Capacity
Higher is better | Scale max: 1,260 Wh | DELTA (Gen 1) leads
DELTA (Gen 1) 1,260 Wh
RIVER 2 Max 512 Wh
DELTA (Gen 1): +748 Wh (+146.1%).
DELTA (Gen 1) vs RIVER 2 Max
VS
1,800W
Running power
500W
1,260 Wh
Battery
512 Wh
30.9 lbs
Weight
13.4 lbs
At a Glance
This comparison targets buyers choosing between two EcoFlow portables that sit far apart in power class. The DELTA (Gen 1) delivers 1800W of running output with 3300W surge capacity and a 1260 Wh battery, powering 40 out of 53 devices in our compatibility tests. The RIVER 2 Max manages 500W continuous and 1000W surge from a 512 Wh pack, covering 20 of those same 53 devices.
Every device the RIVER 2 Max can run, the DELTA can also handle, but the DELTA adds 20 more appliances to the list. Solar input differs significantly too: the DELTA accepts up to 400W and pairs with 19 compatible panels, while the RIVER 2 Max tops out at 220W across 17 panels. The key tradeoff is weight and longevity.
At 13.4 lbs, the RIVER 2 Max is less than half the DELTA's 30.9 lbs, and its LFP chemistry delivers 3000 charge cycles versus 800 for the DELTA's NMC cells.
Overall Winner
DELTA (Gen 1)
Powers 40 of 53 tested devices vs 20 for RIVER 2 Max
Home backup: DELTA (Gen 1) RV / mobile: RIVER 2 Max Solar: Tie
DELTA (Gen 1) wins overall, but the best pick depends on your use case.
Choose DELTA (Gen 1) if...
- + You want broader device compatibility
- + You need all-day runtime headroom
Choose RIVER 2 Max if...
- + Portability matters (13 lbs vs 31)
- + You value battery longevity (LFP, 3,000 cycles)
- + 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: 1,800 W | DELTA (Gen 1) leads
DELTA (Gen 1) 1,800 W
RIVER 2 Max 500 W
DELTA (Gen 1): +1,300 W (+260.0%).
Surge Power
Higher is better | Scale max: 3,300 W | DELTA (Gen 1) leads
DELTA (Gen 1) 3,300 W
RIVER 2 Max 1,000 W
DELTA (Gen 1): +2,300 W (+230.0%).
Weight
Lower is better | Scale best: 13.4 lbs | RIVER 2 Max leads
DELTA (Gen 1) 30.9 lbs (14.0 kg)
RIVER 2 Max 13.4 lbs (6.1 kg)
RIVER 2 Max: -17.4 lbs (56.4% lighter).
Battery Life
Higher is better | Scale max: 3,000 cycles | RIVER 2 Max leads
DELTA (Gen 1) 800 cycles
RIVER 2 Max 3,000 cycles
RIVER 2 Max: +2,200 cycles (+275.0%).
Where Compatibility Actually Differs
Out of 53 devices tested, 20 show a different result between these two stations.
Both can run: 20 · Differences: 38% (20/53) · Neither can run: 13
Only DELTA (Gen 1) can run 20
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
Toaster Oven RIVER 2 Max: Running + surge shortfall
Rice Cooker RIVER 2 Max: Running shortfall
Gas Furnace Fan (Blower) 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
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
Corded Drill / Hammer Drill RIVER 2 Max: Running + surge shortfall
Laser Printer RIVER 2 Max: Running + surge shortfall
Neither can run · 13 devices
These devices have startup surges that exceed both stations.
Microwave Oven (1000W)
Central AC (3-Ton)
Dehumidifier (70 Pint)
Portable AC (12,000 BTU)
Electric Clothes Dryer
RV Rooftop AC (13,500 BTU)
Circular Saw (Corded)
Electric Chainsaw (14-inch)
Pancake Air Compressor (6-Gallon)
Shop Vac (Wet/Dry, 5-6 HP Peak)
Sump Pump (1/2 HP)
Electric Water Heater (50 Gal)
Well Pump (1 HP)
Full Specs Comparison
| Spec | DELTA (Gen 1) | RIVER 2 Max |
|---|---|---|
| Capacity | 1,260 Wh ✓ | 512 Wh |
| Running Power | 1,800 W ✓ | 500 W |
| Surge Power | 3,300 W ✓ | 1,000 W |
| Weight | 30.9 lbs (14.0 kg) | 13.4 lbs (6.1 kg) ✓ |
| Energy Density | 90.0 Wh/kg ✓ | 83.9 Wh/kg |
| Portability Tier | portable | ultralight |
| Chemistry | NMC | LFP |
| Cycle Life | 800 | 3,000 ✓ |
| Expandable | No | No |
| UPS | No | No |
| AC Voltage | 120V | 120V |
Solar Charging
Best-case charging profile using compatible solar panels.
