Head-to-head test
EcoFlow DELTA 2 vs Jackery Explorer 1000 v2
For the same money the Explorer 1000 v2 is lighter, far quieter, and longer-lived than the DELTA 2 — whose one genuine edge is 300 more watts of sustained output for the space heaters and hair dryers that live above 1,500W.
Written by Ian SchneiderUpdated
Solar & Off-Grid Tester, Station Arena Test Desk
EcoFlow
DELTA 2
3,128Power Score · Appliance Class
$499.00 list · direct from EcoFlow
Jackery
Explorer 1000 v2
3,084Power Score · Appliance Class
$499.00 list · direct from Jackery
Spec deltas
The Jackery is 20 decibels quieter, and in this matchup that's most of the story. The Explorer 1000 v2 runs at 30dB where the DELTA 2's fan — its most-cited flaw — climbs to 50 under loadA1. For a unit that sits in your living room or two feet from your pillow, that's the difference between forgetting it's on and being reminded all night.
The Explorer backs the quiet with the rest of the value case: 23.8 pounds to the DELTA 2's 27, a 4,000-cycle battery against 3,000, a lower cost-to-own ($0.12 versus $0.16 per lifetime kWh), and a full recharge in about an hourB3. Reviewers call it one of the best-balanced mid-size units of the year, and the specs back the praiseB4.
The DELTA 2 isn't beaten flat, though. It pushes 1,800W of continuous output to the Explorer's 1,500 — real headroom for a space heater or hair dryer — takes an add-on battery where the Explorer is sealed, and costs $20 less. If you run big appliances or want to grow, that's a live case. For everyone else, the quieter, lighter, longer-lived Jackery wins.
What the Numbers Reveal
Each conclusion stated first — the numbers behind it on one line, the full analysis below.
Twenty decibels is not a rounding error — it's the gap between a soft hum and a fan you notice across the room, and the DELTA 2 lands on the loud side of it, spinning up at anything over 120 wattsA1 while the Explorer stays near-silent.
the Explorer runs 30dB vs the DELTA 2's 50dB under loadthe DELTA 2's fan is its most-cited complaint, triggering above ~120WA1both units get used for CPAP, home office, and overnight backup
Why it mattersAnyone running the unit indoors overnight — CPAP users especially — should start with the 30dB Jackery.
cost / lifetime kWh
Its move to LFP rated for 4,000 cyclesB2 both extends its life past the DELTA 2's 3,000 and drops cost-to-own to $0.12 a kilowatt-hour — and it does it while weighing three pounds less, so the longer-lived unit is also the easier one to carry.
the Explorer is rated 4,000 cycles vs the DELTA 2's 3,000the Explorer weighs 23.8 lbs vs the DELTA 2's 27the Explorer costs $0.12 per lifetime kWh vs the DELTA 2's $0.16
Why it mattersBuyers optimizing for years-of-service-per-dollar get more of both from the Explorer.
continuous output
The Explorer's higher 3,000W surge starts a compressor or pump with room to spare, but its 1,500W ceiling means a 1,600W space heater or hair dryer runs on the DELTA 2 and stalls on the Jackery — the DELTA 2's 300 extra sustained watts are the one job it does that the Explorer can't.
the DELTA 2 sustains 1,800W vs the Explorer's 1,500Wthe Explorer surges to 3,000W vs the DELTA 2's 2,700Whigh-draw appliances differ in whether they spike or sustain
Why it mattersIf your must-run list includes anything that pulls more than 1,500 watts continuously, the DELTA 2 is the safer inverter.
The specific dimensions that decide these two units — everything else is a tie.
What the Specs Don't Tell You
Selected because: Noise, output ceiling, and expansion are the three axes that decide this.
rated cycles
Three things separate these units, and they don't all point the same way. The Explorer wins noise decisively (30dB vs 50) and surge (3,000W vs 2,700). The DELTA 2 wins sustained output (1,800W vs 1,500) and expandability, since the Explorer is sealed at what it ships with.
Read that honestly and the split is clean: the Explorer is the better unit for quiet, everyday loads, and the DELTA 2 is the better unit for big appliances and future growth. The 300-watt output gap is narrow but real — it's the line between the two lists of things you can run without thinking.
Lifetime Value
Selected because: The Explorer's 4,000-cycle battery and lower cost-to-own carry its case.
cost / lifetime kWh
The Explorer is the cheaper unit to own even though it costs $20 more upfront. Its LFP battery is rated for 4,000 cycles to the DELTA 2's 3,000B2, which brings cost-to-own to $0.12 per lifetime kWh against $0.16 — a third more service life per dollar.
