Head-to-head test
EcoFlow DELTA 3 Classic vs DJI Power 500
Doubling the battery costs $170 here, which is how the cheaper box on the shelf ends up being the expensive one per watt-hour.
Full profiles: EcoFlow DELTA 3 Classic → · DJI Power 500 →
Written by Ian SchneiderUpdated
Solar & Off-Grid Tester, Station Arena Test Desk
$559.00 · direct from EcoFlow
Last checked 1 day ago. Prices move — check before you buy.
$299.00 · direct from DJI
Last checked 1 day ago. Prices move — check before you buy.
Spec deltas
The second 512 watt-hours cost $170. The DELTA 3 Classic is $469 for 1,024Wh; the DJI Power 500 is $299 for 512Wh. Buying up doubles the battery for about eighteen cents a watt-hour ($170 ÷ 512Wh), which is less than a quarter of the rate the Power 500 charges for its own capacity ($299 ÷ 512Wh, or roughly seventy-four cents).
The Power 500 isn't a cheap DELTA, and that's the thing most head-to-heads get wrong about it. DJI arrived in this category in 2024 from the drone business, and the box optimizes for field-kit priorities: 16.1 lbs, a published 25dB, LFP cells rated for 4,000 cycles, and SDC ports that push charge straight into DJI batteries. Those are good priorities. They are not the priorities of someone buying their first outage battery.
So take the DELTA 3 Classic unless you fly DJI or the weight decides the trip. Its real weakness isn't hiding either: the 500W solar ceiling was flagged as low for a 2026 unit by two separate review outletsA5A9, and hands-on testing measured about 17W of idle drawA2, so this isn't a box you leave switched on in a closet waiting for a storm.
What the Numbers Reveal
Each conclusion stated first — the numbers behind it on one line, the full analysis below.
rated cycles
That gap doesn't decay over the life of the pack, it widens: 3,000 cycles at 1,024Wh is 3,072 kWh delivered before the DELTA reaches its rating, against 2,048 kWh from 4,000 cycles at 512Wh. The unit with the bigger sticker is the cheaper one per watt-hour on the day you buy it and the cheaper one per kilowatt-hour on the day you retire it.
DELTA 3 Classic: $469 for 1,024WhDJI Power 500: $299 for 512WhDELTA rated 3,000 cycles at 1,024Wh; Power 500 rated 4,000 cycles at 512Wh
Why it mattersAnyone choosing between these on the shelf price is reading the single number that points the wrong way.
continuous output
Motor loads are the entire reason surge headroom exists, and the DELTA has both the paper margin and a reviewer who watched it start an air conditionerA10. Buying the Power 500 for the same job means betting it repeats an out-of-spec result someone else got once, on the morning your fridge is the thing that matters.
DELTA 3 Classic: 1,800W continuous, 3,600W surgePower 500: 1,000W continuous and a 1,000W surge ceiling, so no published headroom above its own ratingOne reviewer ran the Power 500 at a 905W load and saw it briefly take 1,500WB3A review of the DELTA found its 1,800W inverter started a small window AC without trouble, though runtime was shortA10
Why it mattersIf anything on your list has a compressor or a motor in it, that settles this by itself.
solar input
And the ceiling you're paying extra to reach is the lower one: 300W against 500W, on a cap two outlets already called stingy for a 2026 unitA5A9. In ideal sun the DELTA takes on 1,024Wh in a bit over two hours (1,024 ÷ 500) while the Power 500 needs about an hour and three quarters for half that (512 ÷ 300). Slower per watt-hour, and gated behind a part.
The Power 500 has no built-in solar charge controller and needs a separate proprietary adapterOne review noted it ships with only a wall plug, no solar adapter and no car-charging cableB4Power 500 solar input tops out at 300W; the DELTA 3 Classic accepts 500WTwo outlets flagged the DELTA's 500W cap as low for a 2026 releaseA5A9
Why it mattersSolar-first buyers should add the price of DJI's adapter to the Power 500 before comparing anything.
