Head-to-head test
EcoFlow DELTA 3 Classic vs EcoFlow RIVER 3 PLUS
The RIVER 3 Plus is a one-hand carry at 10.4 lbs. The DELTA 3 Classic is 26.7 lbs you set down and forget. That's the real decision here, not which EcoFlow badge looks better on paper.
Written by Wenny ZhengUpdated
Portable Power Tester, Station Arena Test Desk
EcoFlow
DELTA 3 Classic
3,341Power Score · Appliance Class
$469.00 list · direct from EcoFlow
EcoFlow
RIVER 3 PLUS
1,917Power Score · Device Hub
$259.00 list · direct from EcoFlow
Spec deltas
The DELTA 3 Classic and RIVER 3 Plus are both EcoFlow, both LiFePO4, and both backed by the same 5-year warranty. The entire decision comes down to 738Wh of capacity, and what carrying that extra battery costs in dollars and pounds.
At $469 for 1,024Wh against $259 for 286Wh, the RIVER 3 Plus looks like the value pick on price alone. Count what each watt-hour actually costs over the unit's life, though, and the RIVER runs twice as expensive per kWh delivered, not cheaper. The DELTA 3 Classic is also the only one of the two that clears a 320Wh CPAP night or a 670Wh tailgate run without coming up short.
None of that makes the RIVER 3 Plus the wrong buy. At 10.4 lbs, under half the DELTA's 26.7, it's built to be carried all day, not set down and left in one spot, and $259 is real money saved if the job is just keeping a phone, a laptop, and a camera battery topped off. This is a carry-it-versus-set-it-down decision as much as a spec fight.
What the Numbers Reveal
Each conclusion stated first — the numbers behind it on one line, the full analysis below.
cost / lifetime kWh
That's because the lower price buys a smaller battery, not a better rate. With 738Wh less capacity behind it, the RIVER's price tag looks good right up until you divide it by what it actually stores.
DELTA 3 Classic: $469 for 1,024Wh, $0.15 per lifetime kWh deliveredRIVER 3 Plus: $259 for 286Wh, $0.30 per lifetime kWh delivered
Why it mattersAnyone shopping on sticker price alone is optimizing the wrong number. Buyers who'll use close to a full 1,024Wh pay less per watt-hour with the pricier unit.
continuous output
Surge is what decides whether a compressor-driven load even starts. The RIVER's 1,200W ceiling rules out most fridges and window units before capacity ever enters the conversation, no matter how much runtime is left in the tank.
DELTA 3 Classic: 26.7 lbs, 1,800W continuous / 3,600W surgeRIVER 3 Plus: 10.4 lbs, 600W continuous / 1,200W surge
Why it mattersIf the job is starting something with a motor or a compressor, the DELTA's extra weight is the price of admission, not a downside to negotiate away.
The DELTA's margin isn't as comfortable as that scoreline suggests. Remote Workday alone needs 105% of its usable capacity, so the 'winner' of this matchup still comes up just short the moment the load passes roughly what a work-from-home day pulls.
CPAP Overnight (320Wh) and Tailgate Party (670Wh) are the only two of six scenarios either unit clears, and both go to the DELTA 3 ClassicThe other four scenarios need between 910Wh and 4,685Wh
Why it mattersWhichever unit ends up in the cart, anything bigger than the Tailgate Party load is a buy-a-bigger-unit problem, not a which-EcoFlow problem.
The unit with the higher cost-per-warranty-year is still the cheaper one to actually run: it costs half as much per lifetime kWh. Cost-per-warranted-year rewards the smaller battery for costing less, not for being better covered.
Both units carry a 5-year warranty and the same 3,000-cycle ratingDELTA 3 Classic costs $94 per warranted year against the RIVER 3 Plus's $52
Why it mattersIgnore cost-per-warranty-year when comparing these two. It's a proxy for purchase price wearing a durability costume; lifetime cost per kWh is the number that actually answers the question.
