Head-to-head test
Anker SOLIX C800 Plus vs BLUETTI AC50B
These aren't the same size unit — the Anker gives you 320Wh more and 500W more output for $100 more, so the only real question is whether you need the bigger box or the lighter one.
Written by Wenny ZhengUpdated
Portable Power Tester, Station Arena Test Desk
Anker
SOLIX C800 Plus
2,199Power Score · Appliance Class
$649.00 list · direct from Anker
BLUETTI
AC50B
1,983Power Score · Device Hub
$279.00 list · direct from BLUETTI
Spec deltas
This is a size decision dressed up as a comparison. The Anker C800 Plus holds 768Wh and pushes 1,200W; the BLUETTI AC50B holds 448Wh and pushes 700W. The Anker costs $399, the BLUETTI $299. One is a mid-size station, the other a genuinely pocketable one — and pretending they're rivals for the same job is how people overbuy or underbuy.
The Anker wins on the numbers that describe capability: 320Wh more capacity, 500W more output, a slightly better cost per lifetime kilowatt-hour. If you're going to run a fridge for a full day or want margin for a bigger load down the line, that's your unit.
The BLUETTI's counter is physical and it's real: 14.8 pounds against 24. That's the difference between a unit you sling into a daypack's side pocket and one you carry with intent. For a light user who moves it constantly, less weight beats more watt-hours you won't drain.
What the Numbers Reveal
Each conclusion stated first — the numbers behind it on one line, the full analysis below.
weight
That lightness is only a virtue if 448Wh actually covers your day; the moment you need a fridge running past the afternoon, the weight you saved becomes capacity you don't have.
AC50B weight 14.8 lbsC800 Plus weight 24 lbsAC50B capacity 448Wh
Why it mattersBackpackers, day-trippers, and CPAP users who prize portability should take the AC50B; anyone whose loads run long enough to drain 448Wh should carry the extra pounds.
continuous output
So the output gap isn't about which runs a microwave — neither does — it's about which runs a 900W kettle or a hair dryer on low, and only the Anker gets close.
C800 Plus 1,200W outputAC50B 700W outputreviewers note the Anker can't run kettles or some coffee makersA10
Why it mattersIf your list is phones, laptops, lights, and a small fridge, both are fine; if there's anything heat-making on it, the Anker's 1,200W is the only one in reach.
The Anker stores more energy per dollar and spreads its price over more of it, so the bigger unit is also, counterintuitively, the cheaper one to actually use.
C800 Plus $0.17 per lifetime kWhAC50B $0.22 per lifetime kWhboth rated for thousands of cycles and a 5-year warranty
Why it mattersValue-focused buyers who'll use the capacity should note the bigger Anker is the lower cost-per-use, not just the higher sticker.
The specific dimensions that decide these two units — everything else is a tie.
Portability & Form Factor
Selected because: the 9.2-lb gap is the AC50B's entire case; lead here
weight
At 14.8 pounds the AC50B is one of the few LFP stations you can genuinely one-hand for a distance — reviewers single it out as meaningfully lighter than the AC70 it sits below, a sub-15-pound unit with a real battery insideB2. That's not a spec-sheet footnote; it's the reason to buy it.
The Anker's 24 pounds isn't heavy for its class, but it's a different act of carrying. If the unit lives in a trunk and comes out twice a year, nobody cares. If it moves with you daily, the BLUETTI's lightness is a feature you feel on every trip.
PowerScore Breakdown
Selected because: capacity + output gap is the Anker's case
overall power score
The Anker's higher score is capacity and output doing the talking: 768Wh against 448Wh, 1,200W against 700W. That's not a marginal edge — it's 320Wh more runway and 500W more headroom, enough to change what you can plug in, not just how long.
The BLUETTI isn't trying to win this fight. It's a smaller unit at a smaller price, and its 700W inverter is honest about what it is. The score gap is real; whether it matters depends entirely on whether your loads ever reach into it.
Lifetime Value
Selected because: $0.17 vs $0.22/kWh plus $100 sticker gap decides value
cost / lifetime kWh
Per lifetime kilowatt-hour the Anker is cheaper — $0.17 against $0.22 — because it packs more usable energy behind its price. Spread across a five-year warranty that's $80 a year to own versus the BLUETTI's $60, so the smaller unit is cheaper per year but pricier per unit of energy.