So the useful question isn't which one gets you through the night, it's how far into the night you get, and the answer is the same 2× that shows up in every other row. The remote workday is the exception worth knowing: 910Wh asked against 870Wh usable is a 40Wh miss the DELTA closes by switching one thing off, while the Power 500 is 475Wh short, more than its entire usable capacity over again.
Four of the six modelled scenarios end with neither unit finishingUsable energy runs about 85% of nameplate: 870Wh for the DELTA, 435Wh for the Power 500The eight-hour blackout list is modelled at 1,645Wh; van life daily at 4,685Wh
Why it mattersIf a real outage is why you're shopping, buy the one that gets twice as far or move up a size class, but don't split the difference.
The specific dimensions that decide these two units — everything else is a tie.
Lifetime Value
Selected because: $469 for 1,024Wh against $299 for 512Wh is the decision, and this is where that $170 gets priced per watt-hour and per lifetime kWh.
Fifteen cents a kilowatt-hour against nineteen, and the cheaper figure belongs to the more expensive box. That inversion is the most useful thing on this page, because the spec row that appears to argue the opposite, 4,000 cycles against 3,000, is the same arithmetic read from the wrong end.
A cycle is only worth what it carries. The Power 500 buys its extra three calendar years by moving half as much energy each time, so if your daily draw genuinely sits under 512Wh, the 11 years against 8.2 is honest and the DJI will outlast the EcoFlow. If it doesn't, the Power 500 can't finish your day on one cycle at all, and the years quietly stop meaning what they looked like they meant.
Your Life, Your Pick
Selected because: Four of the six modelled loads end with neither unit covering them, which is worth knowing before arguing about the other two.
Four 'neither' verdicts out of six should change what you think you're shopping for. Weekend camping wants 2,100Wh and van life wants 4,685Wh; the largest usable pool anywhere on this page is 870Wh. No amount of comparing these two turns one of them into that unit.
They separate in the middle of the range. The tailgate list at 670Wh is a clean finish for the DELTA and a 235Wh shortfall for the Power 500; the remote workday at 910Wh is a 40Wh miss for the DELTA and nowhere near for the DJI. Between roughly 435Wh and 870Wh of demand is exactly where the extra $170 stops being theoretical and starts being the evening working out.
What the Specs Don't Tell You
Selected because: Surge headroom, expansion and the warranty card are where this pair's spec sheet is easiest to misread.
rated cycles
Read the warranty card, then set it aside. Both units carry five years, so the terms are identical; the '1.2× more coverage per dollar' underneath is $469 ÷ $299 wearing a different label, and dividing the same warranty by a smaller price will always produce that answer. Whatever separates these two brands on service, it isn't the length of the coverage.
The surge card earns its space. The Power 500's surge ceiling and its continuous rating are both 1,000W, which means nothing on paper is held back to absorb a motor starting, while the DELTA's 3,600W sits over an 1,800W continuous rating. The expansion card cuts less deeply than it looks: an EcoFlow expansion battery is a second purchase on another day, so if 1,024Wh already covers your list, the Power 500 being sealed at 512Wh isn't a defect. It's just a smaller box that told you its ceiling up front.
Portability & Form Factor
Selected because: 16.1 lbs against 26.7 lbs is the one axis where the Power 500 wins outright.
weight
16.1 lbs is a one-hand carry over a tailgate or up three flights, and it's the Power 500's best argument. 26.7 lbs is not that. It's two hands and a considered set-down, though one reviewer found the DELTA's handle solid and well centredA11 and another noted it lands noticeably lighter than the DELTA 2 it followsA8.
Be honest about what the lighter box gives up to be light: half the battery. If the trip fits inside 435Wh of usable energy, the DJI is the better object to own and carry. If you'd end up bringing a second power source to cover the gap, you've spent the weight you saved and then some.
Strengths & trade-offs
EcoFlow DELTA 3 Classic
Strengths
- +Larger battery capacity
- +Higher AC output
- +Faster solar charging
Trade-offs
- –Substantially more expensive (+$170) than the Power 500.
