Capacity
Higher is better | Scale max: 1,024 Wh | DELTA 3 Plus leads
AC70 768 Wh
DELTA 3 Plus 1,024 Wh
DELTA 3 Plus: +256 Wh (+33.3%).
AC70 vs DELTA 3 Plus
1,000W
Running power
1,800W
768 Wh
Battery
1,024 Wh
22.5 lbs
Weight
27.6 lbs
At a Glance
This comparison targets buyers choosing between a compact LFP portable station and a higher-capacity alternative for home backup or off-grid use. The DELTA 3 Plus delivers 1800W of running power and 1024 Wh of capacity, nearly doubling the AC70's 1000W output and exceeding its 768 Wh battery by roughly 33%.
That extra headroom matters: in device compatibility testing across 53 appliances, the DELTA 3 Plus powered 42 while the AC70 handled 24. EcoFlow's unit also supports expansion batteries and accepts up to 1000W of solar input, making it far more scalable for extended outages or larger solar arrays.
The tradeoff is weight and solar charge time. At 22.5 lbs, the AC70 is about 5 lbs lighter and refills from solar in roughly 2.7 hours versus 3.7 for the DELTA 3 Plus, giving it a portability edge for day trips and short camping runs.
Overall Winner
DELTA 3 Plus
Powers 42 of 53 tested devices vs 24 for AC70
Home backup: DELTA 3 Plus RV / mobile: Tie Solar: Tie
Choose AC70 if...
- + Portability matters for your setup
- + You want faster solar recharging
Choose DELTA 3 Plus 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 3 Plus leads
AC70 1,000 W
DELTA 3 Plus 1,800 W
DELTA 3 Plus: +800 W (+80.0%).
Surge Power
Higher is better | Scale max: 3,600 W | DELTA 3 Plus leads
AC70 2,000 W
DELTA 3 Plus 3,600 W
DELTA 3 Plus: +1,600 W (+80.0%).
Weight
Lower is better | Scale best: 22.5 lbs | AC70 leads
AC70 22.5 lbs (10.2 kg)
DELTA 3 Plus 27.6 lbs (12.5 kg)
AC70: -5.1 lbs (18.4% lighter).
Battery Life
Higher is better | Scale max: 4,000 cycles | DELTA 3 Plus leads
AC70 3,000 cycles
DELTA 3 Plus 4,000 cycles
DELTA 3 Plus: +1,000 cycles (+33.3%).
Where Compatibility Actually Differs
Out of 53 devices tested, 18 show a different result between these two stations.
Both can run: 24 · Differences: 34% (18/53) · Neither can run: 11
Only DELTA 3 Plus can run 18
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
Dehumidifier (70 Pint) AC70: Surge shortfall
Window AC (8,000 BTU) AC70: Needs soft-start
Dishwasher AC70: Running shortfall
Washing Machine AC70: Running shortfall
Sump Pump (1/2 HP) AC70: Running + surge shortfall
EV Charger (Level 1, 120V) AC70: Running shortfall
Professional Hair Dryer AC70: Running shortfall
Corded Drill / Hammer Drill AC70: Running + surge shortfall
Neither can run · 11 devices
These devices exceed both stations on running power and surge.
Microwave Oven (1000W)
Central AC (3-Ton)
Portable AC (12,000 BTU)
Electric Clothes Dryer
Circular Saw (Corded)
Electric Chainsaw (14-inch)
Pancake Air Compressor (6-Gallon)
Shop Vac (Wet/Dry, 5-6 HP Peak)
Electric Water Heater (50 Gal)
Well Pump (1 HP)
RV Rooftop AC (13,500 BTU)
Full Specs Comparison
| Spec | AC70 | DELTA 3 Plus |
|---|---|---|
| Capacity | 768 Wh | 1,024 Wh ✓ |
| Running Power | 1,000 W | 1,800 W ✓ |
| Surge Power | 2,000 W | 3,600 W ✓ |
| Weight | 22.5 lbs (10.2 kg) ✓ | 27.6 lbs (12.5 kg) |
| Energy Density | 75.3 Wh/kg | 81.9 Wh/kg ✓ |
| Portability Tier | portable | portable |
| Chemistry | LFP | LFP |
| Cycle Life | 3,000 | 4,000 ✓ |
| 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 3 Plus
Max solar input 1,000 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 3 Plus
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)
1/75/7
1/7
5/7
| Device | AC70 | Runtime | DELTA 3 Plus | 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 | Tight | 0.8h |
| Gas Furnace Fan (Blower) | Fail | N/A | Safe | 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 3 Plus | 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 3 Plus | 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 3 Plus | 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)
0/51/5
0/5
1/5
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The Bottom Line
The AC70 fits buyers who prioritize a lighter, grab-and-go station for small electronics and short outdoor trips, where its faster solar top-up and lower weight shine. The DELTA 3 Plus suits anyone needing broader appliance coverage, expandable storage, and stronger surge capacity for home backup or heavier loads. With a compatibility score of 76.5 versus 46.5 and support for nearly twice as many tested devices, the DELTA 3 Plus is the clear winner for most use cases.
AC70 vs DELTA 3 Plus FAQ
Q Which is better for home backup, AC70 or DELTA 3 Plus?
DELTA 3 Plus is the stronger overall choice in this matchup based on weighted compatibility across 53 tested devices.
Q Which has longer runtime, AC70 or DELTA 3 Plus?
DELTA 3 Plus 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 3 Plus?
AC70 is lighter at 22.5 lbs vs 27.6 lbs. AC70 is rated portable for portability.
Q How many devices can each power station run?
DELTA 3 Plus powers 42 of 53 tested devices, compared to 24 for AC70.
Q Can you expand the battery capacity of AC70 or DELTA 3 Plus?
Only DELTA 3 Plus supports expansion batteries for additional capacity. AC70 is limited to its built-in 768 Wh.