It also refills fast, hitting 100% in about an hour via the app's emergency charge modeB3, so a longer lifespan doesn't come with slower turnaround. The DELTA 2's answer is the lower sticker and its own strong 18-month reliability recordA3, but on cost-per-kilowatt-hour over the long haul, the Jackery leads.
Portability & Form Factor
Selected because: The Explorer is both lighter and quieter — a rare double.
weight
The Explorer pulls off an unusual double: it's both the lighter unit and the quieter one. At 23.8 pounds it's the easiest 1kWh-class box to lift in this comparisonB1, three pounds under the DELTA 2, and it does it while running 20dB quieter.
Usually you trade weight for something. Here you don't — the Jackery is the one you'd rather carry to the campsite and the one you'd rather sleep next to. The DELTA 2's portability isn't bad; it's just outclassed on both counts by the same rival.
Brand Trust
Selected because: EcoFlow's ecosystem and app outclass Jackery's; it's the DELTA 2's soft advantage.
This is where the DELTA 2 claws back ground. EcoFlow runs the deepest ecosystem in portable power and a well-rated app (4.6/5 on iOS), while Jackery's app is the weakest of the major brands, with multiple confusing apps and a mandatory login even offline.
Support is uneven at both — slow, receipt-strict warranty handling shows up in reports for each — so the practical advice is the same: buy from a retailer with an easy return window. On software and ecosystem, though, the DELTA 2 is the more modern citizen, which softens the loss.
Strengths & trade-offs
EcoFlow DELTA 2
Strengths
- +Higher AC output
- +Faster solar charging
Trade-offs
- –Shorter-lived battery — rated for 3,000 charge cycles vs the Explorer 1000 v2's 4,000, so it wears out sooner.
Jackery Explorer 1000 v2
Strengths
- +Lighter by 3.2 lb
- +Larger battery capacity
- +Rated for 4,000 charge cycles — much longer battery lifespan
Trade-offs
- –No major technical downsides compared to rival.
Will It Power Your Gear?
Scenario math and per-appliance runtimes, modeled from the spec record.
Scenario verdicts
We ran the math on six real-world scenarios. Here's which unit survives your actual life.
SCN-01 · 2 nights · needs 2,100Wh
Weekend Camping
Two nights off-grid with essential comfort
Neither unit
Neither unit can fully handle this scenario (needs 2,100Wh). You'd need a higher-capacity station or to cut back on usage.
Battery budget usedlower = more headroom
LOAD Phone Charger 15W×6h · LED Lights 40W×8h · Box Fan 75W×14h · CPAP Machine 40W×16h
SCN-02 · 8 hours · needs 1,645Wh
8-Hour Blackout
Keep the essentials running through a night without power
Neither unit
Neither covers a fridge-plus-lights blackout for a full eight hours alone; the load outruns both 1kWh batteries. The DELTA 2's edges here are coverage-shaped — it can add a battery to extend, and its 1,800W inverter starts more of what's in your house — while the sealed Explorer is capped at what it ships with. For serious outage planning, the DELTA 2 or a larger unit.
Battery budget usedlower = more headroom
LOAD Fridge 150W×8h · Router + Modem 20W×8h · LED Lights (4 bulbs) 40W×6h · Phone Charger 15W×3h
SCN-03 · 8 hours · needs 320Wh
CPAP Overnight
Sleep therapy without interruption — the #1 medical use case
Either unit
Both units clear a CPAP's ~320Wh night three times over, so runtime isn't the question — sleep is. At 30dB the Explorer is genuinely quiet 18 inches from your head; the DELTA 2 at 50dB, with a fan that wakes up above 120 watts, is the one you'll hear if it starts working. A capacity tie the Jackery wins on silence.
Battery budget usedlower = more headroom
LOAD CPAP Machine 40W×8h
SCN-04 · 8 hours · needs 910Wh
Remote Workday
Full work day off-grid without power anxiety
Neither unit
A laptop-monitor-router day lands near 910Wh, and neither unit clears it with real comfort — the Explorer is right at its usable edge, the DELTA 2 a hair past. Call it a draw on runtime. The tiebreak is the desk experience: the Explorer's near-silent fan makes it the better all-day office companion, while the DELTA 2's is the one you'll notice by mid-afternoon.
