3 Max at about $0.43 per Wh ($879 for 2,048Wh), followed by the DELTA 3 Ultra ($0.44) and the RIVER 2 Pro ($0.48, though it was sold out at EcoFlow), based on EcoFlow's US prices on October 12, 2026.

How long will an EcoFlow power station run a refrigerator?

Using rated Wh x 0.85 / 150W for a full-size fridge: about 5.8 hours on a 1,024Wh DELTA 3, 11.6 hours on a 2,048Wh DELTA 3 Max, 17.4 hours on a 3,072Wh DELTA 3 Ultra and 23.2 hours on a 4,096Wh DELTA Pro 3.

Is the EcoFlow DELTA 2 discontinued?

Yes. EcoFlow's US store now forwards the DELTA 2 page to the DELTA 3, which has the same 1,024Wh capacity and accepts DELTA 2 extra batteries. The DELTA 2 Max is still sold.

Which EcoFlow power stations work with the Smart Generator?

The Smart Generator 4000 auto-starts with the DELTA Pro 3, DELTA Pro, DELTA 2 Max, DELTA 3, DELTA 3 Plus, DELTA 3 Max Plus and DELTA 3 Ultra Plus; the Smart Generator 3000 with the DELTA 3, DELTA 3 Plus and DELTA 3 Ultra Plus. Neither works that way with the DELTA Pro Ultra or RIVER models.

Every EcoFlow Power Station Compared (2026): 18 Models

As of October 12, 2026, EcoFlow sells 18 power stations to US buyers, from the 243Wh RIVER 2 at $209 to the 12,288Wh DELTA Pro Ultra X at $7,999: 17 on its own US store and the RIVER 3 through Amazon. For most households the short answer is the DELTA 3 Classic ($499, 1,024Wh) for apartment backup, the DELTA 3 Max Plus ($1,149, 2,048Wh, about 11.6 hours on a full-size fridge and expandable to 10kWh) for riding out an outage, and the DELTA Pro 3 ($2,799, 4,096Wh, 120V and 240V) for whole-home backup.

Every spec and price below comes from the model's page on EcoFlow's US store (us.ecoflow.com); specs were checked September 30, 2026 and prices October 12, 2026. The RIVER 3, which that store does not sell, comes from its Amazon US listing. Where EcoFlow does not publish a figure, the cell says "Not published" rather than guessing. This comparison is based on published specifications and pricing, and EcoFlow's prices move often, so treat them as approximate.

Every EcoFlow power station compared

Model	Price (EcoFlow US)	Capacity	AC output / surge	Solar input	Weight	Expandable to	UPS switchover
RIVER 2 (240)	$209	243Wh	300W / 600W	110W	7.7 lb	No	Under 30ms
RIVER 3	About $249 (Amazon)	245Wh	300W / not published (600W X-Boost)	110W (see note)	7.8 lb	No	Under 20ms
RIVER 3 Plus	$279 (list $299)	286Wh	600W / 1,200W	220W	10.4 lb	858Wh	Under 10ms
RIVER 2 Max (500)	$309	499Wh	500W / 1,000W	220W	13.2 lb	No	Not published
RIVER 3 Max	$319	572Wh	600W / 1,200W	220W	18.1 lb (two pieces)	No (see note)	Under 10ms
RIVER 2 Pro	$369 (sold out at EcoFlow; about $389 on Amazon)	768Wh	800W / 1,600W	220W	18.2 lb	No	Under 30ms
DELTA 3 Classic	$499	1,024Wh	1,800W / 3,600W	500W	26.7 lb	No	10ms
DELTA 3	$599	1,024Wh	1,800W / 3,600W	500W	27.6 lb	About 5kWh	Under 10ms
DELTA 3 Plus	$719	1,024Wh	1,800W / 3,600W	1,000W	27.6 lb	About 5kWh	Under 10ms
DELTA 3 Max	$879	2,048Wh	2,400W / 4,800W	500W	44.8 lb	No	Under 10ms
DELTA 2 Max	$1,029	2,048Wh	2,400W / 4,800W	1,000W	50 lb	6kWh	Not published
DELTA 3 Max Plus	$1,149	2,048Wh	3,000W / 6,000W	1,000W	48.7 lb	10kWh	Under 10ms
DELTA 3 Ultra	$1,349	3,072Wh	3,600W / 7,200W	800W	72.1 lb	No	Under 10ms
DELTA 3 Ultra Plus	$1,599	3,072Wh	3,600W / 7,200W	1,600W	74.3 lb	11kWh	Under 10ms
DELTA Pro	$1,899	3,600Wh	3,600W / 7,200W (120V)	1,600W	99 lb	10.8kWh	Not published
DELTA Pro 3	$2,799	4,096Wh	4,000W / 8,000W (120V and 240V)	2,600W	113.5 lb	12kWh (36kWh as a 3-unit system)	10ms
DELTA Pro Ultra	$4,199 (list $5,799)	6,144Wh	7,200W / 10,800W (120V and 240V)	5,600W	181.8 lb (inverter 70 lb + battery 111.8 lb)	30kWh (90kWh as a 3-unit system)	Under 20ms; 0ms on its online-UPS outlets
DELTA Pro Ultra X	$7,999	12,288Wh (two batteries)	12,000W / not published (120V and 240V)	10,000W	292.7 lb (inverter 70.1 lb + two 111.3 lb batteries)	61.4kWh	Under 10ms standalone

