EcoFlow RIVER 3 vs EcoFlow RIVER 3 Plus: manufacturer-published specifications compared

EcoFlow RIVER 3 vs EcoFlow RIVER 3 Plus: what the RIVER 3 Plus actually changes

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Specifications checked against manufacturer pages on 2026-08-23.

The EcoFlow RIVER 3 (245 Wh, 300 W) and the EcoFlow RIVER 3 Plus (286 Wh, 600 W), compared on the figures their makers publish. On the normalized ratios, the RIVER 3 costs less per watt-hour ($0.89/Wh vs $1.05/Wh); the RIVER 3 Plus recharges at a higher rate (4.8 Wh/min vs 4.1 Wh/min).

In short. The RIVER 3 leads on cost per watt-hour ($0.89/Wh vs $1.05/Wh) and watt-hours per pound (31.4 Wh/lb vs 27.5 Wh/lb); the RIVER 3 Plus leads on recharge rate (4.8 Wh/min vs 4.1 Wh/min) and continuous watts per dollar (2.01 W/$ vs 1.37 W/$). 2 of 6 measures tie or are not comparable. Pick by the one your outage will test.

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Check the current price

EcoFlow RIVER 3EcoFlow RIVER 3 on Amazon
EcoFlow RIVER 3 PlusEcoFlow RIVER 3 Plus on Amazon

Links go to the exact base unit we compared, not a bundle. Amazon prices change daily.

Specifications, side by side

Numbered notes below the table give the source location or a caveat for figures that need one; check marks mark the better figure where one can be judged; “Manufacturer does not state” means absent from that maker’s page as of its check date listed under Sources. UPS switchover is how long the outlets go dark when grid power drops.

Specification EcoFlow RIVER 3 EcoFlow RIVER 3 Plus
Rated capacity 245 Wh1 286 Wh2 ✓
Usable capacity (calculated)* 208–220 Wh 243–257 Wh
Continuous AC output 300 W3 600 W4 ✓
Surge output 600 W5 1,200 W6 ✓
Full recharge from wall 60 min7 60 min8
Cell chemistry LiFePO49 LiFePO410
Rated cycle life 3,000 cycles to 80%11,12 3,000 cycles to 80%13,14
UPS switchover <20 ms15 <10 ms16
Expandable Manufacturer does not state Yes, up to 858 Wh17,18
Max solar input 110 W19 220 W20 ✓
Max AC charging input 320 W21 380 W22 ✓
AC outlets 223 324 ✓
Highest USB-C port 100 W25 100 W26
App control Manufacturer does not state Yes27
Stated noise <30 dB28 <30 dB29
Warranty 2 years30 5 years31 ✓
Weight 7.8 lb32 ✓ 10.4 lb33
Manufacturer list price when checked $21934 ✓ $29935

* Calculated: rated capacity × an assumed 85–90% conversion efficiency; no maker publishes a usable figure.