Battery budget usedlower = more headroom
LOAD Laptop 60W×8h · External Monitor 30W×8h · Router + Modem 20W×8h · Phone Charger 15W×2h
SCN-05 · 4 hours · needs 670Wh
Tailgate Party
Game day power for the crew
Either unit
Both handle game day easily. Since capacity isn't the deciding factor, consider weight: the lighter unit is easier to load into a truck bed. Also check if either has Bluetooth speaker-level noise. Fan sound matters in social settings.
Battery budget usedlower = more headroom
LOAD Blender 400W×0.5h · LED TV (55") 80W×4h · Bluetooth Speaker 15W×4h · Phone Charger (×3) 45W×2h
SCN-06 · 24 hours · needs 4,685Wh
Van Life Daily
A full day of mobile living — the ultimate endurance test
Neither unit
Neither unit can fully handle this scenario (needs 4,685Wh). You'd need a higher-capacity station or to cut back on usage.
Battery budget usedlower = more headroom
LOAD Mini-Fridge 150W×24h · Laptop 60W×4h · Phone Charger 15W×3h · LED Lights 40W×5h · Fan 75W×8h
The Load Test
RUNTIME = (Wh × 0.85) ÷ LOAD
None of the six scenarios above exactly yours? Build it. Toggle what you'd plug in; both units are tested against the combined draw.
Essentials
Comfort & Convenience
High-Draw Appliances
Test duration
8h
Continuous draw
205W
Projected runtime
Dead heat — both run this 205W load for roughly 4.2h. Pick on price, weight, or ports.
Modeled from the spec record — same math as the tables below. Methodology
Runtime by appliance
Real-world runtime estimates for common appliances, modeled at 85% inverter efficiency.¹
Essentials
The basics you need runningscale 0–60.6hComfort & Convenience
Makes off-grid life actually enjoyablescale 0–12.1hHigh-Draw Appliances
These reveal the real limitsscale 0–0.9h¹ Runtime = (capacity × 0.85) ÷ appliance watts. Within each group, all bars share one time scale (the group's longest runtime), so lengths are comparable across appliances; identical runtimes collapse into a single blue/orange bar. Actual runtime varies with battery age, temperature, and simultaneous loads — see methodology.
Conclusion
July 13, 2026
Verdict: the Explorer 1000 v2
The Jackery Explorer 1000 v2 is the better all-rounder for $20 more. It runs at 30dB to the DELTA 2's 50, weighs 23.8 lbs against 27, carries a 4,000-cycle battery to the DELTA 2's 3,000, and costs less to own ($0.12 vs $0.16 per lifetime kWh) — quieter, lighter, and longer-lived at once. The DELTA 2 keeps two real cards: 1,800W of continuous output against the Explorer's 1,500W, which matters for high-draw appliances, and an expansion path the sealed Explorer lacks. Unless you specifically need to run above 1,500 watts or grow capacity later, the Explorer is the one most people should buy.
Editor-assigned confidence, based on cited owner research and spec analysis.
List prices as of July 13, 2026. The links below open EcoFlow's and Jackery's current prices.
$499.00 list · direct from Jackery
or check the DELTA 2 price$499.00 list
Written by Ian Schneider, Solar & Off-Grid Tester · Station Arena Test Desk · Updated July 13, 2026
Measured Data
Benchmark scores and the full spec record, side by side.
Benchmark scores
Not rated for both units (minimum threshold unmet): RV Living, Food Truck.
Full specifications
ᵈ Derived: price ÷ rated capacity. See the data behind our comparisons →
Comparison ToolAdd more power stations, side by sideOpen Tool →How these numbers are produced
Numeric verification
Every figure on this page traces to our spec database or arithmetic on it — no estimated numbers.
Owner claims
Statements about owner experience are cited to published reviews — see Sources & Research Notes below.
Runtime model
Runtime = (rated capacity × 0.85 inverter efficiency) ÷ device wattage. Solar recharge estimates assume panels deliver 70% of rated output. Cold weather, battery age, and stacked loads reduce real-world results.
Power Score
Computed from 14 published spec dimensions, weighted per use-case bench. Higher is better; a unit must meet a bench's minimum threshold to be rated.
See the full weight table and data sourcing on our methodology page →Class ranking (the star rating)
Each unit's star score is a category ranking, not customer reviews — no buyer opinions feed it. We score every station on size-independent quality (value, output, portability, endurance, ports, warranty, and more), then percentile-rank it against the other units in its capacity class, so a class-leading compact unit and a class-leading whole-home unit can both earn 5★. Here, DELTA 2 rates 4.0/5 (39th percentile of 24 Everyday-class units), and Explorer 1000 v2 rates 3.8/5 (30th percentile of 24 Everyday-class units).