Notes on the table:

Batteries: every model uses LiFePO4 (LFP) cells and puts out 120V pure sine wave AC; only the DELTA Pro 3, DELTA Pro Ultra and DELTA Pro Ultra X add 240V.
RIVER 2 (240): EcoFlow's current US listing gives 243Wh; older listings and reviews give the RIVER 2 as 256Wh.
RIVER 2 Max (500): the model EcoFlow's US store now sells is the 499Wh "RIVER 2 Max 500"; the earlier 512Wh RIVER 2 Max listing ($289) shows as sold out. Its UPS switchover is not published on the current listing; the 512Wh version's listing gave under 30ms.
RIVER 3: not sold on EcoFlow's US store. Specs from its Amazon US listing, which gives solar only as a 2.6-hour charge on 110W and the UPS switchover as 20ms; price is approximate.
RIVER 3 Max: EcoFlow's US store sells it as a RIVER 3 Plus plus a 286Wh Extra Battery 300 (10.4 lb + 7.7 lb). The RIVER 3 Plus's 858Wh ceiling needs the larger 572Wh Extra Battery 600 instead of the 300, and the Extra Battery 600 showed as sold out on October 12, 2026 (the 300 was $159).
Surge: the DELTA 3 Max page lists 2,400W continuous and a 3,400W X-Boost but no surge figure; the DELTA Pro Ultra X page lists no surge either.
Expansion: DELTA 3 and Plus take one extra battery (the 4,096Wh DELTA Pro 3 pack gets them to about 5kWh); the DELTA 3 Max Plus and Ultra Plus reach 10kWh and 11kWh with two DELTA Pro 3 extra batteries and EcoFlow's expansion adapter; DELTA Pro figures are two DELTA Pro Smart Extra Batteries per unit.
DELTA Pro: 120V only on its own; two units linked through EcoFlow's Double Voltage Hub give 240V.
DELTA Pro Ultra X: sold as whole-home backup (inverter plus two batteries) and meant to be wired in with EcoFlow's Smart Home Panel 3 or Smart Gateway; its UPS switchover rises to under 20ms through the panel.

Not in the table: the TRAIL 200 DC and TRAIL 300 DC ($109 and $159), which are DC-only batteries with no AC outlet, and EcoFlow's Smart Generator 3000 and 4000, which are dual-fuel engines that charge these stations (see below).

Which EcoFlow power station is right for you?

