Head-to-head test
EcoFlow DELTA 2 vs Jackery Explorer 300
Real-world runtimes, scenario verdicts, and ownership costs compared — which wins for your use case.
Full profiles: EcoFlow DELTA 2 → · Jackery Explorer 300 →
Written by Wenny ZhengUpdated
Portable Power Tester, Station Arena Test Desk
$499.00 · direct from EcoFlow
Last checked 58 days ago. Prices move — check before you buy.
$289.00 · direct from Jackery
Last checked 1 day ago. Prices move — check before you buy.
Spec deltas
The EcoFlow DELTA 2 (1,024Wh) and Jackery Explorer 300 (293Wh) sit in different weight classes. The real question: do your power needs justify the larger unit, or would you be overpaying for capacity that sits unused? The DELTA 2 has a slight edge, but the margin is close enough that your use case should break the tie.
What the spec gap means in practice: the DELTA 2's 1,800W inverter has the headroom for a window AC, a full-size fridge, and power tools. The Explorer 300's 300W inverter can't run the heaviest of those — a window AC or a high-surge power tool needs more than it can hold, whatever its 500W surge ceiling does at the instant of startup. On stamina, the DELTA 2 keeps a fridge alive for roughly 6 hours vs the Explorer 300's 2 hours.
Pick the DELTA 2 if your primary use is cpap overnight or tailgate party. Go with the Explorer 300 if its specific strengths below line up better with your use. Most buyers stop at the sticker price and miss this: over a full lifespan the DELTA 2 works out to about $0.16/kWh against the Explorer 300's $1.1, a gap that compounds in the DELTA 2's favor the more you cycle it. Keep scrolling for the full breakdown. The scenario verdicts below hold a few surprises.
Bench Notes
What each unit does well, where it falls short, and the trade-offs that matter.
EcoFlow DELTA 2
The 1,800W inverter handles most daily devices like laptops, blenders, and TVs, but will struggle with heating elements that require over 1500W. A standout feature is the value proposition: at roughly $0.49 per watt-hour, it's one of the most cost-effective options on the market.
Strengths
- +Larger battery capacity
- +Higher AC output
- +Longer warranty
- +Faster solar charging
- +Rated for 3,000 charge cycles — much longer battery lifespan
Trade-offs
- –Substantially more expensive (+$240) than the Explorer 300.
- –Significantly heavier (+19.9 lbs), making it harder to move.
Jackery Explorer 300
At 300W, this unit is strictly for personal electronics (phones, laptops) and small CPAP machines. Do not expect to run kitchen appliances. At only 7.1 lbs, it is exceptionally portable. You can easily carry it one-handed to a campsite or tailgating party.
Strengths
- +Costs $240 less
- +Lighter by 19.9 lb
Trade-offs
- –Weaker inverter (-1,500W) limits appliance compatibility.
- –Lacks smartphone app control for remote monitoring.
- –Sealed capacity — the DELTA 2 can add batteries to grow past 293Wh; this one can't.
- –Shorter-lived battery — rated for 800 charge cycles vs the DELTA 2's 3,000, so it wears out sooner.
Will It Power Your Gear?
Scenario math and per-appliance runtimes, modeled from the spec record.
Scenario verdicts
We ran the math on seven 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 covers this scenario's 2,100Wh: the DELTA 2 comes up 1,230Wh short (about 41% covered), the Explorer 300 1,851Wh (12%). This is well outside what either unit is for; the right answer here is a larger station, not a choice between these two.
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 unit covers this scenario's 1,645Wh: the DELTA 2 comes up 775Wh short (about 53% covered), the Explorer 300 1,396Wh (15%). This is well outside what either unit is for; the right answer here is a larger station, not a choice between these two.
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
DELTA 2
The Explorer 300 doesn't finish — 249Wh usable against the 320Wh this needs leaves it 71Wh short, about 78% of the scenario covered. The DELTA 2 covers it with 550Wh to spare.
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
This scenario needs 910Wh and neither unit quite finishes it. The DELTA 2 lands within 5% of it — close enough that trimming one appliance, or accepting a shorter evening, gets you there on the day.
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
DELTA 2
The Explorer 300 can start the 400W peak but not hold it — 500W of surge gets it going, then the 300W continuous rating takes over. The DELTA 2 handles this scenario with 200Wh to spare.
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 covers this scenario's 4,685Wh: the DELTA 2 comes up 3,815Wh short (about 19% covered), the Explorer 300 4,436Wh (5%). This is well outside what either unit is for; the right answer here is a larger station, not a choice between these two.