The specific dimensions that decide these two units — everything else is a tie.
Runtime: Will It Power Your Gear?
Selected because: Capacity and inverter/surge gap is the foundation everything else on the page builds from.
continuous output
1,024Wh plays 286Wh, and the inverter gap tracks right alongside it: 1,800W continuous and 3,600W surge on the DELTA 3 Classic against 600W and 1,200W on the RIVER 3 Plus, exactly three times the headroom on both counts. That surge number is the one that matters when something with a compressor kicks on. The RIVER's 1,200W ceiling rules out most fridges and window units before capacity even enters the conversation.
Those scenario percentages already bake in real-world loss: only about 85% of rated Wh is usable once the inverter takes its cut, so an 864% figure for the RIVER on Weekend Camping isn't exaggeration, it's what's left after physics. The DELTA doesn't clear the big scenarios either. It just clears more of the smaller ones.
Lifetime Value
Selected because: cheaperToOwn flips against sticker price — the pricier unit is the better $/kWh buy, the core value argument for this pair.
cost / lifetime kWh
$0.15 per lifetime kWh against $0.30 is the cleanest number on this page. The RIVER 3 Plus costs exactly twice as much for every watt-hour it delivers over its life, despite costing $210 less to buy, and that holds regardless of how either unit gets used, because it's built from cycles and capacity, not scenario assumptions.
Both units share the same 3,000-cycle rating, so the entire gap comes from how price scales against capacity: the DELTA costs roughly 1.8 times as much to buy but holds 3.6 times the energy. That ratio mismatch is the whole arithmetic behind the per-kWh number above.
Portability & Form Factor
Selected because: 26.7 lbs vs 10.4 lbs is the other half of the value trade and the honest reason to still pick the smaller unit.
weight
26.7 lbs versus 10.4 lbs is the difference between a unit you carry with bent knees and one you pick up one-handed on the way out the door: 2.6 times the weight, worn entirely on the DELTA 3 Classic's side of the ledger. Neither unit is heavy in an absolute sense. This is a portable-versus-more-portable argument, not portable-versus-generator.
What that weight buys is three times the continuous output, three times the surge headroom, and 738Wh more capacity, so the extra 16.3 lbs is the battery and inverter doing more work, not dead weight. Whether that trade is worth making comes down to whether the unit rides in a bag all day or sits on a shelf until the power goes out.
Your Life, Your Pick
Selected because: Concrete decision framework — only 2 of 6 scenarios are winnable at all, and DELTA takes both; RIVER wins none.
Two scenarios out of six are winnable at all, and the DELTA 3 Classic takes both: CPAP Overnight at 37% of usable capacity and Tailgate Party at 77%. The RIVER 3 Plus doesn't lose these so much as it was never in range, needing 132% and 276% of its usable capacity respectively.
The other four, Weekend Camping, 8-Hour Blackout, Remote Workday, and Van Life Daily, go to neither unit, DELTA included. Remote Workday is the closest miss at 105% of usable capacity; the rest aren't close. If one of those four is the actual use case, this matchup isn't the one to be reading.
Growth Path
Selected because: Both expand, but the solar ceiling (500W vs 200W) decides whether that growth path is usable off-grid.
solar input
Both units take EcoFlow's expansion batteries, so neither is a dead end on paper. In practice, the DELTA 3 Classic's 500W solar ceiling against the RIVER 3 Plus's 200W decides whether that growth path is usable off-grid or just a spec-sheet promise: 2.5 times the panel input means meaningfully faster refills any time there's no wall outlet nearby.
Adding a battery without the solar input to refill it just means a bigger box that takes longer to top off from the sun. If panels are part of the plan, the DELTA's ceiling is the more honest foundation to expand from.
Strengths & trade-offs
EcoFlow DELTA 3 Classic
Strengths
- +Larger battery capacity
- +Higher AC output
- +Faster solar charging
Trade-offs
- –Substantially more expensive (+$210) than the RIVER 3 PLUS.