Use	Our pick	Why	Also consider
Camping and CPAP	RIVER 2 Pro (about $389 on Amazon; sold out at EcoFlow on October 12)	768Wh in 18.2 lb: about 16.3 hours of CPAP, two nights	DELTA 3 Classic for three nights (about 21.8 hours)
Apartment backup	DELTA 3 Classic ($499)	1,024Wh, 1,800W, 10ms UPS, no fuel, cheapest per Wh of the 1kWh models	DELTA 3 Plus if you have room for 1,000W of solar
A fridge through an outage	DELTA 3 Max Plus ($1,149)	About 11.6 hours on a 150W fridge, 1,000W solar, expandable to about 58 hours	DELTA 3 Max ($879) if one overnight outage is the goal
Whole-home backup with 240V	DELTA Pro 3 ($2,799)	4,000W at 120V and 240V, 4,096Wh, to 12kWh per unit, 10ms UPS	DELTA Pro Ultra for 7,200W and up to 30kWh
RV	DELTA 3 Ultra Plus ($1,599)	TT-30 (30A) outlet, 30A Anderson DC port, 1,600W solar, 3,072Wh	DELTA 3 Max Plus for smaller rigs without a 30A inlet

The figures here use planning draws: a conservative 150W average for a full-size fridge (a new ENERGY STAR model averages closer to 63W, so expect longer runtimes) and a conservative 40W for a CPAP (ResMed's battery guide lists about 8 to 20W for an AirSense 10 with its humidifier off, measured through ResMed's 12V DC converter, so expect longer CPAP runtimes than shown, especially from a 12V outlet, and up to about 55W with the humidifier at its highest setting, or about 67W with a heated tube as well).

Camping and CPAP. We plan on a conservative 40W for a CPAP; ResMed lists about 8 to 20W for an AirSense 10 without its humidifier. The RIVER 3 Plus is the most tempting small model (under 10ms UPS, under 30 dB, 10.4 lb), but 286Wh gives only about 6.1 hours of CPAP, less than one full night. The RIVER 2 Pro's 768Wh covers about 16.3 hours, or two nights, and costs about $389 on Amazon ($369 at EcoFlow, where it was sold out on October 12). For a three-night trip, the 26.7 lb DELTA 3 Classic covers about 21.8 hours. Our CPAP power station guide has the humidifier math.

Apartment backup. Where a gas generator is not an option, the DELTA 3 Classic is the value pick at $0.49 per Wh: a 150W fridge for about 5.8 hours, a 10W router for about 87 hours, and a 10ms switchover that keeps a modem and desktop PC running when the power drops. Pay $220 more for the DELTA 3 Plus if you will use a balcony panel setup above 500W or want the option of one extra battery. See our apartment picks.

A fridge through an outage. FoodSafety.gov says a closed refrigerator keeps food safe for up to 4 hours without power, so the goal is to outlast that by a wide margin. Both 2,048Wh DELTA 3 models run a 150W full-size fridge for about 11.6 hours continuously and much longer if you cycle it. The Max Plus earns its extra $270 over the Max with a 3,000W inverter, 1,000W of solar input, 2,600W charging from EcoFlow's Smart Generator 4000 with automatic start and stop, and expansion to 10kWh (about 58 hours on the same fridge). The Max is the better buy if an overnight outage is all you plan for.

Whole-home backup with 240V. Well pumps, electric dryers and central air conditioners commonly run on 240V, which only the DELTA Pro family delivers. The DELTA Pro 3 gives 4,000W at 120V or 240V, a 10ms UPS, and 23.2 hours on a fridge alone; it scales to 12kWh with two extra batteries or, as a three-unit system on EcoFlow's Smart Home Panel 2, to 36kWh. The DELTA Pro Ultra raises the output to 7,200W and the base battery to 6,144Wh and adds online-UPS outlets with a 0ms switchover. The original DELTA Pro is cheaper at $1,899 but is 120V only unless you buy two and link them.

RV. The DELTA 3 Ultra Plus is the only DELTA 3 model with both a 30A TT-30 outlet (plug a 30A RV cord straight in) and a 30A Anderson port for 12V gear, with 1,600W of solar input for a roof array. The DELTA 3 Ultra has the TT-30 outlet but half the solar input and no Anderson port. Smaller rigs without a 30A inlet can use the DELTA 3 Max Plus. Our van life and RV picks compare other brands.