Notes on the figures

  1. RIVER 3, rated capacity: Specs tab row. Also in headline bullet: “245Wh capacity, 300W rated output, X-Boost up to 600W”.
  2. RIVER 3 Plus, rated capacity: Specs table also lists “Capacity” / “286Wh”.
  3. RIVER 3, continuous output: Specs tab row. Headline bullet calls it “300W rated output”.
  4. RIVER 3 Plus, continuous output: AC Output row of the Specs table; also “600W rated output and 1200W X-Boost” in the bullet list.
  5. RIVER 3, surge: Maker lists a conventional “Surge 600W” and separately an X-Boost mode also rated 600W (“With X-Boost technology, it can power 600W heating devices”); X-Boost is a boost mode for resistive loads, not a surge rating.
  6. RIVER 3 Plus, surge: Manufacturer lists a conventional “Surge 1200W” and separately “X-Boost 1200W” (X-Boost is EcoFlow’s boost mode for resistive/heating loads); both are the same figure.
  7. RIVER 3, full recharge: Full 0-100% wall recharge. Body copy: “4 charging options, safely charge 0-100% in 1 hr” / “RIVER 3 fast-charges in 1 hour with X-Stream”.
  8. RIVER 3 Plus, full recharge: AC Input row of the Specs table; full 0-100% wall recharge. Body copy: “4 charging options, safely charge 0-100% in 1 hr”.
  9. RIVER 3, cell chemistry: Specs tab row. Body copy: “LiFePO4 cells, 10-year lifespan”.
  10. RIVER 3 Plus, cell chemistry: Battery Chemistry row of the Specs table.
  11. RIVER 3, cycle life: Specs table row ‘Battery Chemistry LiFePO4, 3000 cycles to 80% capacity’; body copy adds: “RIVER 3 has a lifespan of 3000 charging cycles.”
  12. RIVER 3, cycle life: Battery Chemistry LiFePO4, 3000 cycles to 80% capacity
  13. RIVER 3 Plus, cycle life: Body copy: “RIVER 3 Plus has a lifespan of 3000 charging cycles. That’s around 10 years of everyday use before its capacity drops to 80%.”
  14. RIVER 3 Plus, cycle life: LiFePO4, 3000 cycles to 80% capacity
  15. RIVER 3, UPS switchover: Upper bound (stated as “<20 ms”). Body copy: “your AC outlet will switch to the RIVER 3 supply in a barely noticeable 20 ms”.
  16. RIVER 3 Plus, UPS switchover: Upper bound: stated as “<10 ms” (Specs table row “UPS” / “<10 ms”).
  17. RIVER 3 Plus, expandable: Via RIVER 3 Plus Extra Battery EB300 (286Wh) or EB600 (572Wh).
  18. RIVER 3 Plus, expandable: Maximum system capacity with one EB600 extra battery (286Wh + 572Wh).
  19. RIVER 3, solar input: Specs tab row. Body copy: “Power up RIVER 3 in as fast as 2.6 hours with 110W solar input.”
  20. RIVER 3 Plus, solar input: Solar Input row of the Specs table; bullet list says “Up to 220W fast solar charging”.
  21. RIVER 3, AC input: Specs tab row. Generator Input row is also “320W, 0-100% in 60 min”.
  22. RIVER 3 Plus, AC input: AC Input row of the Specs table.
  23. RIVER 3, AC outlets: Specs tab row.
  24. RIVER 3 Plus, AC outlets: Body copy mentions “two rear AC outlets” as part of the UPS-friendly design.
  25. RIVER 3, USB-C: Single USB-C port, 100W max.
  26. RIVER 3 Plus, USB-C: USB-C Output row of the Specs table (one port).
  27. RIVER 3 Plus, app: The page mentions app and software alerts; it does not spell out Wi-Fi or Bluetooth control.
  28. RIVER 3, noise: Upper bound (stated as “<30 dB”). Body copy: “a volume of less than 30 dB at a distance of 1.5 ft”; footnote 2 says noise data is from lab tests at 89.6°F (32°C).
  29. RIVER 3 Plus, noise: Upper bound: Specs table row “Noise” / “<30 dB”; footnote says noise data is from lab tests at 89.6°F (32°C).
  30. RIVER 3, warranty: Not stated on the product page; EcoFlow’s official US warranty-policy page lists the RIVER 3 at 24 months.
  31. RIVER 3 Plus, warranty: Not stated on the product page; from the official EcoFlow US warranty policy table at https://us.ecoflow.com/pages/warranty-policy (row “RIVER 3 Plus” / “5 years”; note the base RIVER 3 row is “24” months).
  32. RIVER 3, weight: Specs tab row (net weight). Dimensions row: “10×8.3×4.4 in”.
  33. RIVER 3 Plus, weight: Specs table row “Net Weight” / “10.4 lb”.
  34. RIVER 3, price: Price shown for the standalone RIVER 3 option on us.ecoflow.com when checked; the option was marked “coming soon” and showed no strikethrough price, so we treat $219 as the list price.
  35. RIVER 3 Plus, price: Shown as the regular price on a page whose address is a flash-sale listing.

The same specs, normalized

Ratios, so the bigger unit does not win by default.

Measure RIVER 3 RIVER 3 Plus
Cost per watt-hour $0.89/Wh ✓ $1.05/Wh
Watt-hours per pound 31.4 Wh/lb ✓ 27.5 Wh/lb
Surge headroom 2.00× 2.00×
Recharge rate 4.1 Wh/min 4.8 Wh/min ✓
Rated cycle life 3,000 3,000
Continuous watts per dollar 1.37 W/$ 2.01 W/$ ✓

Definitions and direction of each ratio: How we verify.

