Capacity
Higher is better | Scale max: 1,260 Wh | DELTA (Gen 1) leads
DELTA (Gen 1) 1,260 Wh
DELTA 2 1,024 Wh
DELTA (Gen 1): +236 Wh (+23.0%).
DELTA (Gen 1) vs DELTA 2
VS
1,800W
Running power
1,800W
1,260 Wh
Battery
1,024 Wh
30.9 lbs
Weight
26.5 lbs
At a Glance
This comparison targets buyers choosing between two EcoFlow midrange stations that share the same 1800W running output and compatibility with 19 solar panels. The Gen 1 DELTA edges ahead on raw capacity at 1260 Wh versus 1024 Wh for the DELTA 2, and it delivers a higher 3300W surge compared to 2700W, which matters for momentary startup loads on tools or compressors.
In device testing across 53 appliances, the DELTA powered 40 while the DELTA 2 handled 39, giving the older model a slight coverage advantage. The tradeoff is longevity and flexibility: the DELTA 2 uses LFP chemistry rated for 3,000 cycles (nearly four times the Gen 1's 800), weighs 4.4 lbs less at 26.5 lbs, charges faster on solar with a 500W max input, and supports battery expansion for growing energy needs.
Overall Winner
DELTA (Gen 1)
Powers 40 of 53 tested devices vs 39 for DELTA 2
Home backup: DELTA (Gen 1) RV / mobile: Tie Solar: DELTA 2
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 DELTA 2 if...
- + Portability matters for your setup
- + You value battery longevity (LFP, 3,000 cycles)
- + You want faster solar recharging
- + You want future battery expansion
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 | Tie
DELTA (Gen 1) 1,800 W
DELTA 2 1,800 W
Delta: Tie (0%).
Surge Power
Higher is better | Scale max: 3,300 W | DELTA (Gen 1) leads
DELTA (Gen 1) 3,300 W
DELTA 2 2,700 W
DELTA (Gen 1): +600 W (+22.2%).
Weight
Lower is better | Scale best: 26.5 lbs | DELTA 2 leads
DELTA (Gen 1) 30.9 lbs (14.0 kg)
DELTA 2 26.5 lbs (12.0 kg)
DELTA 2: -4.4 lbs (14.3% lighter).
Battery Life
Higher is better | Scale max: 3,000 cycles | DELTA 2 leads
DELTA (Gen 1) 800 cycles
DELTA 2 3,000 cycles
DELTA 2: +2,200 cycles (+275.0%).
Compatibility Coverage
These two stations produce the same result on 52 of 53 devices. There is 1 difference.
Both can run: 39 · Differences: 2% (1/53) · Neither can run: 13
Neither can run · 13 devices
These devices have startup surges that exceed both stations.
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)
Central AC (3-Ton)
Dehumidifier (70 Pint)
Portable AC (12,000 BTU)
Electric Water Heater (50 Gal)
Well Pump (1 HP)
Microwave Oven (1000W)
Electric Clothes Dryer
RV Rooftop AC (13,500 BTU)
Full Specs Comparison
| Spec | DELTA (Gen 1) | DELTA 2 |
|---|---|---|
| Capacity | 1,260 Wh ✓ | 1,024 Wh |
| Running Power | 1,800 W | 1,800 W |
| Surge Power | 3,300 W ✓ | 2,700 W |
| Weight | 30.9 lbs (14.0 kg) | 26.5 lbs (12.0 kg) ✓ |
| Energy Density | 90.0 Wh/kg ✓ | 85.3 Wh/kg |
| Portability Tier | portable | portable |
| Chemistry | NMC | LFP |
| Cycle Life | 800 | 3,000 ✓ |
| Expandable | No | Yes |
| 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
DELTA 2
Faster Max solar input 500 W
Connector XT60i
Full charge time ~3.7h
Compatible panels 19/20
MPPT: 11-60V
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)DELTA 2
Emergency(2)
1/21/2
1/2
1/2
| Device | DELTA (Gen 1) | Runtime | DELTA 2 | Runtime |
|---|---|---|---|---|
| Full-Size Freezer (15-17 Cu. Ft.) | Safe | 5.5h | Safe | 4.5h |
| Sump Pump (1/2 HP) | Soft Start | 0.8h | Soft Start | 0.6h |
