Ask three different outdoor-gear labs which portable power station is “best” in the roughly 1,000Wh class, and you’ll get three different answers: the Anker SOLIX C1000 Gen 2, the EcoFlow Delta 3 Plus, or the EcoFlow Delta 2. That’s not because the testers disagree on the facts — it’s because the facts point in different directions depending on what you’re optimizing for. Charge speed, expandability, and price all pull toward different winners. Below is what the evidence actually shows for each, and where the picture is still fuzzy.

We’ll say up front: Jackery is named in plenty of 2026 “best of” round-ups (the Explorer 1000 v2 shows up repeatedly as a comparison point, and the Jackery 300 gets a nod for basic device charging), but the depth of independently measured data on Jackery’s current 1kWh flagship is thinner than what’s available for the Anker and EcoFlow units. We’re noting that gap rather than papering over it with numbers we can’t back up.

Anker SOLIX C1000 Gen 2 — fastest charging, lightest build

The C1000 Gen 2 ships with a 1,024Wh LiFePO4 battery, a 2,000W pure sine wave inverter with 4,000W surge capacity, and a charging circuit that’s been independently and officially verified: Anker’s SOLIX C1000 Gen 2 holds a Guinness World Records title for the fastest recharging portable power station in its class, hitting full capacity in 43 minutes and 48 seconds during official testing. Most outlet reviews round that to “about 49 minutes,” and several confirm 80% charge in roughly 43 minutes and full charge in under an hour from a wall outlet.

It’s also consistently the lightest unit at this capacity tier, at around 24.9–25.2 lbs, with a body measuring 15.12 × 8.19 × 9.61 inches. Ports cover five AC outlets, three USB-C, one USB-A, and one 12V car socket — ten total.

Real-world runtime testing from one lab found: a window air conditioner (550W) ran about 1.5 hours on a full charge; a full-size refrigerator (150W running, 600W startup surge) ran over 6 hours; a 1,500W space heater ran 45 minutes. Solar input tops out at 600W, and with Anker’s 200W SOLIX RS40B panel, testers reported full recharge in roughly 1.8 to 2.1 hours depending on sun conditions.

GearJunkie gave the C1000 Gen 2 its Best Overall designation, and OutdoorGearLab separately concluded it’s the best power station for most people. The tradeoff: capacity is fixed. The 1,024Wh it ships with is all you get — there’s no expansion battery in this lineup, which matters if you’re thinking about scaling toward whole-home backup later.

Price is where things get messy across sources — more on that below — but figures ranged from $449 (a GearJunkie sale price) up to $649 depending on the outlet and date.

Read the OutdoorGearLab Anker SOLIX C1000 Gen 2 review

EcoFlow Delta 3 Plus — the expandable all-rounder, with an asterisk

The Delta 3 Plus also carries a 1,024Wh LFP battery (rated for 4,000 cycles to 80%), with 1,800W continuous AC output and a manufacturer-claimed 3,600W surge across six AC outlets, two USB-C, two USB-A, a car port, and two DC5521 ports. It charges via AC (1,500W), solar (500W), car (800W), or a smart generator, and EcoFlow’s dual solar-port setup means that with a full 1,000W of sun it can recharge in roughly 1.5 hours purely off-grid — a genuine differentiator from the Anker, which caps solar input lower.

TechRadar named it a top pick, calling it an excellent all-rounder with a fast 10ms UPS switchover — a meaningful jump from the 30ms switchover on prior EcoFlow generations, which reviewers say is now fast enough to keep desktops, NAS drives, and networking gear running without a restart.

Two things worth flagging plainly rather than smoothing over. First, an independent lab measured actual discharge efficiency at 88.9% (910Wh delivered from the rated 1,024Wh) and recharge efficiency at 86.8% — solid, but not the on-paper number. Second, and more significant: EcoFlow claims a 3,600W surge rating, but at least one independent reviewer could only get the unit to hold 2,600W, and only for about a minute. That’s a real gap between the spec sheet and the lab bench, not a rounding error, and buyers who need surge headroom for something like a table saw or air compressor should treat the manufacturer number skeptically until it’s reconciled.

