Bluetti AC70 vs EcoFlow RIVER 2 Max

Side-by-side on the specs that decide it — surge, capacity, runtime and price.

Both models' specs verified against manufacturer listings · Last updated July 29, 2026

The short answer

EcoFlow RIVER 2 Max costs $200 less. Whether that gap is worth closing depends on what you need to run.

Bluetti AC70 holds 50% more energy (768Wh vs 512Wh), so it runs the same load proportionally longer.
Bluetti AC70 has 1000W more surge headroom (2000W vs 1000W) — that decides whether a fridge, pump or AC compressor will actually start.
EcoFlow RIVER 2 Max is 8.8 lb lighter (13.2 lb vs 22 lb).

⚠️ Before you buy

Neither of these will start a sump pump or well pump — both surge below the ~3,400W those motors need. If home backup with pumps is your use case, look at higher-surge models instead of either of these.

Bluetti AC70

768Wh with 1000W output at $499 — it does what the EcoFlow River 2 Pro does, with more output and more weight.

Best for: Campers who need to run a small fridge, not just charge devices.

Where it falls short:

22 lb — 5 lb heavier than the River 2 Pro
Not expandable

EcoFlow RIVER 2 Max

Double the River 2's capacity and output for $100 more. The sweet spot of EcoFlow's small line for anyone eyeing the occasional small appliance.

Best for: Campers who want headroom over a pure device charger without the size of a 1kWh unit.

Where it falls short:

Still not enough output for heaters or compressors
220W solar input is modest

Spec	Bluetti AC70	EcoFlow RIVER 2 Max
Price	$499	$299
Capacity	768 Wh	512 Wh
Continuous output	1000 W	500 W
Surge output	2000 W	1000 W
Battery	LiFePO4	LiFePO4
Rated cycles	3,000	3,000
Weight (lighter wins)	22 lb	13.2 lb
Max solar	500 W	220 W
Recharge time (faster wins)	1h 15m	1h

Runtime head-to-head

Appliance	Bluetti AC70	EcoFlow RIVER 2 Max
Refrigerator	10.9 hrs	7.3 hrs
Mini fridge	20.7 hrs	13.8 hrs
Chest freezer	8.2 hrs	5.4 hrs
CPAP machine	16.3 hrs	10.9 hrs
Sump pump	❌	❌

Bluetti AC70
Price → EcoFlow RIVER 2 Max
Price →