How the class ranking is computed →Test Notes & Caveats
Hidden gotchas and advantages we spotted that you won't find on the product page.
50dB versus 30dB is the whole matchup for indoor use
The DELTA 2 runs 50dB under load; the Explorer runs 30. That 20-decibel gap is the difference between background hum and a fan you notice, and the DELTA 2's is its most common complaint — it kicks on above roughly 120 watts. You can slow the DELTA 2's charge to quiet it, but the Explorer is simply the calmer unit at rest. If it lives in your living room or bedroom, this is the spec that decides it.
The Explorer is sealed — the DELTA 2 can grow
This one cuts against the Jackery. The Explorer 1000 v2 is a closed box: what you buy is the ceiling. The DELTA 2 accepts an add-on battery to extend runtime when your needs climb. If you're confident 1kWh is enough for good, the Explorer's other strengths carry the day. If you think you'll want more later, the DELTA 2 keeps that door open and the Jackery bolts it shut.
Surge Power: Inverter Quality Indicator
The Explorer 1000 v2 has a 2× surge-to-continuous ratio vs the DELTA 2's 1.5×. A higher ratio (≥2×) means the inverter handles motor startup surges better. That's critical for fridges, AC compressors, and power tools that briefly draw 2-3× their rated wattage. The DELTA 2 may trip when starting these appliances even though its continuous wattage looks sufficient.
4,000 cycles versus 3,000 — years, not just numbers
The Explorer's LFP battery is rated for 4,000 charge cycles to the DELTA 2's 3,000. In practice that's the Jackery still holding a full charge after the DELTA 2's pack has started to fade — roughly a third more service life. It's why the Explorer costs less per lifetime kilowatt-hour ($0.12 vs $0.16) despite the higher price tag, and the main reason it's the better long-term buy.
Full record above — the Test Desk pick is the Explorer 1000 v2.
Check Explorer 1000 v2 price →or check the DELTA 2 priceOwnership Analysis
What happens after you buy — true cost of ownership, brand trust, and growth potential.
Lifetime value
Service lifeyears at one full cycle per day
Lifetime energy delivered
Cost per delivered kWh
│ warranty ends · Reaching the cycle rating means ~80% capacity remains — degraded, not dead.
Analyst note
The DELTA 2 is cheaper to buy, but the Explorer 1000 v2 is cheaper to own. At $0.12/kWh over its lifetime vs $0.16/kWh, the Explorer 1000 v2's higher cycle life and capacity make each dollar go further over the years.
Brand trust
EcoFlow
Ecosystem
Largest in portable power — 12-15 models across DELTA Pro, DELTA 3, and RIVER 3 series, plus solar panels and smart home panels
Support
US-based phone/email/chat support (1-800-368-8604). Experiences are polarized — many report hassle-free prepaid-label replacements, but others report long waits and refurbished units sent for new claims. Pro tip: buying from Costco or Amazon gives you a stronger return safety net.
Community
Largest community in the space — Reddit r/Ecoflow_community (~31K members), multiple Facebook groups, and an official community forum
App experience
Rated 4.6/5 iOS (~8,400 ratings) · 4.2/5 Android (~17,000 ratings)
Unique strength
Fastest-charging technology (X-Stream), deepest product ecosystem, and most active innovation cadence. Supports up to 180kWh modular expansion with DELTA Pro Ultra X.
Worth knowing
The Oct 2025 DELTA Max 2000 recall (overheating/fire risk, 6 incidents) is worth noting. Also tested subscription paywalls for advanced app features in early 2025 before community backlash paused the plan. No parts or service offered out of warranty.
Jackery
Ecosystem
12-15+ models across Explorer (portable) and HomePower (home backup) series, plus SolarSaga panel ecosystem and innovative form factors
Support
US-based support but widely criticized. Reddit reports describe slow/dismissive responses, scripted AI agents, strict receipt requirements for warranty claims, and refurbished replacements for clearly defective units. Strongly recommended: buy from Costco or Amazon for return protection.
Community
Smallest community of the major brands — Reddit r/Jackery has ~2,000 members. YouTube presence is solid due to brand recognition.
App experience
Rated 2.3-3.3/5 iOS and Android — the weakest app experience of the major brands. Multiple confusing apps (Jackery app vs Jackery Home) and mandatory login even offline.