The Delta 3 Plus’s real strength is expansion path: sources describe scaling from 1,024Wh today up to 5,000Wh over time with add-on batteries — roughly five times the ceiling of the fixed-capacity Anker. If you’re building toward a bigger home-backup system incrementally, this is the documented advantage.

Pricing again varies wildly: StorageReview lists it at $649 on EcoFlow’s own site at time of review, while other sources cite $829–$999. Treat any single number as a snapshot, not a fixed price.

Read the StorageReview EcoFlow Delta 3 Plus review

EcoFlow Delta 2 — the value pick, conditionally

The Delta 2 pairs the same class of 1,024Wh LFP battery (3,000+ cycles, roughly a 10-year expected life) with 1,800W output, and charges to 80% in about 50 minutes — independent testing puts full charge at 78 minutes via a 15A outlet, so it’s fast but not C1000-fast.

An independent runtime and efficiency test found real-world usable capacity drops with load and temperature: 932Wh usable at a 200W constant draw (about 91% of rated capacity), falling to 882Wh at 500W (88% efficiency), and down to 828Wh in -5°C cold. That’s useful, concrete data most spec sheets don’t give you, and it’s a reminder that “1,024Wh” rarely means 1,024Wh delivered.

Where the Delta 2 actually beat the Anker head-to-head: Outdoor Life’s own side-by-side testing found the C1000 had a slightly better efficiency rating on a large-appliance test and a long-term storage test, but the Delta 2 ran a grow light over an hour longer than the Anker on the same charge. That’s a genuinely scenario-specific result, not marketing — it’s the clearest evidence in this whole comparison that “best” really does shift with the use case.

The Delta 2’s expansion battery lifts capacity to 2,048Wh, and it can pair with a Smart Generator adapter compatible with Champion and Firman dual-fuel generators.

Price is the most inconsistent figure of the three units: one source cites $399–$449 on sale (down from a $999 launch MSRP), others cite $649–$749 or even $999 at full retail. One reviewer frames this plainly: in 2026 the Delta 2 is best treated as a value buy only at discounted prices — at full retail, the newer Delta 3 Plus (with its faster charging and improved USB-C output) is the better purchase. That’s a fair way to think about it: the Delta 2’s case rests entirely on catching a sale.

Read Outdoor Life’s tested power station comparison

What the cold-weather testing adds

One outdoor lab ran all three bestselling ~1,000Wh units through a Northern Michigan winter, checking charge speed, capacity retention at -20°F, and how long each kept ice-fishing electronics running on a frozen lake. That test confirms the same charge-speed hierarchy seen elsewhere — the Anker Solix C1000 charging in about 49 minutes, EcoFlow’s Delta 2 fastest to 80% at 50 minutes, and the Jackery Explorer 1000 v2 adding a 1-hour emergency mode as its distinguishing feature. Unfortunately, the specific cold-capacity-retention percentages for each brand at -20°F weren’t recoverable from that source in this research pass, so we’re not going to invent numbers here — if extreme-cold performance is your deciding factor, treat that as an open question worth checking directly against the source before you buy.

So which one is actually “best”?

Based on the evidence gathered here, there’s no single winner — and that’s the honest finding, not a hedge:

  • Fastest charge and lightest carry: Anker SOLIX C1000 Gen 2, backed by a Guinness World Record verification and the lowest weight in the class.
  • Room to grow into a bigger system: EcoFlow Delta 3 Plus, with a documented expansion path to roughly 5,000Wh — but verify its 3,600W surge claim against independent testing before counting on it for high-surge tools.
  • Cheapest, if you catch it on sale: EcoFlow Delta 2, whose value case only holds up at discounted pricing; at full retail the Delta 3 Plus is generally the better buy.
  • A specific, tested edge case: the Delta 2 outran the Anker on a continuous grow-light load by over an hour, even though the Anker tested more efficient on large appliances and long-term storage — proof that even within this trio, the ranking can flip depending on what you’re actually running.

One more practical note before you shop: prices for all three of these units swing by more than a hundred dollars depending on the source, the date, and ongoing flash sales — one comparison even found the same Anker unit listed anywhere from $449 to $649. Check current pricing directly before deciding; none of the figures above should be treated as fixed.

See TechRadar’s current power station rankings