Battery budget usedlower = more headroom
LOAD Mini-Fridge 150W×24h · Laptop 60W×4h · Phone Charger 15W×3h · LED Lights 40W×5h · Fan 75W×8h
SCN-07 · an afternoon · needs 100Wh
Afternoon Off-Grid
Phones and a speaker at the park, beach, or campsite — the small-unit job description
Either unit
This row is here for the Explorer 300's class of job: phones and a speaker, 100Wh across an afternoon. Both cover it — the Explorer 300 finishes at 40% used, and the DELTA 2 barely notices it. For this job the DELTA 2's extra capacity is dead weight, not headroom; take the Explorer 300 at 7.1 lbs and leave the rest at home.
Battery budget usedlower = more headroom
LOAD Phone Charger (×2) 30W×2h · Bluetooth Speaker 10W×4h
The Load Test
RUNTIME = (Wh × 0.85) ÷ LOAD
None of the 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
For this load: DELTA 2 runs 4.2h vs 1.2h.
$499 list · direct from EcoFlow
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 0–58hComfort & Convenience
Makes off-grid life actually enjoyablescale 0–11.6hHigh-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 10, 2026
Verdict: the DELTA 2, on Power Score margin
These two units are closely matched on individual specs, but our Power Score analysis gives the DELTA 2 the edge with a composite score of 2,994 vs 1,200.
Overall score margin: 2,994 vs 1,200 (+149.5%)
List prices as of July 10, 2026. The links below open EcoFlow's and Jackery's current prices.
$499.00 · direct from EcoFlow
Last checked 58 days ago. Prices move — check before you buy.
or check the Explorer 300 price$289.00 list
Written by Wenny Zheng, Portable Power Tester · Station Arena Test Desk · Updated July 10, 2026
Measured Data
Benchmark scores and the full spec record, side by side.
Benchmark scores
Not rated for both units (minimum threshold unmet): UPS, RV Living, Home Backup, CPAP, Solar Generator, 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.
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 4.1/5 (46th percentile of 27 Everyday-class units), and Explorer 300 rates 3.6/5 (19th percentile of 22 Personal-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.
DELTA 2: 50dB Published
50dB is about as loud as moderate rainfall. The Explorer 300 is rated 36dB — lower, but published by a different maker measuring its own way, so the two figures are not a like-for-like gap. For most people, fan noise around 45dB and up is where sleep starts to suffer.
Explorer 300: No App Control
Without app control, you have to physically walk to the Explorer 300 to check battery level, adjust settings, or monitor power draw. The DELTA 2 lets you do all that from your phone, including getting low-battery alerts.
Explorer 300: Fixed Capacity
The Explorer 300 is sealed at 293Wh — fine if that covers you, but it's the ceiling. By contrast the DELTA 2 can add expansion batteries, though the first thing it has over the Explorer 300 is its own 1,024Wh base — expansion is the step after that, for the buyer who would outgrow 1,024Wh as well.
Only the DELTA 2 Lists a UPS Mode
The DELTA 2 can sit between the wall and your gear and hand it to battery when the grid drops — rated ≤20ms — fine on paper for routers and most electronics; the fussiest PC power supplies sit right at this line. Worth it for a router, a desktop PC, or a CPAP. The Explorer 300's spec sheet lists no UPS mode, so anything plugged into it rides an outage only as far as your reaction time.
Warranty: 5 Years vs 2
The DELTA 2 is covered for 5 years against the Explorer 300's 2 years. An underrated factor if you're keeping this unit for years.
Battery Lifespan in Real Years
The DELTA 2 is rated for 3,000 cycles vs 800. In real life: at daily use, that's 8.2 vs 2.2 years. At weekend use (twice a week), it's 29 vs 8 years. One caution reading years across different sizes: a cycle is 1,024Wh on the DELTA 2 and 293Wh on the Explorer 300, so count lifetime energy — roughly 3,072 kWh against 234 kWh over the rated life. After hitting the cycle limit, the battery doesn't die — it drops to ~80% of original capacity, which is still very usable.
Full record above — the Test Desk pick is the DELTA 2.
Check DELTA 2 price →or check the Explorer 300 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 Explorer 300 is cheaper to buy, but the DELTA 2 is cheaper to own. At $0.16/kWh over its lifetime vs $1.1/kWh, the DELTA 2's higher cycle life and capacity make each dollar go further over the years.
Delivers each lifetime kWh for $0.94 less — check the DELTA 2 price →
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. At the very top of the range, the DELTA Pro Ultra platform stacks batteries and inverters into whole-home backup — a flagship path, not a line-wide feature.
Worth knowing
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 and Jackery are close competitors. Both have established support channels and growing ecosystems. Compare their specific warranty terms and community size for your peace of mind.
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 300
FIXED CAPACITYFixed at 293Wh, with no expansion — so size it for your needs up front rather than planning to add capacity later.
