Stack / EFD350

EcoFlow DELTA 2 Max

Updated · 2 Oct 2026 · Sheet checked · 2 Oct 2026

Buy

Quiet expandable LiFePO₄: 2,400 W continuous and 2,048 Wh base. X-Boost 3,400 W is not continuous. Surge 4,800 W. ~50 lb. 120 V only. Not DELTA 2 or DELTA Pro.

What it is

Exact model EFD350. Not DELTA 2 (ZMR330-US, 1,800 W / 1,024 Wh), not DELTA Pro, not Pro 3. Peers: AC200L, F2000. LFP 2,048 Wh, pure-sine 2,400 W continuous / 4,800 W surge @ 120 V, six AC outlets, dual solar, app. ~50 lb; ~19.6 × 9.5 × 12 in. Up to two Smart Extra Batteries → ~6,144 Wh rated; continuous stays 2,400 W. 3,000 cycles to 80%+. AC in X-Stream max 1,800 W. Solar 11–60 V / 15 A (500 / 1,000 W). X-Boost ≤3,400 W is not continuous. EPS tens of ms — not UPS. Street prices not published.

What it will actually run

Running first: 2,400 W. Surge: 4,800 W. X-Boost ≤3,400 W — not continuous. Planning assumption (not manufacturer): usable Wh ≈ rated × 0.85, round down. Base: 2,048 × 0.85 → 1,740 Wh. At 500 W: ≈ 3.4 h. Two extras: 6,144 × 0.85 → 5,222 Wh → ~10.4 h @ 500 W (still 2,400 W capped).

Specs that matter

• Continuous 2,400 W @ 120 V; surge 4,800 W; X-Boost max 3,400 W
• Capacity 2,048 Wh LFP; planning usable ≈ 1,740 Wh; expand to 6,144 Wh
• AC in 1,800 W; solar dual 11–60 V / 15 A; no factory TT-30; 120 V only
• LFP 3,000 to 80%+; EPS tens of ms; icon station

Verdict

Buy for quiet 2,400 W / 2,048 Wh LFP expandable backup — roughly double DELTA 2 Wh, peer watts with AC200L/F2000, path to ~6 kWh. Still 120 V / 2,400 W continuous. Not 3,400 continuous, not DELTA 2, not Pro / Pro 3.

Source: EcoFlow DELTA 2 Max · EFD350 manual · DELTA 2 · AC200L

Size guide → · DELTA 2 sibling → · DELTA Pro sibling →