Entertainment(2)
2/22/2
2/2
2/2
EV & Transportation(2)
2/22/2
2/2
2/2
Heating & Cooling(7)
4/74/7
4/7
4/7
| Device | DELTA (Gen 1) | Runtime | DELTA 2 | Runtime |
|---|---|---|---|---|
| Box Fan (20-inch) | Safe | 10.6h | Safe | 8.6h |
| Central AC (3-Ton) | Voltage Fail | N/A | Voltage Fail | N/A |
| Dehumidifier (70 Pint) | Soft Start | 1h | Soft Start | 0.8h |
| Gas Furnace Fan (Blower) | Safe | 0.8h | Tight | 0.7h |
| Portable AC (12,000 BTU) | Soft Start | 0.6h | Soft Start | 0.5h |
| Space Heater (1,500W) | Safe | 0.6h | Safe | 0.5h |
| Window AC (8,000 BTU) | Safe | 1.2h | Safe | 1h |
Home Infrastructure(3)
1/31/3
1/3
1/3
| Device | DELTA (Gen 1) | Runtime | DELTA 2 | Runtime |
|---|---|---|---|---|
| Electric Water Heater (50 Gal) | Voltage Fail | N/A | Voltage Fail | N/A |
| Garage Door Opener (Residential) | Safe | 4.9h | Safe | 4h |
| Well Pump (1 HP) | Voltage Fail | N/A | Voltage Fail | N/A |
Kitchen Appliances(11)
10/1110/11
10/11
10/11
| Device | DELTA (Gen 1) | Runtime | DELTA 2 | Runtime |
|---|---|---|---|---|
| 2-Slice Bread Toaster | Safe | 0.6h | Safe | 0.5h |
| Coffee Maker | Safe | 0.6h | Safe | 0.4h |
| Digital Air Fryer | Tight | 0.5h | Tight | 0.4h |
| Electric Skillet | Safe | 0.6h | Safe | 0.5h |
| Electric Stove (Single Burner) | Tight | 0.5h | Tight | 0.4h |
| Electric Water Kettle | Safe | 0.6h | Safe | 0.5h |
| Instant Pot (6 Qt) | Safe | 0.6h | Safe | 0.5h |
| Microwave Oven (1000W) | Fail | N/A | Fail | N/A |
| Rice Cooker | Safe | 0.9h | Safe | 0.8h |
| Slow Cooker | Safe | 2.9h | Safe | 2.4h |
| Toaster Oven | Tight | 0.5h | Tight | 0.4h |
Large Appliances(4)
3/43/4
3/4
3/4
| Device | DELTA (Gen 1) | Runtime | DELTA 2 | Runtime |
|---|---|---|---|---|
| Dishwasher | Tight | 0.5h | Tight | 0.4h |
| Electric Clothes Dryer | Voltage Fail | N/A | Voltage Fail | N/A |
| French Door Refrigerator | Safe | 4.3h | Safe | 3.5h |
| Washing Machine | Safe | 0.7h | Safe | 0.6h |
Medical(4)
4/44/4
4/4
4/4
Outdoor & RV(6)
5/65/6
5/6
5/6
Personal Care(2)
2/22/2
2/2
2/2
Power Tools(5)
1/50/5
1/5
0/5
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The Bottom Line
Buyers who need the largest single-unit capacity and the highest surge ceiling for demanding appliances should pick the DELTA Gen 1, which scored 75.5 in our testing. The DELTA 2, scoring 73.5, is the better fit for anyone who values a longer battery lifespan, lighter carry weight, expandable storage, and faster solar charging at up to 500W. For most use cases, the Gen 1 DELTA wins on outright power and device coverage, making it the recommended choice unless cycle life or portability tips the scale for you.
DELTA (Gen 1) vs DELTA 2 FAQ
Q Which is better for home backup, DELTA (Gen 1) or DELTA 2?
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 DELTA 2?
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?
DELTA 2 has the faster best-case solar recharge profile in our panel compatibility test set.
Q Which is more portable, DELTA (Gen 1) or DELTA 2?
DELTA 2 is lighter at 26.5 lbs vs 30.9 lbs. DELTA 2 is rated portable for portability.
Q How many devices can each power station run?
DELTA (Gen 1) powers 40 of 53 tested devices, compared to 39 for DELTA 2.
Q Can you expand the battery capacity of DELTA (Gen 1) or DELTA 2?
Only DELTA 2 supports expansion batteries for additional capacity. DELTA (Gen 1) is limited to its built-in 1,260 Wh.