- –Significantly heavier (+16.3 lbs), making it harder to move.
EcoFlow RIVER 3 PLUS
Strengths
- +Costs $210 less
- +Lighter by 16.3 lb
Trade-offs
- –Weaker inverter (-1,200W) 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
A weekend of camping draws around 2,100Wh: 241% of the DELTA 3 Classic's usable capacity and 864% of the RIVER 3 Plus's. Neither covers this alone; treat it as a job for a larger station or a multi-battery setup.
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
An 8-hour blackout runs about 1,645Wh, which is 189% of the DELTA 3 Classic's usable capacity and 677% of the RIVER 3 Plus's. Both units come up short here; this load calls for more capacity than either provides on its own.
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 3 Classic
A CPAP night needs roughly 320Wh. The DELTA 3 Classic covers it using just 37% of usable capacity, with plenty of headroom left over. The RIVER 3 Plus can't; 320Wh is 132% of what it holds.
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 remote workday runs about 910Wh, which comes to 105% of the DELTA 3 Classic's usable capacity and 374% of the RIVER 3 Plus's. Both fall just short, the DELTA by the narrowest margin of any scenario on this page.
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
A tailgate setup pulls around 670Wh: 77% of the DELTA 3 Classic's usable capacity, comfortably inside range. The RIVER 3 Plus would need 276% of what it holds, so this one's a clean win for the bigger unit.
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
Daily van life draws roughly 4,685Wh: 538% of the DELTA 3 Classic's usable capacity and 1,927% of the RIVER 3 Plus's. This is well beyond what either unit is built for; van life at this scale is a job for a vehicle-integrated system, not a portable station.
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
For this load: DELTA 3 Classic runs 4.2h vs 1.2h.
$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
July 28, 2026
Verdict: the DELTA 3 Classic, on Power Score margin
On cost per watt-hour delivered, and on every scenario either unit can actually cover, the DELTA 3 Classic wins. It costs half what the RIVER 3 Plus does per lifetime kWh, and it's the only one of the two that clears the CPAP Overnight and Tailgate Party loads outright. The RIVER 3 Plus isn't a worse product: at 10.4 lbs and $259, it's built for a lighter, cheaper job, which is why this reads as 'buy more capacity than you expect to need' rather than a clean sweep.
Editor-assigned confidence, based on cited owner research and spec analysis.
List prices as of July 28, 2026. The links below open EcoFlow's current price.
$469.00 list · direct from EcoFlow
or check the RIVER 3 PLUS price$259.00 list
Written by Wenny Zheng, Portable Power Tester · Station Arena Test Desk · Updated July 28, 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 4.9/5 (91st percentile of 24 Everyday-class units), and RIVER 3 PLUS rates 5.0/5 (99th 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.
Same Coverage, Different Math
Both units carry EcoFlow's 5-year warranty and the same 3,000-cycle LiFePO4 rating, so coverage length isn't what separates them. Priced out over that term, the DELTA 3 Classic runs $94 a year against the RIVER 3 Plus's $52, the bigger battery's higher price spread over an identical warranty period, not a sign either unit is built to last less.
Full record above — the Test Desk pick is the DELTA 3 Classic.
Check DELTA 3 Classic price →or check the RIVER 3 PLUS 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 RIVER 3 PLUS is cheaper to buy, but the DELTA 3 Classic is cheaper to own. At $0.15/kWh over its lifetime vs $0.3/kWh, the DELTA 3 Classic's higher cycle life and capacity make each dollar go further over the years.
Delivers each lifetime kWh for $0.15 less — check the DELTA 3 Classic price →
Growth path
DELTA 3 Classic
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.
RIVER 3 PLUS
EXPANDABLESupports EcoFlow expansion batteries, so you can add capacity later without replacing the base unit — useful if your needs may climb past 286Wh.
Accepts up to 200W of solar. Limited to a single portable panel.
