Capacity
Higher is better | Scale max: 2,048 Wh | DELTA 2 Max leads
DELTA 2 Max 2,048 Wh
RIVER 2 Max 512 Wh
DELTA 2 Max: +1,536 Wh (+300.0%).
DELTA 2 Max vs RIVER 2 Max
VS
2,400W
Running power
500W
2,048 Wh
Battery
512 Wh
50.7 lbs
Weight
13.4 lbs
At a Glance
This comparison targets buyers choosing between two EcoFlow LFP stations that sit far apart in capacity and capability. The DELTA 2 Max delivers 2,400W of running power and 2,048 Wh of stored energy, while the RIVER 2 Max tops out at 500W and 512 Wh. That four-to-one gap in capacity shows up in real device coverage: the DELTA 2 Max powered 45 out of 53 tested devices, compared to just 20 for the RIVER 2 Max.
Solar input scales similarly, with the larger unit accepting up to 1,000W versus 220W on the RIVER 2 Max. Expandable battery support on the DELTA 2 Max adds long-term flexibility. The tradeoff is weight and portability.
At 13.4 lbs, the RIVER 2 Max is less than a third the weight of the 50.7 lb DELTA 2 Max, making it far easier to grab for day trips, car camping, or light travel.
Overall Winner
DELTA 2 Max
Powers 45 of 53 tested devices vs 20 for RIVER 2 Max
Home backup: DELTA 2 Max RV / mobile: RIVER 2 Max Solar: Tie
DELTA 2 Max wins overall, but the best pick depends on your use case.
Choose DELTA 2 Max if...
- + You want future battery expansion
- + You want broader device compatibility
- + You need all-day runtime headroom
Choose RIVER 2 Max if...
- + Portability matters (13 lbs vs 51)
- + You want faster solar recharging
Spec Snapshot
Absolute values shown. Bars are scaled within this comparison for readability.
Each metric is independent. Bar lengths are not comparable across different compare pages.
Running Power
Higher is better | Scale max: 2,400 W | DELTA 2 Max leads
DELTA 2 Max 2,400 W
RIVER 2 Max 500 W
DELTA 2 Max: +1,900 W (+380.0%).
Surge Power
Higher is better | Scale max: 4,800 W | DELTA 2 Max leads
DELTA 2 Max 4,800 W
RIVER 2 Max 1,000 W
DELTA 2 Max: +3,800 W (+380.0%).
Weight
Lower is better | Scale best: 13.4 lbs | RIVER 2 Max leads
DELTA 2 Max 50.7 lbs (23.0 kg)
RIVER 2 Max 13.4 lbs (6.1 kg)
RIVER 2 Max: -37.3 lbs (73.5% lighter).
Battery Life
Higher is better | Scale max: 3,000 cycles | Tie
DELTA 2 Max 3,000 cycles
RIVER 2 Max 3,000 cycles
Delta: Tie (0%).
Where Compatibility Actually Differs
Out of 53 devices tested, 25 show a different result between these two stations.
Both can run: 20 · Differences: 47% (25/53) · Neither can run: 8
Only DELTA 2 Max can run 25
2-Slice Bread Toaster RIVER 2 Max: Running + surge shortfall
Coffee Maker RIVER 2 Max: Running + surge shortfall
Digital Air Fryer RIVER 2 Max: Running + surge shortfall
Electric Skillet RIVER 2 Max: Running + surge shortfall
Electric Stove (Single Burner) RIVER 2 Max: Running + surge shortfall
Electric Water Kettle RIVER 2 Max: Running + surge shortfall
Instant Pot (6 Qt) RIVER 2 Max: Running + surge shortfall
Microwave Oven (1000W) RIVER 2 Max: Running + surge shortfall
Toaster Oven RIVER 2 Max: Running + surge shortfall
Rice Cooker RIVER 2 Max: Running shortfall
Dehumidifier (70 Pint) RIVER 2 Max: Running + surge shortfall
Gas Furnace Fan (Blower) RIVER 2 Max: Running + surge shortfall
Portable AC (12,000 BTU) RIVER 2 Max: Running + surge shortfall
Space Heater (1,500W) RIVER 2 Max: Running + surge shortfall
Window AC (8,000 BTU) RIVER 2 Max: Running + surge shortfall
Dishwasher RIVER 2 Max: Running + surge shortfall
Washing Machine RIVER 2 Max: Running + surge shortfall
Corded Drill / Hammer Drill RIVER 2 Max: Running + surge shortfall
Shop Vac (Wet/Dry, 5-6 HP Peak) RIVER 2 Max: Running + surge shortfall
Sump Pump (1/2 HP) RIVER 2 Max: Running + surge shortfall
Desktop PC (Gaming/Workstation) RIVER 2 Max: Running shortfall
EV Charger (Level 1, 120V) RIVER 2 Max: Running + surge shortfall
Portable Ice Maker (Countertop) RIVER 2 Max: Surge shortfall
Professional Hair Dryer RIVER 2 Max: Running + surge shortfall
Laser Printer RIVER 2 Max: Running + surge shortfall
Neither can run · 8 devices
These are 240V or high-voltage devices — neither station supports them.
Central AC (3-Ton)
Electric Clothes Dryer
Circular Saw (Corded)
Electric Chainsaw (14-inch)
Pancake Air Compressor (6-Gallon)
RV Rooftop AC (13,500 BTU)
Electric Water Heater (50 Gal)
Well Pump (1 HP)
Full Specs Comparison
| Spec | DELTA 2 Max | RIVER 2 Max |
|---|---|---|
| Capacity | 2,048 Wh ✓ | 512 Wh |
| Running Power | 2,400 W ✓ | 500 W |
| Surge Power | 4,800 W ✓ | 1,000 W |
| Weight | 50.7 lbs (23.0 kg) | 13.4 lbs (6.1 kg) ✓ |
| Energy Density | 89.0 Wh/kg ✓ | 83.9 Wh/kg |
| Portability Tier | portable | ultralight |
| Chemistry | LFP | LFP |
| Cycle Life | 3,000 | 3,000 |
| Expandable | Yes | No |
| UPS | No | No |
| AC Voltage | 120V | 120V |
Solar Charging
Best-case charging profile using compatible solar panels.
