Capacity
Higher is better | Scale max: 2,048 Wh | DELTA 2 Max leads
AC70 768 Wh
DELTA 2 Max 2,048 Wh
DELTA 2 Max: +1,280 Wh (+166.7%).
AC70 vs DELTA 2 Max
1,000W
Running power
2,400W
768 Wh
Battery
2,048 Wh
22.5 lbs
Weight
50.7 lbs
At a Glance
This comparison targets buyers weighing a compact, lighter power station against a high-capacity workhorse for home backup and extended off-grid use. The DELTA 2 Max delivers 2400W of running power and 2048 Wh of battery capacity, nearly tripling the AC70's 1000W output and 768 Wh reserve. That gap shows up clearly in device compatibility: the DELTA 2 Max powered 45 out of 53 tested devices, while the AC70 handled just 24.
EcoFlow's unit also accepts up to 1000W of solar input versus 500W for the AC70, and its battery is expandable for even greater capacity. The tradeoff is weight. At 22.5 lbs, the AC70 is less than half the DELTA 2 Max's 50.7 lbs, making it far easier to grab for day trips or car camping.
Both units use LFP chemistry rated for 3000 cycles.
Overall Winner
DELTA 2 Max
Powers 45 of 53 tested devices vs 24 for AC70
Home backup: DELTA 2 Max RV / mobile: Tie Solar: Tie
Choose AC70 if...
- + Portability matters (23 lbs vs 51)
- + You want faster solar recharging
Choose DELTA 2 Max 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: 2,400 W | DELTA 2 Max leads
AC70 1,000 W
DELTA 2 Max 2,400 W
DELTA 2 Max: +1,400 W (+140.0%).
Surge Power
Higher is better | Scale max: 4,800 W | DELTA 2 Max leads
AC70 2,000 W
DELTA 2 Max 4,800 W
DELTA 2 Max: +2,800 W (+140.0%).
Weight
Lower is better | Scale best: 22.5 lbs | AC70 leads
AC70 22.5 lbs (10.2 kg)
DELTA 2 Max 50.7 lbs (23.0 kg)
AC70: -28.2 lbs (55.7% lighter).
Battery Life
Higher is better | Scale max: 3,000 cycles | Tie
AC70 3,000 cycles
DELTA 2 Max 3,000 cycles
Delta: Tie (0%).
Where Compatibility Actually Differs
Out of 53 devices tested, 21 show a different result between these two stations.
Both can run: 24 · Differences: 40% (21/53) · Neither can run: 8
Only DELTA 2 Max can run 21
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
Microwave Oven (1000W) AC70: Running shortfall
Toaster Oven AC70: Running shortfall
Gas Furnace Fan (Blower) AC70: Running + surge shortfall
Portable AC (12,000 BTU) AC70: Running + surge shortfall
Space Heater (1,500W) AC70: Running shortfall
Dehumidifier (70 Pint) AC70: Surge shortfall
Window AC (8,000 BTU) AC70: Needs soft-start
Dishwasher AC70: Running shortfall
Washing Machine AC70: Running shortfall
Corded Drill / Hammer Drill AC70: Running + surge shortfall
Shop Vac (Wet/Dry, 5-6 HP Peak) AC70: Running + surge shortfall
Sump Pump (1/2 HP) AC70: Running + surge shortfall
EV Charger (Level 1, 120V) AC70: Running shortfall
Professional Hair Dryer AC70: Running 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)
Electric Water Heater (50 Gal)
Well Pump (1 HP)
RV Rooftop AC (13,500 BTU)
Full Specs Comparison
| Spec | AC70 | DELTA 2 Max |
|---|---|---|
| Capacity | 768 Wh | 2,048 Wh ✓ |
| Running Power | 1,000 W | 2,400 W ✓ |
| Surge Power | 2,000 W | 4,800 W ✓ |
| Weight | 22.5 lbs (10.2 kg) ✓ | 50.7 lbs (23.0 kg) |
| Energy Density | 75.3 Wh/kg | 89.0 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
Max solar input 1,000 W
Connector XT60i