Adequate ports for most setups, but heavy users may want a power strip.
Expansion batteries are EcoFlow-specific. You're investing in the EcoFlow ecosystem.
Realistic full solar rechargeat 70% of rated panel output — see methodology
Analyst note
Both expand, but the DELTA 3 Classic's higher solar ceiling (500W vs 200W) gives it the stronger off-grid growth path — more panels can feed a bigger bank as it grows.
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 only shipped in March 2026, so there's no real long-term ownership record yet. What exists is early hands-on testing, not months of field use. Reviewers who've run it agree on the fundamentals: it recharges quickly from a wall outlet and barely sips power sitting idleA1A2, and more than one expected louder cooling fans at this price and didn't get themA3. The front-facing outlet layout, AC and USB up front with charging ports around back, drew specific praise as the sensible layout EcoFlow skipped on earlier modelsA4.
It isn't uniformly glowing. More than one outlet calls the solar input ceiling stingy for a 2026 releaseA5A9, and one review flagged the app under-reporting solar input during a testA5. A few buyers also note the pack loses some charge just sitting in storage between usesA14. Weigh all of it as an early-adopter snapshot; there isn't yet a body of six-month-plus reports to say how the unit ages.
“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
EcoFlow RIVER 3 PLUS
Coverage on the RIVER 3 Plus is more settled. The doubled inverter and solar input over the base RIVER 3 is the headline upgrade reviewers point toB1, and it draws consistent praise for running remarkably quiet, quieter than a library by more than one accountB2. Reviewers describe it as genuinely grab-and-go, noting it can still briefly run a coffee maker, microwave, or space heater despite the small frameB3.
The 3,000-cycle LiFePO4 pack draws the same durability praise EcoFlow's lithium units generally get, with reviewers pegging that at roughly a decade of regular use before capacity meaningfully fadesB4. There's no negative pattern in the coverage found for this unit. The RIVER 3 Plus's reputation is about doing a small job well, not about complaints to weigh against it.
“286Wh base, expandable to 572Wh (EB300) or 858Wh (EB600), with a genuine 600W inverter (1,200W X-Boost) and 220W solar input — twice the inverter and solar of the base RIVER 3.”
Sources
ecoflow.com · bestgeneratorsolar.com · thepowerpick.com · storagereview.com · phonearena.com · greenreviewshub.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]
- Expandable capacity, doubled inverter and solar over the base RIVER 3, remarkable sub-30dB quiet, and light weight are the praise. [RIVER 3 PLUS · 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]
- A3
“we expected the cooling fans to break that trend given the price point for this unit”
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]
- 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]
- A14
“Loses about 5-10% charge per month when not in use.”
walmart.com — Customer reviews for EF EcoFlow DELTA 3 Classical 1000 (aggregated pros/cons summary) · unknown · [negative]
- B1
“286Wh base, expandable to 572Wh (EB300) or 858Wh (EB600), with a genuine 600W inverter (1,200W X-Boost) and 220W solar input — twice the inverter and solar of the base RIVER 3.”
ecoflow.com / bestgeneratorsolar.com — RIVER 3 Plus review · 2026 · [positive]
- B2
“Sub-30dB operation is genuinely remarkable — quieter than a library and than most refrigerators.”
thepowerpick.com — RIVER 3 Plus review · 2026 · [positive]
- B3
“Weighs about 10.4 lbs and is highly portable; a small-format station that grows with you, able to briefly run a coffee maker, microwave, or space heater.”
storagereview.com / phonearena.com — RIVER 3 Plus review · 2026 · [positive]
- B4
“LiFePO4 rated for 3,000 charge cycles — around 10 years of everyday use before capacity drops to 80%.”
greenreviewshub.com / bestgeneratorsolar.com — RIVER 3 Plus review · 2026 · [positive]
Research compiled July 28, 2026.