DELTA 2 Max
Max solar input 1,000 W
Connector XT60i
Full charge time ~7.3h
Compatible panels 19/20
MPPT: 11-60V
RIVER 2 Max
Faster Max solar input 220 W
Connector XT60i
Full charge time ~3.3h
Compatible panels 17/20
MPPT: 11-50V
Charge speed comparison
Longer bar = faster charge (inverted scale)
Device Compatibility
All tested devices grouped by category. Click a category to expand.
DELTA 2 MaxRIVER 2 Max
Emergency(2)
2/21/2
2/2
1/2
Entertainment(2)
2/21/2
2/2
1/2
EV & Transportation(2)
2/21/2
2/2
1/2
Heating & Cooling(7)
6/71/7
6/7
1/7
| Device | DELTA 2 Max | Runtime | RIVER 2 Max | Runtime |
|---|---|---|---|---|
| Box Fan (20-inch) | Safe | 17.3h | Safe | 4.3h |
| Central AC (3-Ton) | Voltage Fail | N/A | Voltage Fail | N/A |
| Dehumidifier (70 Pint) | Safe | 1.7h | Fail | N/A |
| Gas Furnace Fan (Blower) | Safe | 1.4h | Fail | N/A |
| Portable AC (12,000 BTU) | Tight | 1.1h | Fail | N/A |
| Space Heater (1,500W) | Safe | 1h | Fail | N/A |
| Window AC (8,000 BTU) | Safe | 2h | Fail | N/A |
Home Infrastructure(3)
1/31/3
1/3
1/3
| Device | DELTA 2 Max | Runtime | RIVER 2 Max | Runtime |
|---|---|---|---|---|
| Electric Water Heater (50 Gal) | Voltage Fail | N/A | Voltage Fail | N/A |
| Garage Door Opener (Residential) | Safe | 8h | Safe | 2h |
| Well Pump (1 HP) | Voltage Fail | N/A | Voltage Fail | N/A |
Kitchen Appliances(11)
11/111/11
11/11
1/11
| Device | DELTA 2 Max | Runtime | RIVER 2 Max | Runtime |
|---|---|---|---|---|
| 2-Slice Bread Toaster | Safe | 1h | Fail | N/A |
| Coffee Maker | Safe | 0.9h | Fail | N/A |
| Digital Air Fryer | Safe | 0.8h | Fail | N/A |
| Electric Skillet | Safe | 1h | Fail | N/A |
| Electric Stove (Single Burner) | Safe | 0.8h | Fail | N/A |
| Electric Water Kettle | Safe | 1h | Fail | N/A |
| Instant Pot (6 Qt) | Safe | 1h | Fail | N/A |
| Microwave Oven (1000W) | Safe | 0.7h | Fail | N/A |
| Rice Cooker | Safe | 1.5h | Fail | N/A |
| Slow Cooker | Safe | 4.8h | Safe | 1.2h |
| Toaster Oven | Safe | 0.8h | Fail | N/A |
Large Appliances(4)
3/41/4
3/4
1/4
| Device | DELTA 2 Max | Runtime | RIVER 2 Max | Runtime |
|---|---|---|---|---|
| Dishwasher | Safe | 0.8h | Fail | N/A |
| Electric Clothes Dryer | Voltage Fail | N/A | Voltage Fail | N/A |
| French Door Refrigerator | Safe | 6.9h | Safe | 1.7h |
| Washing Machine | Safe | 1.1h | Fail | N/A |
Medical(4)
4/44/4
4/4
4/4
Outdoor & RV(6)
5/64/6
5/6
4/6
Personal Care(2)
2/21/2
2/2
1/2
Power Tools(5)
2/50/5
2/5
0/5
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The Bottom Line
Buyers who need serious home backup power, heavy appliance support, or large solar setups should pick the DELTA 2 Max, which scored 88.5 in our testing and handled nearly every device we threw at it. The RIVER 2 Max earns its place for anyone prioritizing portability and quick solar top-ups, charging fully in about 3.3 hours. The DELTA 2 Max is the clear winner here, but the lighter RIVER 2 Max remains a smart choice when weight matters more than wattage.
DELTA 2 Max vs RIVER 2 Max FAQ
Q Which is better for home backup, DELTA 2 Max or RIVER 2 Max?
DELTA 2 Max is the stronger overall choice in this matchup based on weighted compatibility across 53 tested devices.
Q Which has longer runtime, DELTA 2 Max or RIVER 2 Max?
DELTA 2 Max has higher battery capacity (2,048 Wh), which generally supports longer runtime on the same load.
Q Which charges faster with solar panels?
RIVER 2 Max has the faster best-case solar recharge profile in our panel compatibility test set.
Q Which is more portable, DELTA 2 Max or RIVER 2 Max?
RIVER 2 Max is lighter at 13.4 lbs vs 50.7 lbs. RIVER 2 Max is rated ultralight for portability.
Q How many devices can each power station run?
DELTA 2 Max powers 45 of 53 tested devices, compared to 20 for RIVER 2 Max.
Q Can you expand the battery capacity of DELTA 2 Max or RIVER 2 Max?
Only DELTA 2 Max supports expansion batteries for additional capacity. RIVER 2 Max is limited to its built-in 512 Wh.