Full charge time ~7.3h
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 Max
Emergency(2)
1/22/2
1/2
2/2
Entertainment(2)
2/22/2
2/2
2/2
EV & Transportation(2)
1/22/2
1/2
2/2
Heating & Cooling(7)
1/76/7
1/7
6/7
| Device | AC70 | Runtime | DELTA 2 Max | Runtime |
|---|---|---|---|---|
| Box Fan (20-inch) | Safe | 6.5h | Safe | 17.3h |
| Central AC (3-Ton) | Voltage Fail | N/A | Voltage Fail | N/A |
| Dehumidifier (70 Pint) | Fail | N/A | Safe | 1.7h |
| Gas Furnace Fan (Blower) | Fail | N/A | Safe | 1.4h |
| Portable AC (12,000 BTU) | Fail | N/A | Tight | 1.1h |
| Space Heater (1,500W) | Fail | N/A | Safe | 1h |
| Window AC (8,000 BTU) | Soft Start | 0.8h | Safe | 2h |
Home Infrastructure(3)
1/31/3
1/3
1/3
| Device | AC70 | Runtime | DELTA 2 Max | Runtime |
|---|---|---|---|---|
| Electric Water Heater (50 Gal) | Voltage Fail | N/A | Voltage Fail | N/A |
| Garage Door Opener (Residential) | Safe | 3h | Safe | 8h |
| Well Pump (1 HP) | Voltage Fail | N/A | Voltage Fail | N/A |
Kitchen Appliances(11)
2/1111/11
2/11
11/11
| Device | AC70 | Runtime | DELTA 2 Max | Runtime |
|---|---|---|---|---|
| 2-Slice Bread Toaster | Fail | N/A | Safe | 1h |
| Coffee Maker | Fail | N/A | Safe | 0.9h |
| Digital Air Fryer | Fail | N/A | Safe | 0.8h |
| Electric Skillet | Fail | N/A | Safe | 1h |
| Electric Stove (Single Burner) | Fail | N/A | Safe | 0.8h |
| Electric Water Kettle | Fail | N/A | Safe | 1h |
| Instant Pot (6 Qt) | Fail | N/A | Safe | 1h |
| Microwave Oven (1000W) | Fail | N/A | Safe | 0.7h |
| Rice Cooker | Tight | 0.6h | Safe | 1.5h |
| Slow Cooker | Safe | 1.8h | Safe | 4.8h |
| Toaster Oven | Fail | N/A | Safe | 0.8h |
Large Appliances(4)
1/43/4
1/4
3/4
| Device | AC70 | Runtime | DELTA 2 Max | Runtime |
|---|---|---|---|---|
| Dishwasher | Fail | N/A | Safe | 0.8h |
| Electric Clothes Dryer | Voltage Fail | N/A | Voltage Fail | N/A |
| French Door Refrigerator | Safe | 2.6h | Safe | 6.9h |
| Washing Machine | Fail | N/A | Safe | 1.1h |
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)
0/52/5
0/5
2/5
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The Bottom Line
The AC70 suits buyers who prioritize portability and need moderate power for small electronics, lights, and low-draw appliances on the go. The DELTA 2 Max is the pick for home backup, heavy appliance support, and solar setups that demand serious wattage and expandable storage. With a score of 88.5 versus 46.5 and compatibility with nearly twice as many devices, the DELTA 2 Max is the clear winner in this matchup.
AC70 vs DELTA 2 Max FAQ
Q Which is better for home backup, AC70 or DELTA 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, AC70 or DELTA 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?
AC70 has the faster best-case solar recharge profile in our panel compatibility test set.
Q Which is more portable, AC70 or DELTA 2 Max?
AC70 is lighter at 22.5 lbs vs 50.7 lbs. AC70 is rated portable for portability.
Q How many devices can each power station run?
DELTA 2 Max powers 45 of 53 tested devices, compared to 24 for AC70.
Q Can you expand the battery capacity of AC70 or DELTA 2 Max?
Only DELTA 2 Max supports expansion batteries for additional capacity. AC70 is limited to its built-in 768 Wh.