- –Significantly heavier (+10.6 lbs), making it harder to move.
- –Shorter-lived battery — rated for 3,000 charge cycles vs the Power 500's 4,000, so it wears out sooner.
DJI Power 500
Strengths
- +Costs $170 less
- +Lighter by 10.6 lb
- +Rated for 4,000 charge cycles — much longer battery lifespan
Trade-offs
- –Weaker inverter (-800W) limits appliance compatibility.
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 covers this scenario's 2,100Wh: the DELTA 3 Classic comes up 1,230Wh short (about 41% covered), the Power 500 1,665Wh (21%). 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 3 Classic comes up 775Wh short (about 53% covered), the Power 500 1,210Wh (26%). Treat this as partial cover — enough for the essentials in it, not the whole list.
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
Power 500
Both cover the night without noticing: about 40W for eight hours is 320Wh, against 435Wh usable in the Power 500 and 870Wh in the DELTA 3 Classic. Capacity isn't deciding this one. What decides it is that a CPAP is the rare load that cycles the battery every single night, and the Power 500 is rated for 4,000 cycles to the DELTA's 3,000, about 11 years of that routine against 8.2. It's also the cheaper and lighter box for a job neither will strain at. The one boundary to know: 435Wh usable is one night and a third, so multi-night outage prep is the thing 512Wh doesn't buy you.
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
Forty watt-hours. That's the entire margin the DELTA 3 Classic misses this by, 910Wh asked against 870Wh usable, and it's the kind of gap you close by letting the laptop finish on its own battery for the last half hour. Neither unit technically completes the day, but only one of them is arguing about the last twenty minutes. The Power 500 is 475Wh short, which is more than its whole usable capacity over again.
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 3 Classic
The Power 500 stops about two-thirds of the way in. This one asks 670Wh and the DJI has 435Wh usable, so it's 235Wh short and the music dies before the parking lot does. The DELTA 3 Classic finishes with 200Wh still in reserve, which is the margin that lets somebody plug in one more thing without anyone doing mental arithmetic first.
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 3 Classic comes up 3,815Wh short (about 19% covered), the Power 500 4,250Wh (9%). 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
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 3 Classic runs 4.2h vs 2.1h.
$469 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
August 9, 2026
Verdict: the DELTA 3 Classic, on Power Score margin
Buy the DELTA 3 Classic. It holds 1,024Wh at $469 against the Power 500's 512Wh at $299, so the extra capacity prices out at roughly eighteen cents a watt-hour ($170 ÷ 512Wh) while the DJI charges about seventy-four cents for the capacity it does have ($299 ÷ 512Wh), and the EcoFlow stays ahead to the end of the rated life at $0.15 per lifetime kWh against $0.19. It also carries the inverter headroom the DJI doesn't: 3,600W of surge over an 1,800W continuous rating, where the Power 500's surge ceiling and its continuous rating are the same 1,000W. There are exactly two situations where the Power 500 is the right buy, and price isn't either of them: you own DJI gear and want the SDC ports, or the difference between a 16.1 lb box and a 26.7 lb one decides whether it comes along at all.
Editor-assigned confidence, based on cited owner research and spec analysis.
List prices as of August 9, 2026. The links below open EcoFlow's and DJI's current prices.
$559.00 · direct from EcoFlow
Last checked 1 day ago. Prices move — check before you buy.
or check the Power 500 price$299.00 list
Written by Ian Schneider, Solar & Off-Grid Tester · Station Arena Test Desk · Updated August 9, 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, Home Backup, 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 3 Classic rates 4.5/5 (73rd percentile of 27 Everyday-class units), and Power 500 rates 4.6/5 (74th percentile of 20 Compact-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.