How long will each EcoFlow run a refrigerator?

Runtime estimates use usable Wh = rated Wh x 0.85 (inverter and conversion losses) and runtime in hours = usable Wh / average load in watts. A full-size refrigerator averages about 150W as its compressor cycles; real results shift with the fridge's age, the room temperature and how often the door opens.

Model	Capacity	Full-size fridge (150W), base unit	Largest expansion	Fridge runtime at largest expansion
RIVER 2	243Wh	about 1.4 hours	Not expandable
RIVER 3	245Wh	about 1.4 hours	Not expandable
RIVER 3 Plus	286Wh	about 1.6 hours	858Wh	about 4.9 hours
RIVER 2 Max (500)	499Wh	about 2.8 hours	Not expandable
RIVER 3 Max	572Wh	about 3.2 hours	Not expandable as sold
RIVER 2 Pro	768Wh	about 4.4 hours	Not expandable
DELTA 3 Classic	1,024Wh	about 5.8 hours	Not expandable
DELTA 3 / DELTA 3 Plus	1,024Wh	about 5.8 hours	About 5,120Wh	about 29 hours
DELTA 3 Max	2,048Wh	about 11.6 hours	Not expandable
DELTA 2 Max	2,048Wh	about 11.6 hours	6,144Wh	about 34.8 hours
DELTA 3 Max Plus	2,048Wh	about 11.6 hours	10,240Wh	about 58 hours
DELTA 3 Ultra	3,072Wh	about 17.4 hours	Not expandable
DELTA 3 Ultra Plus	3,072Wh	about 17.4 hours	11,264Wh	about 63.8 hours
DELTA Pro	3,600Wh	about 20.4 hours	10,800Wh	about 61.2 hours
DELTA Pro 3	4,096Wh	about 23.2 hours	12,288Wh (one unit)	about 69.6 hours
DELTA Pro Ultra	6,144Wh	about 34.8 hours	30,720Wh (one unit)	about 174 hours (7.3 days)
DELTA Pro Ultra X	12,288Wh	about 69.6 hours	61,440Wh (one unit)	about 348 hours (14.5 days)

Worked example: the DELTA 3 Max Plus has 2,048 x 0.85 = about 1,741 usable Wh, and 1,741 / 150 = about 11.6 hours. A fridge is rarely the only load in an outage; add a 10W router, a 40W CPAP overnight and some lighting and phone charging, and divide by the new average. Our refrigerator runtime guide works through mixed loads.

RIVER vs DELTA vs DELTA Pro: what is the difference?

Family	Capacity	AC output	Voltage	Weight	Price range	Built for
RIVER	243Wh to 768Wh	300W to 800W	120V	7.7 to 18.2 lb	$209 to $369	Camping, CPAP, laptops, a router through a short outage
DELTA	1,024Wh to 3,072Wh (up to 11kWh expanded)	1,800W to 3,600W	120V	26.7 to 74.3 lb	$499 to $1,599	Fridge and essentials backup, RVs, job sites
DELTA Pro	3,600Wh to 12,288Wh (up to 61.4kWh per unit)	3,600W to 12,000W	120V; 240V on Pro 3, Pro Ultra, Pro Ultra X	99 to 293 lb, on wheels or in pieces	$1,899 to $7,999	Whole-home backup through a transfer switch or EcoFlow home panel

RIVER: the small ones

The RIVER line is two generations sold side by side. The newer RIVER 3 models are quieter (EcoFlow rates the RIVER 3 Plus under 30 dB) and switch over faster (under 10ms on the Plus and Max) but are smaller; the older RIVER 2 models are the better value per watt-hour, and the RIVER 2 Pro's 768Wh at $0.48 per Wh is the most battery in the family. None is rated above 800W of continuous output, so they are for electronics, CPAP machines, small fridges and lights, not kitchen appliances or pumps.

