Verdict: the EcoFlow DELTA 3 Plus is one of the most complete 1 kWh power stations on the market. It combines a 1,024 Wh LiFePO4 battery, 1,800 W of output across 13 ports, five ways to recharge (including a 56-minute wall charge), a UPS switchover under 10 ms, near-silent operation under 600 W and the option to expand to 5 kWh. It’s our top pick for home backup. Its weak points are weight (27.6 lb) and a lower output ceiling than the Anker SOLIX C1000 Gen 2.
| Best for | Home backup that can grow, CPAP users, solar charging, RV and van life |
| Not ideal for | Backpacking or anyone who carries it often; running many high-watt appliances at once |
| Key numbers | 1,024 Wh · 1,800 W (3,600 W surge) · 13 ports · 56-min recharge · <10 ms UPS · 27.6 lb · 5-year warranty |
How we reviewed it: a specification-based review using EcoFlow’s official specifications and an independent spec review, plus our transparent runtime math. We have not tested this unit hands-on yet; we’ll add measured results when we do. See How We Research.
Pros and cons
| Pros | Cons |
|---|---|
| Expandable from 1 kWh up to 5 kWh with several EcoFlow extra batteries | 27.6 lb, heavier than Anker, Jackery and BLUETTI rivals |
| 13 output ports, including 6 AC outlets and two 140 W USB-C | 1,800 W output vs 2,000 W on the Anker SOLIX C1000 Gen 2 |
| Five charging methods; 0–100% from the wall in 56 minutes | Extra batteries add significant cost |
| Up to 1,000 W of solar input (2 × 500 W) | Fastest charging and smart features rely on the app |
| Under 30 dB at loads up to 600 W; UPS under 10 ms | |
| 5-year warranty; LiFePO4 rated 4,000 cycles to 80% |
Full specifications
| Capacity | 1,024 Wh |
| Battery | LFP (LiFePO4), 4,000 cycles to 80% capacity |
| Expansion | Up to 5 kWh with DELTA 2 EB, DELTA 2 Max EB, DELTA Pro 3 EB or DELTA 3 EB extra batteries |
| AC output | 6 outlets, 1,800 W total (3,600 W surge); up to 2,200 W devices with X-Boost |
| USB-C | 2 ports, 140 W max |
| USB-A | 2 fast-charge ports, 36 W max |
| 12 V car outlet | 1 port, 12.6 V, 10 A, 126 W max |
| DC5521 barrel outputs | 2 ports, 12.6 V, 3 A max |
| AC charging | 1,500 W; 0–100% in 56 minutes |
| Solar charging | 2 ports, 11–60 V, 500 W max each (1,000 W total) |
| Car charging | Up to 800 W (with EcoFlow’s alternator charger), full in about 1.3 hours |
| Smart generator charging | Up to 1,500 W |
| UPS switchover | Under 10 ms |
| Noise | Under 30 dB up to 600 W; under 40 dB up to 1,200 W |
| Battery pack protection | IP65-rated battery pack |
| App | Wi-Fi and Bluetooth; time-of-use scheduling and storm warning alerts |
| Dimensions | 15.7 × 8.0 × 11.2 in (397.6 × 202 × 283.6 mm) |
| Weight | 27.6 lb (12.5 kg) |
| Warranty | 5 years |
All 13 ports, and what to plug into each
| Port | Best used for |
|---|---|
| 6 × AC outlets (1,800 W total) | Refrigerator, TV, fans, lamps, microwave in short bursts, CPAP power brick |
| 2 × USB-C (140 W) | Laptops, tablets and phones; charging by USB-C skips the inverter and wastes less energy than using the AC outlet |
| 2 × USB-A (fast charge) | Phones, headlamps, small gadgets |
| 1 × 12 V car outlet (126 W) | 12 V compressor coolers, tire inflators and your CPAP maker’s DC converter for longer runtime |
| 2 × DC5521 barrel ports | Small 12 V devices such as some routers, LED strips and security cameras |
Five ways to recharge it
| Method | Max input | Time to full (from empty) |
|---|---|---|
| Wall outlet (AC) | 1,500 W | 56 minutes |
| Solar panels | 1,000 W (2 × 500 W) | About 1.5 hours of strong sun with 1,000 W of panels (our estimate) |
| Car (with EcoFlow’s 800 W alternator charger) | 800 W | About 1.3 hours while driving |
| Car (standard 12 V socket) | Much lower | Many hours; best for topping up |
| EcoFlow smart generator | 1,500 W | About an hour |
The fast wall charge is especially useful before a storm: EcoFlow notes that even a 30-minute charge gives you hours of backup. For multi-day outages, the 1,000 W solar input is the feature that matters most, and it’s twice what the Jackery Explorer 1000 v2 accepts. See our step-by-step solar charging guide.
What it can run, and for how long
| Device | Typical draw | Estimated runtime |
|---|---|---|
| Average full-size refrigerator | 1.5 kWh/day (~62 W average) | ~12 hours |
| Efficient ENERGY STAR refrigerator | 1.0 kWh/day (~42 W average) | ~16 hours |
| CPAP, humidifier off | ~30 W | ~2.7 nights |
| CPAP, humidifier on | ~55 W | ~1.7 nights |
| Wi-Fi router and modem | ~15 W | ~35 hours |
| Laptop (via AC) | ~50 W | ~14–15 hours |
| Box fan | ~50 W | ~14–15 hours |
| 50-inch LED TV | ~100 W | ~8 hours |
| Microwave | ~1,000 W | ~50 minutes of total cooking time |
| Space heater on high | ~1,500 W | ~35 minutes |
Three real-world scenarios
1. An overnight power outage
Refrigerator, Wi-Fi, a lamp and two phones add up to roughly 90–100 W on average. The DELTA 3 Plus covers about 9 hours of that, enough to get through the night. Unplugging the fridge for a few hours at a time (with a thermometer inside) stretches it further.
