Bluetti AC200Max vs EcoFlow DELTA 2 Max: more surge headroom vs cheaper per watt-hour

Specifications checked against manufacturer pages on 2026-08-23. No affiliate links on this page yet; we add them only for products we can link directly.

The Bluetti AC200Max (2,048 Wh, 2,200 W) and the EcoFlow DELTA 2 Max (2,048 Wh, 2,400 W), compared on the figures their makers publish. On the normalized ratios, the AC200Max has more surge headroom (2.18× vs 2.00×); the DELTA 2 Max costs less per watt-hour ($0.63/Wh vs $0.83/Wh).

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.

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

Notes on the figures

1. AC200Max, rated capacity: 2,048Wh Capacity
2. DELTA 2 Max, rated capacity: Listed under “Capacity” on the manufacturer’s spec sheet for the base unit.
3. AC200Max, continuous output: 2,200W AC Pure Sine Wave Inverter (4,800W Surge)
4. DELTA 2 Max, continuous output: Total continuous AC output across all six outlets.
5. AC200Max, surge: 2,200W AC Pure Sine Wave Inverter (4,800W Surge)
6. DELTA 2 Max, surge: Conventional surge rating; the page separately markets a boost mode of 3400 W for resistive loads.
7. DELTA 2 Max, recharge: The manufacturer does not state a full 0-100% wall-recharge time. It states an 80% charge in 1.1 hours on AC alone, and 80% in 43 minutes when 1800 W AC input is combined with 600 W of solar input.
8. AC200Max, cell chemistry: LiFePO4 Battery with 3,500+ Life Cycles to 80%
9. DELTA 2 Max, cell chemistry: Listed under “Battery Chemistry” on the manufacturer’s spec sheet.
10. AC200Max, cycle life: LiFePO4 Battery with 3,500+ Life Cycles to 80%
11. DELTA 2 Max, cycle life: Rated to the point where at least 80% of original capacity remains.
12. DELTA 2 Max, cycle life: The manufacturer writes “80+%”, meaning 80 percent or more of the original capacity remains after the rated cycles.
13. DELTA 2 Max, UPS switchover: Upper bound. The page states the auto-switch to battery power happens in under 20 milliseconds.
14. AC200Max, expandable: Expandable Up To 6,144Wh with 2×B230, or 8,192Wh with 2×B300
15. DELTA 2 Max, expandable: Capacity expands by attaching up to two extra batteries.
16. DELTA 2 Max, expandable: Maximum system capacity with two extra batteries attached.
17. AC200Max, solar input: Solar Input: 900W Max., VOC 10-145VDC, 15A
18. DELTA 2 Max, solar input: Total across the two solar input ports; a single port accepts up to 500 W.
19. AC200Max, AC input: AC Adapter Input: 500W.
20. DELTA 2 Max, AC input: Maximum AC wall-charging input.
21. AC200Max, AC outlets: AC Outlets: 4 x 120V/20A Outlets 1 x 120V/30A NEMA TT-30 2200W In Total
22. DELTA 2 Max, AC outlets: Six household AC outlets sharing a 2400 W total output.
23. AC200Max, USB-C: USB-C Port: 1 x 100W Max.
24. DELTA 2 Max, USB-C: Per port; the unit has two USB-C ports.
25. AC200Max, app: From FAQ ‘Q3: Does AC200MAX support App control?’.
26. DELTA 2 Max, app: Controlled through the EcoFlow app; the spec sheet lists Wi-Fi and Bluetooth connectivity.
27. DELTA 2 Max, noise: Measured at a distance of approximately 20 inches, with low charging input and a 500 W output load, per the page’s own footnote.
28. AC200Max, warranty: Warranty: 48 Months (Learn more about BLUETTI warranty policy)
29. DELTA 2 Max, warranty: The maker markets this as an “Extensive 5-Year Warranty” on the product page.
30. AC200Max, weight: 61.9 lbs
31. DELTA 2 Max, weight: Net weight of the base unit; the same spec sheet lists the metric weight as 23 kg.
32. AC200Max, price: Manufacturer list price when checked; on sale at $1,199 that day.
33. DELTA 2 Max, price: List price; a sale price of $1,049.00 was shown.

The same specs, normalized

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

Definitions and direction of each ratio: How we verify.

What each one runs, for how long

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 DELTA 2 Max costs $0.63/Wh against $0.83/Wh for the AC200Max. At list the DELTA 2 Max is $400 cheaper ($1,299 vs $1,699) for 2,048 Wh vs 2,048 Wh. Prices move with sales; the ratio moves with them.

Weight for the capacity. The DELTA 2 Max carries 41.0 Wh/lb against 33.1 Wh/lb for the AC200Max. Both are cart-or-two-people units; the difference matters if the unit moves between car, porch and basement.

Surge headroom. The AC200Max’s stated 4,800 W surge is 2.18× its 2,200 W continuous rating, against 2.00× for the DELTA 2 Max (4,800 W over 2,400 W). Headroom is what starts a compressor or a pump; see the refrigerator and sump rows in the runtime table.

Cycle rating. The AC200Max is rated for 3,500 cycles against 3,000 for the DELTA 2 Max, both to the same remaining-capacity threshold — otherwise we would not compare them. At one full cycle a week the difference is measured in years, not months; at occasional outage use neither limit is reached.

Output for the money. 1.85 W/$ on the DELTA 2 Max against 1.29 W/$ on the AC200Max: if what you need is to run a high-draw appliance rather than to run a small one for days, this ratio is the one to read.

Which one, and for whom

On normalized measures the DELTA 2 Max leads on cost per watt-hour ($0.63/Wh vs $0.83/Wh), watt-hours per pound (41.0 Wh/lb vs 33.1 Wh/lb) and continuous watts per dollar (1.85 W/$ vs 1.29 W/$). The AC200Max answers on surge headroom (2.18× vs 2.00×) and rated cycle life (3,500 vs 3,000). What decides it is the figure your outage actually tests:

• CPAP overnight. Switchover: AC200Max no UPS figure stated, DELTA 2 Max under 20 ms. A 40 W CPAP runs roughly 36–42 hr on the AC200Max and 36–42 hr on the DELTA 2 Max. Both run the night with identical calculated hours; the AC200Max states no UPS figure, so the DELTA 2 Max’s stated switchover is the only separator here.
• Keeping a refrigerator cold. Start-up comes first. Both state a 4,800 W surge and both calculate to 31–34 hr on a full-size refrigerator, so this scenario does not separate them.
• A multi-day outage with a generator or solar to recharge from. Full recharge: AC200Max no recharge time stated, DELTA 2 Max 0–80% in 66 min (no full-charge time stated). These are not comparable: Bluetti states no full-charge time for the AC200Max.

Related reading

A 2,048 Wh battery cannot do what a gasoline generator does — the runtime table shows a 1,500 W space heater emptying either unit in about 1.2 hr — but it also cannot poison a household. Our CPSC revision matrix tracks how the official count of generator carbon-monoxide deaths has changed across report editions, and this page puts every verified unit on the same refrigerator scenario.

Other comparisons with these models

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• EcoFlow DELTA 2 Max vs EcoFlow DELTA Pro
• Bluetti AC200L vs EcoFlow DELTA 2 Max
• Bluetti AC200Max vs EcoFlow DELTA Pro
• EcoFlow DELTA 2 Max vs EcoFlow DELTA 3 Plus
• Bluetti Elite 200 V2 vs EcoFlow DELTA 2 Max

Sources and method

• Bluetti AC200Max: manufacturer product page, checked 2026-08-23.
• EcoFlow DELTA 2 Max: manufacturer product page, checked 2026-08-24.

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