Unique strength
Highest brand recognition and widest retail distribution (Costco, Home Depot, Best Buy, Amazon). The "Toyota" of power stations — dependable, proven, wide availability. Innovative form factors like the Solar Gazebo and Solar Mars Bot.
Worth knowing
A couple of older models still ship NMC chemistry with a shorter rated lifespan, so check the cycle rating on the specific unit — though most of the current line has moved to LFP. Generally perceived as overpriced for the specs offered compared to newer competitors. App experience is significantly behind rivals.
Analyst note
EcoFlow is the more modern software citizen here: the deepest ecosystem in portable power and a genuinely good app (4.6/5 on iOS) against Jackery's, which is the weakest of the major brands — multiple confusing apps and a login required even offline. On hardware, though, Jackery's move to a 4,000-cycle LFP battery closes the gap that used to define the brand. Support is uneven at both, with receipt-strict warranty handling in the reports, so buy from a retailer with an easy return window either way and let the hardware, not the app, lead your decision.
Growth path
DELTA 2
EXPANDABLESupports EcoFlow expansion batteries, so you can add capacity later without replacing the base unit — useful if your needs may climb past 1,024Wh.
Accepts up to 500W of solar. Suitable for a 1-2 panel setup.
Generous port selection supports complex multi-device setups.
Expansion batteries are EcoFlow-specific. You're investing in the EcoFlow ecosystem.
Explorer 1000 v2
FIXED CAPACITYFixed at 1,070Wh, with no expansion — so size it for your needs up front rather than planning to add capacity later.
Accepts up to 400W of solar. Suitable for a 1-2 panel setup.
Adequate ports for most setups, but heavy users may want a power strip.
Realistic full solar rechargeat 70% of rated panel output — see methodology
Analyst note
Don't read the DELTA 2's expandability as a straight win here: it starts at 1,024Wh, below the Explorer 1000 v2's 1,070Wh, so a first expansion battery largely buys back capacity the Explorer 1000 v2 already includes. It only pulls ahead if you'd grow past 1,070Wh — short of that, the Explorer 1000 v2's larger fixed capacity is the simpler value.
What Owners Report
Patterns from published owner reports and long-term reviews — every claim cited to its source below.
EcoFlow DELTA 2
The DELTA 2 earns its trust the boring way: 18 months of testing through outages, camping, and daily home-office use, with fast charging and a reliable LFP battery the standout marksA3. It's proven, and its 1,800W inverter is the muscle the Explorer can't match.
The knock is the fan. It triggers above roughly 120 watts and runs 48-55dB under load — the unit's defining complaintA1 — though you can quiet it by slowing the charge in the appA2. Live with that and it's a strong, capable unit.
“When charging at 1200W the fans sound like a gaming laptop, though you can lower the charging speed in the app to silence it.”
Sources
portablepowerlab.com
Jackery Explorer 1000 v2
Reviewers line up behind the Explorer 1000 v2 as one of the best-balanced mid-size units of 2026 — light, quiet, fast-charging, and built on a 4,000-cycle LFP batteryB4B2. At 23.8 pounds it's called notably easy to carry for its classB1, and it reaches full charge in about an hourB3.
The honest limit is output: it pushes 1,500W continuousB4, enough for the vast majority of loads but short of the DELTA 2's 1,800W for the biggest appliances. Within that ceiling, it's hard to find a mid-size unit owners are happier with.
“At just 23.8 lbs it's easy to lift and carry — light for a 1kWh-class unit.”
Sources
backuppowerhub.com · outdoortechlab.com · rvoutfitting.com · thesolarlab.com · amusthavething.com
Sources & Research Notes
Every owner claim in this report is traceable to a published source. The bracketed references above resolve here.
Recurring owner themes
- Fan noise under moderate-to-high load is the dominant, repeatedly-cited complaint; the fan spins up above ~120W. [DELTA 2 · 3 entries]
- Light weight, fast ~1-hour charging, quiet operation, and a 4,000-cycle LFP battery make it a well-balanced value favorite; the main limit is 1,500W output. [Explorer 1000 v2 · 3 entries]
- A1
“Fans trigger at anything above 120 watts; at maximum load (1,500–1,800W) they run continuously at ~48–55 dB. Powering medical equipment above 120W in a bedroom means listening to the fans or running an extension cable out of the room.”
portablepowerlab.com — EcoFlow Delta 2 Review: 6 Months of Real Use; PCWorld — EcoFlow Delta 2 review · 2026 · [negative]
- A2
“When charging at 1200W the fans sound like a gaming laptop, though you can lower the charging speed in the app to silence it.”