That's the value fork in one line: the BLUETTI costs less to buy and less to sit on the shelf, the Anker costs less every time you actually pull power from it. Which number matters is a question of how hard you'll use it.
Your Life, Your Pick
Selected because: shows the class difference — Anker covers more of the fitting loads
Both handle a CPAP night comfortably, and both fall well short of a camping weekend or a full blackout — the AC50B's 448Wh simply runs out sooner on every load that fits neither. Inside the small stuff, the class difference shows up as runtime, not capability.
The Anker's extra 320Wh is the margin between 'ran the fridge into the evening' and 'ran the fridge until mid-afternoon.' If your scenarios cluster at the small end, the BLUETTI keeps up; the longer the load, the more the Anker's tank tells.
What the Specs Don't Tell You
Selected because: noise and warranty fire and are worth interpreting
Both units carry the same five-year warranty, and both are rated at 45dB — so noise isn't a differentiator here the way it is against a whisper-quiet rival. Under sustained load either fan will make itself known; neither hides it.
The warranty math is the quiet tiebreak: identical coverage, with the Anker's higher price spread over more capacity. Neither unit gives you a longevity reason to prefer it — the batteries outlast the warranties either way.
Strengths & trade-offs
Anker SOLIX C800 Plus
Strengths
- +Larger battery capacity
- +Higher AC output
- +Faster solar charging
Trade-offs
- –Substantially more expensive (+$370) than the AC50B.
BLUETTI AC50B
Strengths
- +Costs $370 less
- +Lighter by 9.2 lb
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 covers a full 2,100Wh weekend, and the AC50B's 448Wh comes up shortest. If camping is the real job, treat these as day-trip units and size up — but between the two for a single overnight, the Anker's larger tank stretches further before it's out.
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 can fully handle this scenario (needs 1,645Wh). You'd need a higher-capacity station or to cut back on usage.
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
SOLIX C800 Plus
Both clear a CPAP night with room left over — a machine like this sips only a few hundred watt-hours. So the tiebreak is what's around it: the AC50B is lighter to keep on a nightstand, the Anker leaves more reserve for morning device charging. For pure CPAP duty, the featherweight wins on convenience.
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
Neither unit can fully handle this scenario (needs 910Wh). You'd need a higher-capacity station or to cut back on usage.
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
Neither unit
Neither unit can fully handle this scenario (needs 670Wh). You'd need a higher-capacity station or to cut back on usage.
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
For this load: SOLIX C800 Plus runs 3.2h vs 1.9h.
$649 list · direct from Anker
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 0–43.5hComfort & Convenience
Makes off-grid life actually enjoyablescale 0–8.7hHigh-Draw Appliances
These reveal the real limitsscale 0–0.7h¹ 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 16, 2026
Verdict: the SOLIX C800 Plus, on Power Score margin
The Anker C800 Plus is the more capable unit and the better value per stored watt-hour — 768Wh and a 1,200W inverter against the BLUETTI AC50B's 448Wh and 700W, for a $100 step up and a lower $0.17-per-lifetime-kWh cost. Take it if you want the headroom. But the AC50B has one advantage the spec sheet can't out-argue: at 14.8 pounds it's nearly ten pounds lighter, a genuine one-hand grab-and-go. If your loads are small — phones, a CPAP, a few hours of small-fridge backup — and you carry it often, the lighter, cheaper BLUETTI is the smarter buy, not the compromise.
Editor-assigned confidence, based on cited owner research and spec analysis.
List prices as of July 16, 2026. The links below open Anker's and BLUETTI's current prices.
$649.00 list · direct from Anker
or check the AC50B price$279.00 list
Written by Wenny Zheng, Portable Power Tester · Station Arena Test Desk · Updated July 16, 2026
Measured Data
Benchmark scores and the full spec record, side by side.
Benchmark scores
Not rated for both units (minimum threshold unmet): Tailgating.
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, SOLIX C800 Plus rates 4.0/5 (39th percentile of 19 Compact-class units), and AC50B rates 4.9/5 (95th 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 45dB — Noise Isn't the Tiebreak Here
Both units rate 45dB and both fans make themselves heard under sustained load, so unlike some matchups, quiet doesn't separate them. Decide on weight, capacity, and price — the acoustics are a wash.