Who Should Buy Which
Buy the DELTA 3 Classic if you…
- →Buy the DELTA 3 Classic if you want one box that covers CPAP backup, a home-office outage, and weekend cookouts without a second purchase. It's the only one of these two that clears the 320Wh CPAP Overnight load and the 670Wh Tailgate Party load on its own.
- →It's also the pick if panels are in the future: 500W of solar input actually uses a real panel setup, and paying half as much per lifetime kWh means the extra $210 up front pays itself back the more you cycle it.
Buy the RIVER 3 PLUS if you…
- →Buy the RIVER 3 Plus if the job is charging phones, a laptop, or a camera kit and the whole unit needs to disappear into a bag. At 10.4 lbs it's a one-hand carry the DELTA 3 Classic never will be.
- →It also makes sense on a tighter budget: $259 gets the same 5-year warranty and the same 3,000-cycle LFP chemistry, just in a smaller, lighter package built for one person's daily gear, not a household's outage plan.
If neither fits
Skip both if your real number is bigger than 910Wh. An 8-hour blackout (1,645Wh) or a long weekend of camping (2,100Wh) needs more than the DELTA 3 Classic delivers alone, let alone the RIVER 3 Plus. Look at a higher-capacity station, or one built to stack multiple expansion batteries from the start.
The Bottom Line
The DELTA 3 Classic is the better buy when you'll actually use the capacity. It costs half as much per lifetime kWh, and it's the only one of the two that clears the two scenarios either unit can cover at all, CPAP Overnight and Tailgate Party. That's not a knock on the RIVER 3 Plus; at 10.4 lbs and $259, it's doing a different job.
Buy the DELTA 3 Classic to cover a household's real outages and cookouts for less per watt-hour. Buy the RIVER 3 Plus when the whole point is that it disappears into a bag. Buy neither if your number is north of 910Wh; that's a bigger unit's job.
Frequently Asked Questions
Answers drawn from the spec record and cited owner research.
Is the EcoFlow DELTA 3 Classic worth $210 more than the RIVER 3 Plus?
If you'll actually use close to its 1,024Wh capacity, yes. The DELTA 3 Classic costs half as much per lifetime kWh delivered, so the bigger unit is the cheaper one per watt-hour even though it costs more at checkout. If you only ever need a few hundred watt-hours at a time, that math doesn't help you, and the RIVER's lower sticker price is the more honest number to look at.
Can the EcoFlow RIVER 3 Plus power a CPAP all night?
Not comfortably. A CPAP Overnight load runs about 320Wh, which is 132% of what the RIVER 3 Plus can deliver, so it comes up short. The DELTA 3 Classic uses only 37% of its capacity for the same night, with plenty of room to spare.
Do the DELTA 3 Classic and RIVER 3 Plus have the same warranty?
Yes, both carry a 5-year warranty. Where they differ is cost per warranted year: $94 for the DELTA 3 Classic versus $52 for the RIVER 3 Plus, which is really just the bigger battery's higher price spread over the same five years, not a sign either warranty is worth less.
Which is easier to carry, the DELTA 3 Classic or the RIVER 3 Plus?
The RIVER 3 Plus, by a wide margin. At 10.4 lbs it's a one-hand carry you barely notice in a bag. The DELTA 3 Classic's 26.7 lbs is a two-hand lift you set down and leave in one spot, and that extra weight is buying three times the inverter output, not just bulk.
Can I add solar panels or expansion batteries to either one?
Both support EcoFlow expansion batteries, so neither is a dead end if you outgrow it. They're not equal on solar, though: the DELTA 3 Classic accepts up to 500W of panel input against the RIVER 3 Plus's 200W, so it refills faster off-grid and makes more sense if panels are part of a future plan.
Where to buy
EcoFlow DELTA 3 ClassicPick
$469.00
$469.00 list · direct from EcoFlow
EcoFlow RIVER 3 PLUS
$259.00
$259.00 list · direct from EcoFlow
Prices may vary by retailer and are subject to change.