2. CPAP plus Wi-Fi for a weekend outage
A CPAP with the humidifier off (about 320 Wh per night) plus a router running 24 hours (about 360 Wh per day) uses roughly 680 Wh per day. That’s about 1.3 days on one charge; add 400 W of solar and it can keep going as long as the sun cooperates.
3. A long weekend of car camping
A 12 V compressor cooler, lights, phones and a laptop typically use a few hundred watt-hours per day. The DELTA 3 Plus covers two to three days, and its 800 W car charging refills it quickly while you drive between sites.
Noise: quiet enough for a bedroom
EcoFlow rates the DELTA 3 Plus under 30 dB with loads up to 600 W, roughly the level of a whisper, and under 40 dB up to 1,200 W. A CPAP, a fan and a phone charger together stay well under 600 W, so it can sit next to a bed. Fast charging at 1,500 W makes the fans work harder, so use the slower charging mode overnight.
Expandability: from 1 kWh to 5 kWh
This is the DELTA 3 Plus’s biggest advantage. It works with several EcoFlow extra batteries (DELTA 2 EB, DELTA 2 Max EB, DELTA Pro 3 EB and DELTA 3 EB), up to 5 kWh in total. At 5 kWh, the same average refrigerator would run for about two and a half days. You can start at 1 kWh and add capacity only if your outages turn out to be longer than expected.
Smart features in the app
- Remote monitoring over Wi-Fi or Bluetooth: battery level, input and output in real time.
- Storm warning alerts: the app can warn you about severe weather so you can top up the battery in time.
- Time-of-use scheduling: charge when electricity is cheapest and use battery power during peak hours, if your utility has time-of-use rates.
How it compares with its main rivals
| EcoFlow DELTA 3 Plus | Anker SOLIX C1000 Gen 2 | Jackery Explorer 1000 v2 | BLUETTI Elite 100 V2 | |
|---|---|---|---|---|
| Capacity | 1,024 Wh | 1,024 Wh | 1,070 Wh | 1,024 Wh |
| AC output | 1,800 W | 2,000 W | 1,500 W | 1,800 W |
| Fastest wall recharge | 56 min (full) | ~49 min (full) | ~1 hour (full) | ~45 min (to 80%) |
| Max solar | 1,000 W | 600 W | 400 W | 1,000 W |
| UPS | Under 10 ms | 10 ms | 20 ms or less | 10 ms |
| Expandable | Yes, to 5 kWh | No | No | Limited |
| Weight | 27.6 lb | 24.9 lb | 23.8 lb | 25.3 lb |
Read the head-to-heads: Anker vs EcoFlow, EcoFlow vs Jackery and BLUETTI vs EcoFlow. Wondering whether you need more capacity? See 1 kWh vs 2 kWh.
Don’t need expansion and want something lighter? The BLUETTI Elite 100 V2 matches the DELTA 3 Plus on capacity, output and 1,000 W solar input at 2.3 lb less. See our BLUETTI Elite 100 V2 review.
Frequently asked questions
Can the EcoFlow DELTA 3 Plus run a refrigerator?
Yes. Its 1,800 W output and 3,600 W surge easily start a full-size refrigerator, and it runs an average one for about 12 hours, or about 16 hours for an efficient ENERGY STAR model.
Is it good for a CPAP?
Very. It’s quiet under 600 W, switches to battery in under 10 ms if the power fails at night, and has a 12 V car outlet for your CPAP maker’s DC converter. Expect about 1.7 nights with the humidifier on and 2.7 with it off. See our best power stations for CPAP.
Is the DELTA 3 Plus waterproof?
No. The battery pack inside carries an IP65 rating, but the unit itself has open ports and cooling vents. Keep it dry and out of rain.
Can I use it while it’s charging?
Yes. That’s how the UPS feature works: leave it plugged into the wall with your devices plugged into it, and it takes over automatically when the grid fails.
Should I buy the DELTA 3 Plus or a 2 kWh model?
If you mainly need overnight backup and a CPAP, the DELTA 3 Plus is enough and can be expanded later. If you want a full day of refrigerator backup from day one, a 2 kWh unit such as the DELTA 3 Max Plus is simpler; see our 1 kWh vs 2 kWh comparison.
The bottom line
The EcoFlow DELTA 3 Plus is the most flexible 1 kWh power station we’ve analyzed: strong output, fast charging five different ways, quiet operation, a fast UPS and a clear upgrade path to 5 kWh. If you carry your power station often or want the most output in a fixed size, look at the Anker SOLIX C1000 Gen 2 or Jackery Explorer 1000 v2 instead.
Sources
- EcoFlow, DELTA 3 Plus Portable Power Station (official product page).
- StorageReview, EcoFlow DELTA 3 Plus Review (full specifications).
- Wellbots, DELTA 3 Plus specifications and compatible extra batteries.