Accepts up to 100W of solar. Limited to a single portable panel.
Limited ports. You'll likely need a power strip or splitter.
Realistic full solar rechargeat 70% of rated panel output — see methodology
Analyst note
The Explorer 300 is sealed at 293Wh, which is fine if that covers you. The DELTA 2 starts at 1,024Wh and can grow beyond it with EcoFlow expansion batteries — though at this size expansion means longer runtimes on the same loads, not a path to home backup. More hours, not more house.
What Owners Actually Report
Drawn from 177 comments on independent review channels — not from retailer reviews, which skew to the first week of ownership. Each line is our summary of one commenter's claim, linked to the original. We record what they said, including where it contradicts the spec sheet.
EcoFlow DELTA 2
224 claims from 155 comments · 178 from owners · 60 with figures
- Runtime
- 32 · 13% negative
- Price & value
- 38 · 4% negative
- Charging
- 17 · 23% negative
- Durability
- 22 · 67% negative
- Warranty & support
- 22 · 59% negative
What owners complain about
Ignores solar unless he unplugs it from the wall, so he switched to the AC180.
Solar inputowner63 agreedsource →
His Delta 2 went bad three months after purchase and EcoFlow agreed it was defective.
Durabilityownerafter 3 months236 agreedsource →
Past 30 days the five-year warranty only gets a refurbished unit covered for 30 days.
Warranty & supportowner236 agreedsource →
What owners praise
DELTA 2 plus extra battery and 600W solar cost ~$1200 and paid for itself in under 2 years in California.
Price & valuemeasuredowner736 agreedsource →
Batteries still hold 98%+ capacity, ahead of the 80%-at-10-years warranty curve.
Durabilitymeasuredowner736 agreedsource →
Gets 180-190W into it from a 100Ah LiFePO4 via XT60i cable, no converter needed.
Chargingmeasuredowner106 agreedsource →
Jackery Explorer 300
29 claims from 22 comments · 20 from owners · 6 with figures
- Runtime
- 9 · 36% negative
- Solar input
- 3 · 0% negative
- Price & value
- 5 · 94% negative
- Durability
- 3 · 8% negative
- Other
- 3 · 53% negative
What owners complain about
Plans to return the day-old Jackery 300 after seeing the EB3A review.
Price & valueowner8 agreedsource →
Metered 235Wh delivered against an advertised 288Wh, about 80% usable.
Runtimemeasuredowner1 agreedsource →
Returning the Jackery 300 bought to run a compressor fridge and ordered an EB3A.
Otherowner2 agreedsource →
What owners praise
Fully charges in 3 hours from a 100W panel in full sunshine.
Solar inputmeasuredowner43 agreedsource →
Has been great for about 3 years and performs better than the budget rival tested in the video.
Durabilitymeasuredownerafter 36 months6 agreedsource →
Enough to run a lamp and a few small items where there is no grid wiring.
Runtimeowner43 agreedsource →
Claims are weighted by how specific they are, whether the commenter owns the unit, and how many readers agreed. Comments that mention a product under a rival's review count for more, because the commenter had no reason to be there. This is what buyers report, not our test results — for measurements we ran ourselves, see the methodology.
The Bottom Line
The full picture comes down to this. The DELTA 2 edges ahead on our overall analysis, but the margin is narrow enough that your specific use case should drive the decision. Review the scenario verdicts above — if the Explorer 300 wins in the scenarios that match your life, it's the right choice regardless of aggregate scores.
If neither the DELTA 2 nor the Explorer 300 feels like the right fit, your power needs probably sit outside what these two target. If you're planning whole-home backup or running power-hungry appliances (electric heaters, window AC), you'll want a larger system in the 3,000–5,000Wh range with expansion battery support. Prices on portable power stations fluctuate frequently. Both EcoFlow and Jackery discount regularly, so check the current price before committing. Prime Day and Black Friday pricing typically drops 20-30%.
Frequently Asked Questions
Answers drawn from the spec record and cited owner research.
Is the DELTA 2 worth $240 more than the Explorer 300?
The short answer: yes, if you'll actually use the extra capability. The DELTA 2 costs $240 more, but that premium buys you 731Wh more battery capacity (that's 4 extra hours of running a mini-fridge); 1,500W higher AC output (opening the door to more demanding appliances); a longer-lasting battery rated for 3,000 cycles — that's 8 years at daily use; 400W faster solar charging for quicker off-grid recovery. On a cost-per-watt-hour basis, you're paying $0.49/Wh vs $0.88/Wh. Factor in cycle life and the math flips: the DELTA 2 costs $0.16/kWh over its lifetime vs $1.10/kWh. The "expensive" unit is actually cheaper to own. For regular use, we'd pay the premium.