Surge: 3,600W Over 1,800W vs 1,000W Over 1,000W
The Power 500's surge ceiling and its continuous rating are the same figure: 1,000W. That's the spec that matters for anything with a motor, because startup draw arrives all at once and there's nothing published above the rating to absorb it. The DELTA 3 Classic lists 3,600W of surge over 1,800W continuous. For kettles, laptops and lights the difference never once appears. For a fridge or a compressor it's the whole question.
10ms vs 20ms: A Difference You'll Read About and Never Feel
Ten milliseconds against twenty, and both sit inside the window that keeps a desktop, a router or a NAS alive through a cut. The DELTA's switch is the faster one and the label is accurate, but neither unit is going to drop your equipment. Let this one be a footnote rather than a tiebreak.
Warranty: Identical, Five Years Each
Both units carry a five-year warranty, so there is nothing here to compare. The '1.2× more coverage per dollar' is $469 divided by $299, the price gap in a warranty costume. Dividing the same five years by a smaller number will always favour the smaller number.
Battery Lifespan in Real Years
The Power 500 is rated for 4,000 cycles vs 3,000. In real life: at daily use, that's 11 vs 8.2 years. At weekend use (twice a week), it's 38 vs 29 years. One caution reading years across different sizes: a cycle is 512Wh on the Power 500 and 1,024Wh on the DELTA 3 Classic, so count lifetime energy — roughly 2,048 kWh against 3,072 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 3 Classic.
Check DELTA 3 Classic price →or check the Power 500 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
Both units cost the same to own over their rated lives — $0.15/kWh each. Lifetime cost can't separate them, so decide on the sticker price and everything else. One caution on the lifespan row: the Power 500 takes longer to reach its cycle rating, but a cycle moves a different amount of energy on each unit — the DELTA 3 Classic still delivers more over its shorter horizon (3,072 vs 2,048 kWh). Years measure wear, not usefulness.
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.
DJI
Ecosystem
New entrant (2024) — five power station models to date: Power 500, Power 1000 (since superseded by the V2 but still sold), Power 1000 V2, Power 1000 Mini, Power 2000. Buying a "Power 1000" listing? Check which revision it actually ships.
Support
Leveraging DJI's established global support and repair center network from the drone business. Generally positive reputation inherited from drone operations, but limited power-station-specific track record.
Community
No dedicated power station community yet. Discussions happen within r/dji (~250K members, mostly drone users). Very small power-specific presence on Facebook and forums.
App experience
Rated 3.5/5 iOS and Android (DJI Home app ratings reflect entire DJI ecosystem including drones/cameras, not power-station-specific). Users report the on-device screen is more reliable than the app.
Unique strength
Years of building flight packs show up here as a 16.1 lb box rated for 4,000 cycles with SDC ports that charge DJI batteries directly. If you fly, that port is the argument for this unit. If you don't, it's a socket you'll never plug into, and you're buying a 512Wh station on its other merits.
Worth knowing
DJI has been making power stations since 2024 and the line runs to four models with real differences between them, which matters when you're reading around. Battery expansion belongs to the newer Power 2000 and Power 1000 V2, not to this one, and the headline wall-charging times you'll see quoted for the line are the V2's rather than the Power 500's. This is the small field battery in the range, sealed at 512Wh.
Analyst note
EcoFlow has the deepest catalogue in portable power, a 31,000-member subreddit, and a support record that swings both ways. DJI brings a global repair network built for cameras and drones and almost no power-station history to judge it against. Neither of those settles a $469-versus-$299 decision, and both units carry five years of warranty, so treat the brand column here as context rather than a tiebreak.
Growth path
DELTA 3 Classic
FIXED CAPACITYFixed at 1,024Wh, with no expansion — so size it for your needs up front rather than planning to add capacity later.
Accepts up to 500W of solar. Suitable for a 1-2 panel setup.
Generous port selection supports complex multi-device setups.
Power 500
FIXED CAPACITYFixed at 512Wh, with no expansion — so size it for your needs up front rather than planning to add capacity later.
Accepts up to 300W of solar. Limited to a single portable panel.