PCWorld — EcoFlow Delta 2 power station review · 2026 · [mixed]
- A3
“After 18 months of real-world testing through multiple power outages, camping trips, and daily home-office use, the unit earned recognition for fast charging, reliable LiFePO4 battery chemistry, and expandability.”
portablepowerlab.com — EcoFlow Delta 2 Review: 6 Months of Real Use · 2026 · [positive]
- B1
“At just 23.8 lbs it's easy to lift and carry — light for a 1kWh-class unit.”
backuppowerhub.com / outdoortechlab.com — Explorer 1000 v2 review · 2026 · [positive]
- B2
“Moves to LiFePO4 chemistry rated for 4,000 charge cycles before capacity drops, dramatically increasing lifespan over the original lithium-ion model.”
backuppowerhub.com / rvoutfitting.com — Explorer 1000 v2 review · 2026 · [positive]
- B3
“Fast AC charging — consistently reached 100% in about 60-65 minutes from empty via the app's emergency charge mode, a big improvement over the original's long wait.”
thesolarlab.com / outdoortechlab.com — Explorer 1000 v2 review · 2026 · [positive]
- B4
“One of the strongest mid-size portable power stations of 2026, striking an excellent balance of portability, fast charging, quiet operation, and long-term battery reliability; pushes 1,500W continuous with a 3,000W surge.”
backuppowerhub.com / amusthavething.com — Explorer 1000 v2 review · 2026 · [positive]
Research compiled July 13, 2026.
Who Should Buy Which
Buy the DELTA 2 if you…
- →Your must-run list includes something above 1,500 watts — a space heater, a hair dryer — where the DELTA 2's 1,800W has the headroom.
- →You want to add capacity later; the DELTA 2 expands and the Explorer is sealed.
- →You want the lower price ($479) and a deeper app and ecosystem to grow into.
If neither fits
Both cap near 1kWh and 1,500-1,800W, so neither covers a whole-house outage or a 2,000W appliance. If that's the job, step up to a 2kWh-class unit with a bigger inverter rather than pushing either of these to its edge.
The Bottom Line
The Explorer 1000 v2 is the one most people should buy: quieter, lighter, and longer-lived than the DELTA 2 for $20 more, with a full recharge in about an hourB3. The 20dB noise gap alone settles it for anyone who runs the unit in the room they live in — and the 4,000-cycle battery means it's still going when the DELTA 2's is fadingB2.
The DELTA 2 keeps a real, narrow lane: 1,800W of sustained output for big appliances, an expansion path the Explorer lacks, and the lower price. If your list includes a space heater or you expect to grow, take it. Otherwise the Jackery does the everyday job better in almost every way that shows up while you're using it.
Frequently Asked Questions
Answers drawn from the spec record and cited owner research.
EcoFlow DELTA 2 vs Jackery Explorer 1000 v2 — which is better?
For most buyers, the Explorer 1000 v2. It's quieter (30dB vs 50), lighter (23.8 lbs vs 27), longer-lived (4,000 cycles vs 3,000), and cheaper to own — for $20 more upfront. Choose the DELTA 2 if you need to run appliances above 1,500 watts, since it sustains 1,800W to the Jackery's 1,500, or if you want to expand capacity later.
Which is quieter for a bedroom or CPAP?
The Explorer 1000 v2, by a wide margin — 30dB versus the DELTA 2's 50dB under load. The DELTA 2's fan is its single most-cited complaint and spins up above about 120 watts, which is exactly the range a CPAP runs in. For overnight, in-room use, the near-silent Jackery is the clear pick.
Can the Jackery Explorer 1000 v2 run a 1500W heater?
It's right at the edge. The Explorer sustains 1,500W, so a 1,500W heater leaves no headroom and a slightly higher-draw model may trip it. The DELTA 2's 1,800W inverter handles that load with margin to spare. If high-wattage appliances are on your list, the DELTA 2 is the safer choice.
Which lasts longer?
The Explorer, rated for 4,000 charge cycles to the DELTA 2's 3,000 — roughly a third more full cycles before the battery fades. Combined with its lower price-per-lifetime-kWh ($0.12 vs $0.16), it's the cheaper unit to own over the long haul despite the higher sticker.
Where to buy
EcoFlow DELTA 2
$499.00
$499.00 list · direct from EcoFlow
Jackery Explorer 1000 v2Pick
$499.00
$499.00 list · direct from Jackery
Prices may vary by retailer and are subject to change.