How does the 731Wh capacity difference actually affect daily use?
The DELTA 2's 1,024Wh battery keeps a mini-fridge running for roughly 6 hours vs the Explorer 300's 2 hours. What specs don't mention: runtime drops 20-30% in cold weather (below 32°F/0°C) as battery chemistry slows down. The DELTA 2's extra capacity provides a critical cold-weather buffer. For occasional phone and laptop charging, both are overkill. This gap only matters for sustained, multi-appliance use.
Can I actually carry the DELTA 2, or is the Explorer 300 the only portable option?
The Explorer 300 at 7.1 lbs is genuinely grab-and-go. Toss it in a backpack, carry it one-handed to a picnic, take it on a boat. The DELTA 2 at 27 lbs is a different story. It's like carrying a large suitcase full of books. If you're setting up and breaking down camp frequently, this weight difference will exhaust you by day two.
How fast can each unit recharge from solar panels in real conditions?
On paper, the DELTA 2 accepts 500W vs the Explorer 300's 100W of solar input. What the spec sheet won't tell you: solar panels typically deliver only 60-80% of their rated output due to panel angle, cloud cover, and temperature. In realistic conditions, expect full recharge in about 2.9 hours for the DELTA 2 and 4.2 hours for the Explorer 300. That gap widens on cloudy days, when the DELTA 2's higher input ceiling captures more of whatever sunlight is available. One more thing: summer gives you ~7 productive solar hours per day. Winter drops to ~4. If solar is your primary recharge method, the DELTA 2's advantage is substantial.
"3,000 vs 800 cycles" — what does that actually mean for me?
In real years: the DELTA 2 (3,000 cycles) lasts 8.2 years at daily use, 29 years at weekend use (twice a week), or 125 years at twice-monthly camping trips. The Explorer 300 (800 cycles): 2.2 years daily, 8 years weekends, or 33 years twice-monthly. What most people miss: hitting the cycle limit doesn't kill your battery. Capacity drops to about 80%. Your 1,024Wh unit becomes a ~819Wh unit. Still very usable. For weekend users, both batteries will outlast the warranty by years.
Can I use the DELTA 2 as a home UPS to protect my electronics during blackouts?
Yes. The DELTA 2 has UPS mode with true 0ms switchover (double-conversion). Even hospital-grade equipment won't notice. Plug in your desktop PC, router, NAS, or CPAP machine and it switches to battery seamlessly when the grid drops. The Explorer 300 does not have this feature. Without UPS, a blackout means: your PC reboots (potentially corrupting unsaved work), your NAS may corrupt its drive array, your CPAP alarms and wakes you up, and your security cameras go dark until you manually switch them over. If always-on power protection matters, this is a dealbreaker advantage for the DELTA 2.
What if I need more capacity than the Explorer 300's 293Wh later?
The Explorer 300 is sealed at 293Wh, so if you expect your needs to climb, the DELTA 2 is the more future-proof pick: it starts at 1,024Wh and adds EcoFlow-compatible batteries without replacing the base unit. That said, "not expandable" isn't a flaw on its own — if 293Wh comfortably covers your loads, the Explorer 300 is a complete unit, not a downgrade.
Is EcoFlow or Jackery more reliable for long-term ownership?
Both brands have strengths and trade-offs. EcoFlow: Mixed. 2-5 years depending on model (DELTA Pro Ultra line gets 10 years). Some users report smooth claims; others report runarounds. Register your product to extend coverage. Jackery: 2-5 years depending on model (premium models like 5000 Plus get 5 years, budget models get 2 years). Registration required for extension. Claims process can be frustrating. One piece of advice from the power station community: regardless of brand, buy from Costco or Amazon. Their return policies provide a safety net that manufacturer warranties alone can't match, especially for a product you'll rely on in emergencies. Both brands use LFP (lithium iron phosphate) batteries in their current lineup, the most proven chemistry for longevity and safety.
Bottom line: should I buy the DELTA 2 or the Explorer 300?
We'd pay the premium for the DELTA 2. Yes, it costs more. The capability jump is real: you're stepping into a tier that handles appliances the base model can't start. The Explorer 300 is still solid if budget is the priority, but the DELTA 2 will leave you less likely to wish you'd "gone bigger" six months from now. That regret costs more than the price difference.
Brand matchup
EcoFlow vs Jackery: measured across every matchup →Where to buy
EcoFlow DELTA 2Pick
$499.00
$499.00 · direct from EcoFlow
Last checked 58 days ago. Prices move — check before you buy.
Jackery Explorer 300
$289.00
$289.00 · direct from Jackery
Last checked 1 day ago. Prices move — check before you buy.
Prices may vary by retailer and are subject to change.