What each one runs, for how long

Appliance RIVER 3 RIVER 3 Plus
Full-size refrigerator
150 W, 900 W start, 35% duty · eff. 85%–90%		 Unlikely to start 4.6–4.9 hr
Mini fridge
70 W, 400 W start, 30% duty · eff. 85%–90% / 80%–87%		 9.9–10.5 hr 11–12 hr
CPAP without humidifier
40 W · eff. 80%–87%		 4.9–5.3 hr 5.7–6.2 hr
CPAP with heated humidifier
95 W · eff. 85%–90% / 80%–87%		 2.2–2.3 hr 2.4–2.6 hr
Gas furnace blower
400 W, 1600 W start, 40% duty · eff. 85%–90%		 Will not run Unlikely to start
1/3 hp sump pump
500 W, 1800 W start, 15% duty · eff. 82%–88%		 Will not run Unlikely to start
Router and modem
20 W · eff. 70%–87%		 8.6–10.7 hr 10–12 hr
Laptop
60 W · eff. 85%–90% / 80%–87%		 3.5–3.7 hr 3.8–4.1 hr
1500W space heater
1500 W		 Will not run Will not run

Calculated, not measured: hours = rated Wh × efficiency ÷ (appliance W × duty); assumptions on How we verify. “Unlikely to start”: start-up surge exceeds the stated surge rating.

What the differences mean

Price per watt-hour. At the list prices we checked, the RIVER 3 costs $0.89/Wh against $1.05/Wh for the RIVER 3 Plus. At list the RIVER 3 is $80 cheaper ($219 vs $299) for 245 Wh vs 286 Wh. Prices move with sales; the ratio moves with them.

Weight for the capacity. The RIVER 3 carries 31.4 Wh/lb against 27.5 Wh/lb for the RIVER 3 Plus. Both are one-hand units; the difference matters if the unit moves between car, porch and basement.

Recharge. Both state about the same wall-charge time (60 and 60 minutes); the RIVER 3 Plus leads on rate because it stores more in that time.

Output for the money. 2.01 W/$ on the RIVER 3 Plus against 1.37 W/$ on the RIVER 3: this is the ratio to read if your outage plan is one big appliance, not many small ones.

Which one, and for whom

On normalized measures the two split evenly: the RIVER 3 leads on cost per watt-hour ($0.89/Wh vs $1.05/Wh) and watt-hours per pound (31.4 Wh/lb vs 27.5 Wh/lb); the RIVER 3 Plus leads on recharge rate (4.8 Wh/min vs 4.1 Wh/min) and continuous watts per dollar (2.01 W/$ vs 1.37 W/$). The deciding figure is the one your own outage will test first:

  • CPAP overnight. Switchover: RIVER 3 under 20 ms, RIVER 3 Plus under 10 ms. A 40 W CPAP runs roughly 4.9–5.3 hr on the RIVER 3 and 5.7–6.2 hr on the RIVER 3 Plus. Neither covers a full night (8 hr) without a humidifier at this capacity, so here the hours decide, not switchover.
  • Keeping a refrigerator cold. The compressor has to start before hours matter. The RIVER 3 states a 600 W surge rating; the RIVER 3 Plus states a 1,200 W surge rating. A full-size refrigerator needs about 900 W to start.
  • A multi-day outage with a generator or solar to recharge from. Full recharge: RIVER 3 60 min, RIVER 3 Plus 60 min. Both state the same time; the RIVER 3 Plus puts more energy back in it (286 Wh vs 245 Wh).

Check the current price

EcoFlow RIVER 3EcoFlow RIVER 3 on Amazon
EcoFlow RIVER 3 PlusEcoFlow RIVER 3 Plus on Amazon

Links go to the exact base unit we compared, not a bundle. Amazon prices change daily.

Related reading

A 245–286 Wh battery cannot do what a gasoline generator does — neither unit’s continuous rating covers a 1,500 W space heater (see the runtime table) — but it also cannot poison a household. How often gasoline generators kill indoors — and how the official count keeps being revised — is documented in our CPSC revision matrix, and this page puts every verified unit on the same refrigerator scenario.

Ordering before a storm? Check the arrival date at checkout — a unit that ships tomorrow can beat a better one that ships next week. Amazon Prime includes fast delivery on eligible items and starts with a free trial; we earn a commission if you join.

Sources and method

Published specifications only; no bench tests. Method: How we verify. More: Comparisons.