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
Neither expands, and that's no knock on either — each is a complete unit at a fixed size. Buy the capacity that covers your needs now (the DELTA 3 Classic gives you the larger ceiling); you can't add to either later.
What Owners Report
Patterns from published owner reports and long-term reviews — every claim cited to its source below.
EcoFlow DELTA 3 Classic
The DELTA 3 Classic is new enough that nearly everything on record comes from review outlets rather than long-term ownersA1A5A9. Hands-on testing has it going from empty to full at a wall outlet in just under 55 minutesA1 and drawing about 17W at idleA2, and that second figure is worth the arithmetic: 870Wh of usable capacity divided by 17W is roughly 51 hours, so leaving it switched on in a closet is not a storage strategy. Reviewers welcomed the return to a front-facing port layoutA4, rate the app among the best in the categoryA6, and single out the Storm Guard auto-charge feature as genuinely usefulA12.
Two outlets independently flagged the 500W solar ceiling as the unit's real limitationA5A9. One buyer reports running two of them with an expansion battery on oneA13, which is at least evidence the growth path gets exercised. Treat retailer star ratings for this SKU carefully, though: the same review page carries a complaint from someone who ordered a 1,024Wh DELTA 2 and received a 950Wh unit insteadA15, so some of that feedback is about a different product entirely.
“In our tests, the DELTA 3 Classic charged from empty to full plugged into a standard wall outlet in just shy of 55 minutes.”
Sources
thesolarlab.com · vantour.net · smartenergyedge.com · walmart.com
DJI Power 500
Field data on the Power 500 is thin. Four entries, all from review outlets, no long-term owner reports at allB1B2B3B4. What exists is consistent: about 7.3 kg and easy to moveB2, and strong real-world electrical behaviour, including a sustained 905W load and a brief 1,500W spike above its own 1,000W rating, with one reviewer finding it more efficient than DJI's larger Power 1000B3.
The repeated caveat is what's in the box. It ships with a wall plug and nothing else, no solar adapter and no car-charging cableB4. One more thing for anyone buying on longevity: the same source that praises the cells describes them as rated for 3,000 to 4,000 cyclesB1, where the spec sheet here carries the 4,000 figure. Treat 4,000 as the top of a range rather than a promise.
“A 512Wh LFP battery with up to 1,000W output; the automotive-grade LFP cells are rated up to 3,000-4,000 cycles for roughly a 10-year lifespan.”
Sources
dji.com · thesolarlab.com · techradar.com · views-sounds.com · t3.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
- Multiple independent reviewers note the unit is quieter than expected for its price point, with low idle drain. [DELTA 3 Classic · 2 entries]
- The 500W solar input cap is flagged as a limiting factor by more than one review outlet, seen as low for a 2026-era release. [DELTA 3 Classic · 2 entries]
- Reviewers praise the app and Storm Guard/smart features as standout software elements. [DELTA 3 Classic · 2 entries]
- Light, efficient LFP unit with strong real-world output and drone-pilot appeal; the caveat is minimal included accessories. [Power 500 · 3 entries]
- A1
“In our tests, the DELTA 3 Classic charged from empty to full plugged into a standard wall outlet in just shy of 55 minutes.”
thesolarlab.com — EcoFlow DELTA 3 Classic Review: Cheap, Quiet & Useful? · unknown (post-launch 2026) · [positive]
- A2
“We measured the idle draw to be roughly 17W per hour.”
thesolarlab.com — EcoFlow DELTA 3 Classic Review: Cheap, Quiet & Useful? · unknown (post-launch 2026) · [positive]
- A4
“EcoFlow moved back to a more sensible front-facing layout: AC outlets and USB ports on the front, charging inputs on the back”
thesolarlab.com — EcoFlow DELTA 3 Classic Review: Cheap, Quiet & Useful? · unknown (post-launch 2026) · [positive]
- A5
“the screen only showed 500 W input”
vantour.net — EcoFlow Delta 3 Classic: Our review, test and promo code · 3 weeks ago (~June 2026) · [negative]
- A6
“it is clearly one of the best-designed apps on the market”
vantour.net — EcoFlow Delta 3 Classic: Our review, test and promo code · 3 weeks ago (~June 2026) · [positive]
- A8
“It also seems noticeably lighter than the EcoFlow DELTA 2 that we currently have in the motorhome.”