EcoFlow RIVER 2 ProBuy at EcoFlow Check price on Amazon

DELTA: the home-backup middle

The DELTA 3 series comes in three sizes (1kWh, 2kWh, 3kWh), and within each size the "Plus" is the model with more solar input and, in the Max and Ultra sizes, the only one that takes extra batteries. The DELTA 3 Classic is the stripped-down 1kWh model with no expansion. The DELTA 2 Max is the older 2kWh model that EcoFlow still sells; for $120 more, the DELTA 3 Max Plus gives 600W more output, a published under-10ms UPS switchover and expansion to 10kWh instead of 6kWh. Our DELTA 3 series comparison lines up the seven DELTA 3 models in detail.

EcoFlow DELTA 3 Max PlusBuy at EcoFlow Check price on Amazon

DELTA Pro: whole-home systems

The DELTA Pro models are built to connect to a home's wiring through a transfer switch or EcoFlow's Smart Home Panel, and three of the four deliver 240V. The DELTA Pro 3 is the one to buy for most homes: 240V from a single unit, 2,600W of solar input on two inputs, and EcoFlow's Smart Generator 4000 charging it over DC for multi-day outages. The DELTA Pro Ultra and Ultra X are modular (a separate inverter and 111 lb batteries) and aimed at houses that want 7.2kW to 12kW and tens of kilowatt-hours. Our DELTA Pro vs DELTA Pro Ultra comparison covers the trade-offs.

EcoFlow DELTA Pro 3Check price on Amazon Buy at EcoFlow

Which EcoFlow is the best value per watt-hour?

Dividing EcoFlow's US price by rated capacity, the cheapest storage in the lineup is the DELTA 3 Max at $0.43 per Wh, then the DELTA 3 Ultra ($0.44), the RIVER 2 Pro ($0.48, sold out at EcoFlow on October 12), the DELTA 3 Classic ($0.49), the DELTA 2 Max ($0.50) and the DELTA 3 Ultra Plus ($0.52). The priciest per Wh are the RIVER 3 and RIVER 3 Plus (about $1.02 and $0.98) and, at the top, the DELTA Pro 3 and DELTA Pro Ultra (about $0.68 each), where you are paying for 240V output and whole-home integration rather than raw capacity. The pattern is consistent: within each DELTA 3 size, the non-Plus model is the cheaper storage and the Plus model charges you for solar input and expansion.

Can EcoFlow power stations charge from a gas generator?

All of them can charge from any generator's AC outlet through their own wall charger, at their normal AC charging speed. EcoFlow also sells two dual-fuel (gasoline or propane) Smart Generators that start themselves when a paired station's battery runs low. The $749 Smart Generator 3000 charges over AC and auto-starts with the DELTA 3, DELTA 3 Plus and DELTA 3 Ultra Plus. The $1,259 Smart Generator 4000 adds a 3,200W DC link and auto-starts with the DELTA Pro 3, DELTA Pro, DELTA 2 Max, DELTA 3, DELTA 3 Plus, DELTA 3 Max Plus and DELTA 3 Ultra Plus, but EcoFlow says it is not compatible with the DELTA Pro Ultra or any RIVER. Neither generator is sold in California. Our EcoFlow Smart Generator 4000 review has the compatibility chart and fuel math.

Which EcoFlow models are discontinued?

The DELTA 2 is gone from EcoFlow's US store, which now forwards its page to the DELTA 3; the DELTA 3 keeps the same 1,024Wh size and accepts DELTA 2 extra batteries (see our DELTA 2 review if you are looking at a leftover or used unit). The original DELTA Max, the 2kWh model before the DELTA 2 Max, no longer has a US store page. First-generation models such as the original RIVER, RIVER Max, DELTA mini and DELTA still have leftover pages on EcoFlow's US store but are no longer in its RIVER or power station collections. The DELTA 2 Max is not discontinued: EcoFlow still sells it at $1,029, alongside the newer DELTA 3 Max models.