Capacity
Higher is better | Scale max: 1,024 Wh | DELTA 2 leads
AC70 768 Wh
DELTA 2 1,024 Wh
DELTA 2: +256 Wh (+33.3%).
AC70 vs DELTA 2
1,000W
Running power
1,800W
768 Wh
Battery
1,024 Wh
22.5 lbs
Weight
26.5 lbs
At a Glance
This comparison targets buyers weighing a midsize LFP power station for home backup, outdoor use, or solar charging. The DELTA 2 delivers 1800W of running power and 1024 Wh of capacity, while the AC70 comes in at 1000W and 768 Wh. That gap matters in practice: the DELTA 2 powered 39 of 53 tested devices compared to just 24 for the AC70, earning a compatibility score of 73.5 versus 46.5.
EcoFlow's unit also supports expansion batteries, giving it a clear edge for longer outages or heavier loads. Both stations share 3000-cycle LFP cells and 500W max solar input, though the AC70 reaches a full solar charge faster at roughly 2.7 hours versus 3.7 hours. At 22.5 lbs, the AC70 is four pounds lighter, a real advantage for car camping or grab-and-go kits.
The tradeoff is straightforward: portability and faster solar fills versus raw power and broader device coverage.
Overall Winner
DELTA 2
Powers 39 of 53 tested devices vs 24 for AC70
Home backup: DELTA 2 RV / mobile: Tie Solar: AC70
DELTA 2 wins overall, but the best pick depends on your use case.
Choose AC70 if...
- + Portability matters for your setup
- + You want faster solar recharging
Choose DELTA 2 if...
- + You want future battery expansion
- + You want broader device compatibility
- + You need all-day runtime headroom
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 2 leads
AC70 1,000 W
DELTA 2 1,800 W
DELTA 2: +800 W (+80.0%).
Surge Power
Higher is better | Scale max: 2,700 W | DELTA 2 leads
AC70 2,000 W
DELTA 2 2,700 W
DELTA 2: +700 W (+35.0%).
Weight
Lower is better | Scale best: 22.5 lbs | AC70 leads
AC70 22.5 lbs (10.2 kg)
DELTA 2 26.5 lbs (12.0 kg)
AC70: -4.0 lbs (15.0% lighter).
Battery Life
Higher is better | Scale max: 3,000 cycles | Tie
AC70 3,000 cycles
DELTA 2 3,000 cycles
Delta: Tie (0%).
Where Compatibility Actually Differs
Out of 53 devices tested, 15 show a different result between these two stations.
Both can run: 24 · Differences: 28% (15/53) · Neither can run: 14
Only DELTA 2 can run 15
2-Slice Bread Toaster AC70: Running shortfall
Coffee Maker AC70: Running shortfall
Digital Air Fryer AC70: Running shortfall
Electric Skillet AC70: Running shortfall
Electric Stove (Single Burner) AC70: Running shortfall
Electric Water Kettle AC70: Running shortfall
Instant Pot (6 Qt) AC70: Running shortfall
Toaster Oven AC70: Running shortfall
Gas Furnace Fan (Blower) AC70: Running + surge shortfall
Space Heater (1,500W) AC70: Running shortfall
Window AC (8,000 BTU) AC70: Needs soft-start
Dishwasher AC70: Running shortfall
Washing Machine AC70: Running shortfall
EV Charger (Level 1, 120V) AC70: Running shortfall
Professional Hair Dryer AC70: Running shortfall
Neither can run · 14 devices
These devices exceed both stations on running power and surge.
Microwave Oven (1000W)
Central AC (3-Ton)
Portable AC (12,000 BTU)
Dehumidifier (70 Pint)
Electric Clothes Dryer
Sump Pump (1/2 HP)
Electric Water Heater (50 Gal)
Well Pump (1 HP)
RV Rooftop AC (13,500 BTU)
Circular Saw (Corded)
Corded Drill / Hammer Drill
Electric Chainsaw (14-inch)
Pancake Air Compressor (6-Gallon)
Shop Vac (Wet/Dry, 5-6 HP Peak)
Full Specs Comparison
| Spec | AC70 | DELTA 2 |
|---|---|---|
| Capacity | 768 Wh | 1,024 Wh ✓ |
| Running Power | 1,000 W | 1,800 W ✓ |
| Surge Power | 2,000 W | 2,700 W ✓ |
| Weight | 22.5 lbs (10.2 kg) ✓ | 26.5 lbs (12.0 kg) |
| Energy Density | 75.3 Wh/kg | 85.3 Wh/kg ✓ |
| Portability Tier | portable | portable |
| Chemistry | LFP | LFP |
| Cycle Life | 3,000 | 3,000 |
| Expandable | No | Yes |
| UPS | No | No |
| AC Voltage | 120V | 120V |
Solar Charging
Best-case charging profile using compatible solar panels.