vantour.net — EcoFlow Delta 3 Classic: Our review, test and promo code · 3 weeks ago (~June 2026) · [positive]
- A9
“EcoFlow pushes the fast charging hard, but the DELTA 3 Classic is capped at 500W solar input”
smartenergyedge.com — EcoFlow DELTA 3 Classic Review: Better Than the DELTA 2? · 1 week ago (~July 2026) · [negative]
- A10
“The 1,800W inverter handles the startup surge of a small window AC unit just fine, but the runtime is short.”
smartenergyedge.com — EcoFlow DELTA 3 Classic Review: Better Than the DELTA 2? · 1 week ago (~July 2026) · [mixed]
- A11
“The handle is solid and centered well.”
smartenergyedge.com — EcoFlow DELTA 3 Classic Review: Better Than the DELTA 2? · 1 week ago (~July 2026) · [positive]
- A12
“The Storm Guard auto-charge feature is smart and genuinely useful.”
smartenergyedge.com — EcoFlow DELTA 3 Classic Review: Better Than the DELTA 2? · 1 week ago (~July 2026) · [positive]
- A13
“I have two of these units now and an extra battery for one of them for more runtime.”
walmart.com — Customer reviews for EF EcoFlow DELTA 3 Classical 1000 · unknown · [positive]
- A15
“I pay for an Ecoflow delta 2 1024wh but I receive something totally different. An Ecoflow 950 wh that doesn't fit my expertise or what I need.”
walmart.com — Customer reviews for EF EcoFlow DELTA 3 Classical 1000 · unknown · [negative]
- B1
“A 512Wh LFP battery with up to 1,000W output; the automotive-grade LFP cells are rated up to 3,000-4,000 cycles for roughly a 10-year lifespan.”
dji.com / thesolarlab.com — Power 500 review · 2026 · [positive]
- B2
“Weighs only about 7.3 kg, making it easy to transport.”
dji.com / techradar.com — Power 500 review · 2026 · [positive]
- B3
“In testing it ran a 905W load and briefly handled a 1,500W surge above its 1,000W rating; reviewers found it outperformed the larger DJI Power 1000 in efficiency testing.”
thesolarlab.com / views-sounds.com — Power 500 review · 2026 · [positive]
- B4
“Reviews are positive overall, though one noted it ships with only a wall plug — no solar adapters or car-charging cables included.”
t3.com / techradar.com — Power 500 review · 2026 · [mixed]
Research compiled August 9, 2026.
Who Should Buy Which
Buy the DELTA 3 Classic if you…
- →Anything on your list has a motor or a compressor: a fridge, a sump pump, a circular saw. 3,600W of surge over an 1,800W continuous rating is the margin that gets those spinning; 1,000W over 1,000W is not.
- →You want the outage box to cover more than one evening. 870Wh usable is roughly half the 1,645Wh eight-hour blackout list, and the Power 500's 435Wh is roughly a quarter of it.
- →You're going to put it on panels. 500W of input and a built-in charge controller means you buy a panel and a cable, not a panel and a proprietary adapter.
- →You'd rather have room to grow than a fixed ceiling. The DELTA takes EcoFlow expansion batteries; the Power 500 is sealed at 512Wh for life.
Buy the Power 500 if you…
- →You fly DJI. The SDC ports charge DJI batteries directly, and that's a feature the EcoFlow can't answer at any price.
- →The weight decides whether it comes at all. 16.1 lbs goes up three flights or over a tailgate one-handed; 26.7 lbs is a different kind of trip and you already know which one you take.
- →Your load is a CPAP, a phone, and nothing else. 320Wh a night against 435Wh usable leaves 115Wh in hand, and 4,000 cycles is about 11 years of that nightly routine.
