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EcoFlow DELTA 2 vs RIVER 2 Pro: Expandable 1 kWh or Grab-and-Go 768 Wh?

September 24, 2026

Last updated September 24, 2026. Manufacturer-spec comparison only—not a Boom lab test. Specs from EcoFlow’s DELTA 2 page at ecoflow.com/us (note: Shopify us.ecoflow.com/products/delta-2-portable-power-station currently 301s to DELTA 3—use the DELTA 2 path below) and the RIVER 2 Pro Shopify PDP (us.ecoflow.com/products/river-2-pro-portable-power-station; sold out language—confirm live stock). Note: ecoflow.com/us/river-2-pro-portable-power-station 404s. Real runtime depends on load, temperature, and inverter losses.

Two LFP EcoFlow boxes: a ~1 kWh / 1,800 W expandable mid-station versus a ~768 Wh / 800 W grab-and-go Pro in the RIVER 2 line. Off Grid Power Boom keeps the fork on printed Wh, watts, and whether capacity expands natively.

Index

Quick decision

  • Pick EcoFlow DELTA 2 when you want 1,024 Wh LFP, 1,800 W continuous (X-Boost into the ~2,200 W class), ~500 W solar, Extra Battery expansion into the ~2–3 kWh class, and EcoFlow’s app / Always-On backup wording.
  • Pick RIVER 2 Pro when you want 768 Wh in an ~18 lb footprint, 800 W AC (X-Boost to 1,600 W), ~70-minute full AC charge, 220 W solar input, and <30 ms EPS—accepting sold-out risk and no native Extra Battery stacking.

Check EcoFlow DELTA 2 (EcoFlow US) · Check EcoFlow RIVER 2 Pro (EcoFlow US)

Decision table (manufacturer-stated)

SpecEcoFlow DELTA 2EcoFlow RIVER 2 Pro
Capacity1,024 Wh (also printed as 1 kWh on EcoFlow US)768 Wh
Continuous AC1,800 W; X-Boost for higher loads (EcoFlow cites no-overload support into ~2,200 W class)800 W total (surge 1,600 W); X-Boost up to 1,600 W
Chemistry / cyclesLiFePO₄; 3,000+ full cycles to 80%+LFP; 80%+ after 3,000 cycles
Weight~27 lb / 12 kg class on Boom’s prior EcoFlow-sourced table—confirm live sheet (marketing stresses “portable & light”)Approximately 18.2 lb (PDP); some EcoFlow blog tables print 17.2 lb—preserve the conflict
AC charge highlight0–80% in ~50 minutes (X-Stream); ~80 minutes to 100% in EcoFlow lab graph note0–100% in ~70 minutes; AC input 940 W Max
Max solarUp to ~500 W solar input on current US materials220 W Max (11–50 V, 13 A)
USB-CUSB-C ports on EcoFlow port map (confirm live sheet for watt caps)100 W Max (in/out)
ExpandableYes — DELTA 2 / Max extra-battery paths into ~2–3 kWh classNo native Extra Battery path
App / backup wordingEcoFlow app; AC Always-On / EPS-style switchover languageEcoFlow app (Wi-Fi / Bluetooth); <30 ms EPS auto-switch
Warranty (pages)5 years5 years
Availability noteMarketing page live; Shopify delta-2 URL may 301 to DELTA 3—buy the nameplateUS Shopify shows sold out language as of this draft

Sources: EcoFlow DELTA 2 US, EcoFlow RIVER 2 Pro, EcoFlow RIVER 2 series.

Who should buy / who should skip

Buy DELTA 2 if…

  • You want EcoFlow expansion + 1,800 W in a ~1 kWh footprint for Arizona short outages / RV mid-loads.

Skip DELTA 2 if…

  • A storefront redirect lands you on DELTA 3—different product; re-check the URL and model label (see also RIVER vs DELTA 2).
  • ~27 lb mid-box is more than you will carry—RIVER 2 Pro is the lighter LFP lane if stock exists.

Buy RIVER 2 Pro if…

  • You find legitimate stock and want 768 Wh + 800 W (X-Boost 1,600 W) without buying a DELTA Extra Battery.

Skip RIVER 2 Pro if…

  • The PDP stays sold out—shop current EcoFlow mid-size instead of grey-market guesses.
  • You need native pack stacking for multi-day outages—DELTA 2’s extra-battery path is the clearer printed story.

Failure modes

  • Same chemistry, different class: 1,024 vs 768 Wh and 1,800 vs 800 W continuous are real deltas—do not treat X-Boost ceilings as rated AC.
  • Shopify remap: EcoFlow product URLs sometimes 301 to newer models—buy the nameplate.
  • Expansion vocabulary: RIVER 2 Pro has no native Extra Battery; DELTA 2 does.
  • Arizona heat: both LFP packs still need airflow; Pro PDP notes noise up to ~62 dB at high wattage.

Related Off Grid reading

Search EcoFlow DELTA 2 on Amazon · Search EcoFlow RIVER 2 Pro on Amazon