DELTA (Gen 1)
Max solar input 400 W
Connector XT60
Full charge time ~4.5h
Compatible panels 19/20
MPPT: 10-65V
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 (Gen 1)RIVER 2 Max
Emergency(2)
1/21/2
1/2
1/2
| Device | DELTA (Gen 1) | Runtime | RIVER 2 Max | Runtime |
|---|---|---|---|---|
| Full-Size Freezer (15-17 Cu. Ft.) | Safe | 5.5h | Safe | 2.2h |
| Sump Pump (1/2 HP) | Soft Start | 0.8h | Fail | N/A |
Entertainment(2)
2/21/2
2/2
1/2
EV & Transportation(2)
2/21/2
2/2
1/2
Heating & Cooling(7)
4/71/7
4/7
1/7
| Device | DELTA (Gen 1) | Runtime | RIVER 2 Max | Runtime |
|---|---|---|---|---|
| Box Fan (20-inch) | Safe | 10.6h | Safe | 4.3h |
| Central AC (3-Ton) | Voltage Fail | N/A | Voltage Fail | N/A |
| Dehumidifier (70 Pint) | Soft Start | 1h | Fail | N/A |
| Gas Furnace Fan (Blower) | Safe | 0.8h | Fail | N/A |
| Portable AC (12,000 BTU) | Soft Start | 0.6h | Fail | N/A |
| Space Heater (1,500W) | Safe | 0.6h | Fail | N/A |
| Window AC (8,000 BTU) | Safe | 1.2h | Fail | N/A |
Home Infrastructure(3)
1/31/3
1/3
1/3
| Device | DELTA (Gen 1) | Runtime | RIVER 2 Max | Runtime |
|---|---|---|---|---|
| Electric Water Heater (50 Gal) | Voltage Fail | N/A | Voltage Fail | N/A |
| Garage Door Opener (Residential) | Safe | 4.9h | Safe | 2h |
| Well Pump (1 HP) | Voltage Fail | N/A | Voltage Fail | N/A |
Kitchen Appliances(11)
10/111/11
10/11
1/11
| Device | DELTA (Gen 1) | Runtime | RIVER 2 Max | Runtime |
|---|---|---|---|---|
| 2-Slice Bread Toaster | Safe | 0.6h | Fail | N/A |
| Coffee Maker | Safe | 0.6h | Fail | N/A |
| Digital Air Fryer | Tight | 0.5h | Fail | N/A |
| Electric Skillet | Safe | 0.6h | Fail | N/A |
| Electric Stove (Single Burner) | Tight | 0.5h | Fail | N/A |
| Electric Water Kettle | Safe | 0.6h | Fail | N/A |
| Instant Pot (6 Qt) | Safe | 0.6h | Fail | N/A |
| Microwave Oven (1000W) | Fail | N/A | Fail | N/A |
| Rice Cooker | Safe | 0.9h | Fail | N/A |
| Slow Cooker | Safe | 2.9h | Safe | 1.2h |
| Toaster Oven | Tight | 0.5h | Fail | N/A |
Large Appliances(4)
3/41/4
3/4
1/4
| Device | DELTA (Gen 1) | Runtime | RIVER 2 Max | Runtime |
|---|---|---|---|---|
| Dishwasher | Tight | 0.5h | Fail | N/A |
| Electric Clothes Dryer | Voltage Fail | N/A | Voltage Fail | N/A |
| French Door Refrigerator | Safe | 4.3h | Safe | 1.7h |
| Washing Machine | Safe | 0.7h | 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)
1/50/5
1/5
0/5
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The Bottom Line
The DELTA (Gen 1) is the pick for home backup users and anyone who needs to run higher-draw appliances; its 1260 Wh capacity and 1800W output handle loads the RIVER 2 Max simply cannot reach. The RIVER 2 Max suits campers and day-trippers who prioritize a light, long-lasting battery for phones, laptops, and small electronics. With a compatibility score of 75.5 versus 40, the DELTA (Gen 1) wins this matchup decisively on device coverage and raw capability.
DELTA (Gen 1) vs RIVER 2 Max FAQ
Q Which is better for home backup, DELTA (Gen 1) or RIVER 2 Max?
DELTA (Gen 1) is the stronger overall choice in this matchup based on weighted compatibility across 53 tested devices.
Q Which has longer runtime, DELTA (Gen 1) or RIVER 2 Max?
DELTA (Gen 1) has higher battery capacity (1,260 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 (Gen 1) or RIVER 2 Max?
RIVER 2 Max is lighter at 13.4 lbs vs 30.9 lbs. RIVER 2 Max is rated ultralight for portability.
Q How many devices can each power station run?
DELTA (Gen 1) powers 40 of 53 tested devices, compared to 20 for RIVER 2 Max.