If neither fits
If the reason you're shopping is a genuine outage, the fridge and the furnace fan and the lights until morning, close both tabs. That list is modelled at 1,645Wh here and the larger of these two holds 870Wh usable. Buy once in the 2,000Wh class instead of buying 512Wh twice.
The Bottom Line
Take the DELTA 3 Classic. Doubling the battery costs $170 on this page, about eighteen cents a watt-hour, when the Power 500 charges roughly seventy-four cents for the capacity it already has, and the advantage survives all the way to the end of the rated life. Add the inverter headroom, 3,600W of surge over 1,800W continuous against a unit whose surge ceiling is its continuous rating, and there's no motor load anywhere on a normal list where the DJI is the safer bet.
The two reasons to buy the Power 500 instead are both real, and neither is price. If you fly DJI, the SDC ports are a feature the EcoFlow cannot answer. And if 16.1 lbs against 26.7 is the difference between the trip happening and the unit staying home, buy the light one and size your day to 435Wh. Everyone else is paying $299 for half a battery to avoid paying $469 for a whole one.
Frequently Asked Questions
Answers drawn from the spec record and cited owner research.
Is the DJI Power 500 worth it if I don't own a drone?
Mostly no. Take the SDC ports out of the picture and you're paying $299 for 512Wh against $469 for 1,024Wh, which works out to about seventy-four cents a watt-hour for the DJI and forty-six for the EcoFlow ($299 ÷ 512 and $469 ÷ 1,024). The exception is weight: at 16.1 lbs against 26.7, the Power 500 is much the easier box to move. If that isn't your constraint, the DELTA is the better buy.
Can either of these run a fridge through a power outage?
Start one, probably. Run it all night, no. The DELTA publishes 3,600W of surge over an 1,800W continuous rating, which is the headroom a compressor's startup wants, while the Power 500's surge ceiling is the same 1,000W as its continuous rating. On capacity, the eight-hour blackout scenario here is modelled at 1,645Wh and the DELTA's usable pool is 870Wh, so that's essentials-only, and the Power 500's 435Wh is half of essentials-only.
Which one is better for a CPAP?
The Power 500, narrowly, and only for the machine on its own. A CPAP at about 40W for eight hours is 320Wh, which the DJI's 435Wh of usable capacity covers with 115Wh to spare and the DELTA's 870Wh covers nearly three times over. What tips it is that a CPAP cycles the battery every single night, and the Power 500 is rated for 4,000 cycles against 3,000, roughly 11 years of that routine versus 8.2. Flip it if you're prepping for a multi-night outage rather than a nightly habit: 435Wh usable is one night and a third.
Does the DELTA 3 Classic's 500W solar input hold it back?
It's the most-criticised thing about the unit, with two review outlets calling the cap low for a 2026 release. In practice 1,024Wh at 500W is a bit over two hours of ideal sun (1,024 ÷ 500), which is fine for a weekend. It's also still the higher of the two here: the Power 500 accepts 300W, and it has no built-in charge controller, so you need DJI's proprietary adapter before a panel does anything at all.
The DJI is rated for more cycles. Doesn't that mean it lasts longer?
In calendar years yes, in energy no. 4,000 cycles at 512Wh is 2,048 kWh over the life of the pack, while 3,000 cycles at 1,024Wh is 3,072 kWh. The Power 500 stretches to about 11 years of daily use against the DELTA's 8.2 by moving half as much energy each night. If your daily need runs over 512Wh it can't finish a day on a single cycle, and the extra years stop meaning what they appear to mean.
Brand matchup
EcoFlow vs DJI: measured across every matchup →Where to buy
EcoFlow DELTA 3 ClassicPick
$559.00
$559.00 · direct from EcoFlow
Last checked 1 day ago. Prices move — check before you buy.
DJI Power 500
$299.00
$299.00 · direct from DJI
Last checked 1 day ago. Prices move — check before you buy.
Prices may vary by retailer and are subject to change.