AC70
Faster Max solar input 500 W
Connector XT60
Full charge time ~2.7h
Compatible panels 19/20
MPPT: 12-58V
DELTA 2
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.
AC70DELTA 2
Emergency(2)
1/21/2
1/2
1/2
| Device | AC70 | Runtime | DELTA 2 | Runtime |
|---|---|---|---|---|
| Full-Size Freezer (15-17 Cu. Ft.) | Safe | 3.4h | Safe | 4.5h |
| Sump Pump (1/2 HP) | Fail | N/A | Soft Start | 0.6h |
Entertainment(2)
2/22/2
2/2
2/2
EV & Transportation(2)
1/22/2
1/2
2/2
Heating & Cooling(7)
1/74/7
1/7
4/7
| Device | AC70 | Runtime | DELTA 2 | Runtime |
|---|---|---|---|---|
| Box Fan (20-inch) | Safe | 6.5h | Safe | 8.6h |
| Central AC (3-Ton) | Voltage Fail | N/A | Voltage Fail | N/A |
| Dehumidifier (70 Pint) | Fail | N/A | Soft Start | 0.8h |
| Gas Furnace Fan (Blower) | Fail | N/A | Tight | 0.7h |
| Portable AC (12,000 BTU) | Fail | N/A | Soft Start | 0.5h |
| Space Heater (1,500W) | Fail | N/A | Safe | 0.5h |
| Window AC (8,000 BTU) | Soft Start | 0.8h | Safe | 1h |
Home Infrastructure(3)
1/31/3
1/3
1/3
| Device | AC70 | Runtime | DELTA 2 | Runtime |
|---|---|---|---|---|
| Electric Water Heater (50 Gal) | Voltage Fail | N/A | Voltage Fail | N/A |
| Garage Door Opener (Residential) | Safe | 3h | Safe | 4h |
| Well Pump (1 HP) | Voltage Fail | N/A | Voltage Fail | N/A |
Kitchen Appliances(11)
2/1110/11
2/11
10/11
| Device | AC70 | Runtime | DELTA 2 | Runtime |
|---|---|---|---|---|
| 2-Slice Bread Toaster | Fail | N/A | Safe | 0.5h |
| Coffee Maker | Fail | N/A | Safe | 0.4h |
| Digital Air Fryer | Fail | N/A | Tight | 0.4h |
| Electric Skillet | Fail | N/A | Safe | 0.5h |
| Electric Stove (Single Burner) | Fail | N/A | Tight | 0.4h |
| Electric Water Kettle | Fail | N/A | Safe | 0.5h |
| Instant Pot (6 Qt) | Fail | N/A | Safe | 0.5h |
| Microwave Oven (1000W) | Fail | N/A | Fail | N/A |
| Rice Cooker | Tight | 0.6h | Safe | 0.8h |
| Slow Cooker | Safe | 1.8h | Safe | 2.4h |
| Toaster Oven | Fail | N/A | Tight | 0.4h |
Large Appliances(4)
1/43/4
1/4
3/4
| Device | AC70 | Runtime | DELTA 2 | Runtime |
|---|---|---|---|---|
| Dishwasher | Fail | N/A | Tight | 0.4h |
| Electric Clothes Dryer | Voltage Fail | N/A | Voltage Fail | N/A |
| French Door Refrigerator | Safe | 2.6h | Safe | 3.5h |
| Washing Machine | Fail | N/A | 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)
1/22/2
1/2
2/2
Power Tools(5)
0/50/5
0/5
0/5
As an Amazon Associate, we earn from qualifying purchases. Our methodology
The Bottom Line
The AC70 suits buyers who prioritize a lighter, faster-charging station for small electronics and moderate loads on the go. The DELTA 2 is the better fit for anyone who needs to run higher-draw appliances or wants the option to add battery capacity later.
With nearly twice the device compatibility and 800W more running power, the DELTA 2 is the clear winner of this matchup. In our 53-device benchmark, AC70 powers 24 devices and DELTA 2 powers 39.
AC70 vs DELTA 2 FAQ
Q Which is better for home backup, AC70 or DELTA 2?
DELTA 2 is the stronger overall choice in this matchup based on weighted compatibility across 53 tested devices.
Q Which has longer runtime, AC70 or DELTA 2?
DELTA 2 has higher battery capacity (1,024 Wh), which generally supports longer runtime on the same load.
Q Which charges faster with solar panels?
AC70 has the faster best-case solar recharge profile in our panel compatibility test set.
Q Which is more portable, AC70 or DELTA 2?
AC70 is lighter at 22.5 lbs vs 26.5 lbs. AC70 is rated portable for portability.
Q How many devices can each power station run?
DELTA 2 powers 39 of 53 tested devices, compared to 24 for AC70.
Q Can you expand the battery capacity of AC70 or DELTA 2?
Only DELTA 2 supports expansion batteries for additional capacity. AC70 is limited to its built-in 768 Wh.