Identical 5-Year Coverage
Both carry five years, so the warranty is a tie. The only nuance is cost-per-year — $80 for the Anker against $60 for the BLUETTI — which just re-states the sticker gap over more capacity.
Full record above — the Test Desk pick is the SOLIX C800 Plus.
Check SOLIX C800 Plus price →or check the AC50B 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 AC50B wins on both sticker price and long-term value. At $0.21/kWh over its lifetime, it's meaningfully cheaper to own. Clear value winner.
Brand trust
Anker
Ecosystem
7-8 SOLIX portable power stations across C-series (compact) and F-series (flagship), plus the X1 home energy system
Support
US-based support. Historically known for incredible no-hassle replacements, but recent reports describe AI-driven support agents giving generic responses and complex return logistics for heavy units (hazmat shipping). The Anker brand reputation is still strong, but SOLIX-specific support quality is trending down.
Community
Moderate — active Reddit (r/Anker, r/AnkerSOLIXCommunity) and growing. Benefits from Anker's massive consumer electronics brand awareness.
App experience
Rated 4.5/5 iOS (~1,100 ratings) · 4.3/5 Android
Unique strength
Parent brand trust from Anker's consumer electronics dominance. InfiniPower technology for long cycle life. Strong $/Wh value in the mid-size and larger units — the S2000, F2600 and C1000 are among the better buys per watt-hour in the catalog.
Worth knowing
Anker brings consumer-electronics trust and InfiniPower cells that earn the long cycle life, with an app that's among the better-rated in the category. The asterisk is SOLIX-specific support, which has slipped from its once-excellent standard, and firmware that has quietly dropped features.
BLUETTI
Ecosystem
One of the broadest lineups — 15-20+ models from budget (AC2A) to flagship (Apex 300, 3072Wh). Includes specialized products: vehicle solar hubs, sodium-ion cold-weather units, and balcony storage systems.
Support
The most inconsistent support in the space. Heavily email-based with China timezone delays. Some users get smooth, efficient service; others report weeks of troubleshooting runarounds, being offered discounts on new units instead of repairs, and confusing third-party purchase claim processes. Buying direct from Bluetti's website tends to produce better support outcomes.
Community
Active and growing — Reddit r/bluetti has a dedicated community. Second-largest after EcoFlow in engagement.
App experience
Rated 4.5/5 iOS and Android — tied for best app experience in the category. V3.0 UI redesign was well-received.
Unique strength
Among the best capacity-to-price ratios available — several Elite and Apex units are the lowest $/Wh in the catalog. Widest product diversity including industry-firsts like sodium-ion cold-weather units and dual solar+alternator vehicle hubs. Full LFP standardization across lineup (3,500-6,000+ cycles). Dual-voltage (120V/240V) in flagships.
Worth knowing
BLUETTI runs the broadest lineup in the space and the best capacity-per-dollar, and the AC50B is its cheapest LFP unit. The real risk is support: it's the most inconsistent in the category, email-based with timezone delays, and buying direct tends to produce better outcomes than third-party.
Analyst note
Anker is the steadier brand with a slipping support trend; BLUETTI is the value leader with the most inconsistent service. For a $300 unit that's a smaller gamble than it sounds — but if hassle-free support matters, factor BLUETTI's reputation into the price.
Growth path
SOLIX C800 Plus
FIXED CAPACITYFixed at 768Wh, 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.
AC50B
FIXED CAPACITYFixed at 448Wh, with no expansion — so size it for your needs up front rather than planning to add capacity later.
Accepts up to 200W 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
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 SOLIX C800 Plus 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.
Anker SOLIX C800 Plus
The fan is the C800 Plus's most-cited quirk: above 80F and around 1,030W one reviewer found it 'unavoidable and quite present in a quiet house'A1, though another judged it manageable at arm's length during chargingA11. Against a 448Wh unit, though, the Anker's story is mostly headroom — a reviewer's lone reservation was simply whether even 768Wh was enough for his ambitionsA5, and in practice the light loads went easily, with a fridge/freezer drawing just 10% over eight hoursA6.
Reviewers liked the companion app for remote monitoring and firmware updates, a feature one owner didn't expect to value until his first tripA7A15. The honest ceiling is heat-making appliances — it lacks the power for kettles or some coffee makersA10 — but that's a limit the smaller BLUETTI shares and then some. Note the field data here is professional-review level, not long-term ownership, so six-month durability remains an open question.
“The pole light felt is a little over the top and unnecessary.”
Sources
dustinabbott.net
BLUETTI AC50B
The AC50B's field reputation is built on being the affordable, genuinely portable LFP option: a 448Wh pack with 700W output (1,000W with Power Lifting), rated for 2,500+ cyclesB1, in a 14.8-pound body reviewers call a real sub-15-pound station rather than a toyB2. Charging is quick for the class — about three hours standard, dropping to roughly 1.25 hours with the optional Turbo charger, and 0-80% in 45 minutesB3.
One thing the spec table here marks as a closed system that owners actually flag as open: the AC50B can pair with the B80 for an extra 806WhB4. That's a real path past its 448Wh, but it's a second purchase carrying a second battery — worth knowing, not worth assuming. As BLUETTI's most affordable LiFePO4 station, its appeal is the price-to-portability ratio, and the field notes back that up.
“A 448Wh LiFePO4 battery with 700W output (1,000W Power Lifting), rated for 2,500+ cycles to 80% — years of reliable use.”
Sources
amazon.com · backuppowerhub.com · the-gadgeteer.com · t3.com · bluettipower.com · greattips3s.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 is consistently reported as noticeable during fast AC charging or high sustained wattage, though most reviewers call it 'manageable' rather than a dealbreaker. [SOLIX C800 Plus · 2 entries]
- The companion app is repeatedly praised for remote monitoring/control and firmware delivery, with no reviewers reporting connectivity or crash complaints. [SOLIX C800 Plus · 3 entries]
- 768Wh capacity is flagged by multiple reviewers as the unit's main limitation for heavy appliances and against same-price competitors, even though real-world light loads (fridge, gadgets) performed well. [SOLIX C800 Plus · 4 entries]
- The signature 'Plus' camping-light pole/torches are polarizing: some reviewers call the feature genuinely useful and a lantern-replacement, others call it an unnecessary gimmick that sacrifices the C800's cable-storage cubby. [SOLIX C800 Plus · 3 entries]
- Affordable, genuinely portable LFP unit with 700W output, 2,500+ cycles, fast Turbo charging, and B80 expandability. [AC50B · 3 entries]
- A1
“Once the temperature rose above 80F with a 1,030 average wattage, the fan noise was unavoidable and quite present in a quiet house.”
How-To Geek — 'Anker Solix C800 Plus Review: A Power Station Prepared to Illuminate Nighttime' · 2024-03 · [negative]
- A5
“My lone concern on this front is whether or not the battery capacity is sufficient.”
DustinAbbott.net — 'Anker Solix C800 Plus Power Station Review' · 2024-03 · [mixed]
- A6
“I connected the Anker and in 8 hours, my frig/freezer used 10% of the power.”
The Gadgeteer — 'Anker SOLIX C800 Plus power station review' · 2024-04 · [positive]
- A7
“My other power stations do not have a companion phone app. But after the first trip, I saw how this feature would come in handy.”
The Gadgeteer — 'Anker SOLIX C800 Plus power station review' · 2024-04 · [positive]
- A10
“it doesn't have the outright storage or power to tackle more heavy duty appliances like kettles or some coffee machines.”
Trusted Reviews — 'Anker SOLIX C800 Plus Review: A great camping companion' · 2024-04 · [negative]
- A11
“The fan does ramp up during fast charging, but the noise is manageable at roughly arm's length.”
The Power Pick — 'Anker SOLIX C800 Plus Review: Camping Lights Meet Serious Power' · 2026-02 · [mixed]
- A15
“Through the app, you can easily install firmware updates that may include performance enhancements, bug fixes, or new functionalities.”
Greener Ideal — 'Anker SOLIX C800 Plus Portable Power Station Review' · 2024-08 · [positive]
- B1
“A 448Wh LiFePO4 battery with 700W output (1,000W Power Lifting), rated for 2,500+ cycles to 80% — years of reliable use.”
amazon.com / backuppowerhub.com — AC50B review · 2026 · [positive]
- B2
“At 14.8 lbs it's meaningfully lighter than the AC70 (21.4 lbs) — a genuinely portable sub-15-lb unit with a long-cycle battery and 700W output at an easy-to-justify price.”
backuppowerhub.com / the-gadgeteer.com — AC50B review · 2026 · [positive]
- B3
“Standard AC charging is about 3 hours, dropping to 1.25 hours with the optional 480W Turbo charger; 0-80% in 45 minutes.”
amazon.com / t3.com — AC50B review · 2026 · [positive]
- B4
“Expandable — pair with the B80 battery for an additional 806Wh; at $279 it's BLUETTI's most affordable LiFePO4 station.”
bluettipower.com / greattips3s.com — AC50B review · 2026 · [positive]
Research compiled July 16, 2026.
Who Should Buy Which
Buy the SOLIX C800 Plus if you…
- →The buyer who wants a fridge running into the evening, not just the afternoon — 768Wh is the difference.
- →Anyone with a mid-draw appliance in mind, where 1,200W has a fighting chance and 700W doesn't.
- →The value shopper who'll use the unit hard, since $0.17 per lifetime kWh beats the BLUETTI's $0.22.
Buy the AC50B if you…
- →The person who carries it constantly — 14.8 pounds is a daypack-side-pocket weight the 24-pound Anker can't match.
- →Light-load users: phones, a CPAP, laptops, a small fridge for a few hours all fit inside 448Wh.
- →The lowest-budget buyer who wants real LFP longevity at $299 and doesn't need the extra tank.
If neither fits
If you're eyeing a full weekend of camping or an all-day blackout, both run dry — the AC50B's 448Wh especially. Look at a 1,000Wh-plus station instead of stretching either of these past what it's built for.
The Bottom Line
Pick by size, not by scoreboard. The Anker C800 Plus is the more capable unit — 320Wh more, 500W more, and cheaper per watt-hour used — and it's the right call for anyone whose loads run long or reach past 700W. For $100 more you get a genuinely bigger machine, and you'll feel the difference every time a load runs into the evening.
But the BLUETTI AC50B isn't the loser here — it's the specialist. At 14.8 pounds and $299 it's the one you actually carry, and for a light user who values that, the extra Anker watt-hours are weight and money spent on runtime they'd never drain. Buy the tank if you'll fill it; buy the featherweight if you won't.
Frequently Asked Questions
Answers drawn from the spec record and cited owner research.
Is the Anker C800 Plus worth $100 more than the BLUETTI AC50B?
If you'll use the extra capacity, yes — you get 320Wh more, 500W more output, and a lower cost per lifetime kilowatt-hour. If your loads are small and portability is the priority, the $299 AC50B does the light jobs for less and weighs nearly ten pounds less. It's a need question, not a quality one.
How much lighter is the BLUETTI AC50B?
It's 14.8 pounds against the Anker's 24 — a 9.2-pound gap. That's the difference between a one-hand grab-and-go and a deliberate two-hand carry. For a unit you move often, it's the AC50B's single strongest argument.
Can either one run a full-size fridge overnight?
The Anker can stretch a small fridge into the evening — a reviewer saw a fridge/freezer use just 10% over eight hours — while the AC50B's 448Wh runs the same load a good deal shorter. Neither is a true whole-night-plus fridge unit for a large appliance, but the Anker's extra 320Wh buys meaningfully more runtime.
Is the AC50B really expandable?
It can pair with BLUETTI's B80 battery for an extra 806Wh, which reviewers note, even though the base spec treats it as a closed unit. That's a real capacity path, but it's a separate purchase and a second box to carry — plan for it as an upgrade you'd buy, not headroom you already own.
Which lasts longer?
Both use LFP cells rated for thousands of cycles and carry five-year warranties, so both will outlive their warranty periods many times over. The Anker edges the cost math at $0.17 per lifetime kilowatt-hour versus $0.22, but neither will die of old age before you'd want to upgrade anyway.
Where to buy
Anker SOLIX C800 PlusPick
$649.00
$649.00 list · direct from Anker
BLUETTI AC50B
$279.00
$279.00 list · direct from BLUETTI
Prices may vary by retailer and are subject to change.