Head-to-head test
Anker SOLIX S5000 vs BLUETTI EP900 + 4×B500
At 19,840 Wh the BLUETTI is a different purchase, a multi-day home battery with 9,000 W of solar to refill it, and the S5000 only competes once you bolt three unpriced packs onto it and then feed the lot through 3,000 W of solar.
Full profiles: Anker SOLIX S5000 → · BLUETTI EP900 + 4×B500 →
Written by Gunner GustafsonUpdated
Whole-Home Backup Tester, Station Arena Test Desk
Spec deltas
The EP900 with four B500 batteries holds 19,840 Wh. The S5000 holds 5,024. Someone shopping both is usually asking whether the Anker can stand in for a whole-home battery, and at this size the answer is no.
After the same eight-hour blackout, the BLUETTI has enough left for about 9.3 more nights like it; the S5000 has about 1.6. That gap is the product. The $14,798 difference buys a system that rides out a week, wired into a subpanel and fed by up to 9,000 W of solar.
The S5000 has real virtues here, starting with a lower cost per lifetime kWh and wheels. They just answer a smaller question.
What the Numbers Reveal
Each conclusion stated first — the numbers behind it on one line, the full analysis below.
So the $14,798 gap doesn't compare like with like. The BLUETTI's price is a complete 20 kWh system; the S5000's is the first quarter of one, with the rest unpriced.
8-Hour Blackout: EP900 + 4×B500 ends with 15,219 Wh left, about 9.3 more nights8-Hour Blackout: S5000 ends with 2,625 Wh left, about 1.6 more nightsS5000 plus three BP5000 packs = 20,096 WhA6; our record has no BP5000 price
Why it mattersIf you need 20 kWh, compare the BLUETTI against a fully priced S5000 stack, not against the base unit.
solar input
A fully expanded S5000 would need around ten hours of full-rated sun to refill, which is more than a winter day gives. The BLUETTI's 9,000 W ceiling is sized for the bank it's paired with, and that is what makes a multi-day off-grid plan work.
EP900 + 4×B500 solar input 9,000 W; 19,840 ÷ 9,000 ≈ 2 hours of full-rated inputS5000 solar input 3,000 W; expands to 30,144 WhA5A630,144 ÷ 3,000 ≈ 10 hours of full-rated input
Why it mattersIf your plan is to run the house on solar through a long outage, the BLUETTI is the one built for it; the S5000 only gets there if Anker's pack charging fills the gap, which our record doesn't show.
cost / lifetime kWh
That only helps if you can use the energy. A buyer sizing for 20 kWh who settles for 5 kWh hasn't saved anything, they've bought a different outcome. The BLUETTI also covers its premium with twice the warranty term, which on a system this size is worth having.
Cost per lifetime kWh: S5000 $0.08, EP900 + 4×B500 $0.15Both rated for 6,000 cyclesWarranty: S5000 5 years, EP900 + 4×B500 10 years
Why it mattersCheaper energy is the S5000's case for buyers who need less; it isn't a reason to downsize a plan you've already sized for days.
The specific dimensions that decide these two units — everything else is a tie.
Runtime: Will It Power Your Gear?
Selected because: After the same blackout the BLUETTI has about 9.3 more nights in reserve against the S5000's 1.6, and that's the reason to buy a system this size.
continuous output
The S5000 handles one night. The BLUETTI handles a week. Every scenario on this page fits inside either of them except Van Life, which the S5000 misses by 415 Wh and the BLUETTI can't drive to.
Where the BLUETTI wins on the chart, the 8-Hour Blackout and the Remote Workday, it wins by having nine-tenths of its bank left over. That reserve is what you're buying.
Growth Path
Selected because: The S5000 can grow past this BLUETTI's 19,840 Wh, but its 3,000 W of solar has to refill everything it grows into.
solar input
On paper the S5000 grows further, to 30,144 Wh with five BP5000 packsA6, past this BLUETTI configuration. The EP900 platform itself reaches further still with more B500 modules, and one forum poster was already eyeing installs past 19 kWhB9.
The catch is the inflow. Every one of those Anker watt-hours comes back through 3,000 W of solar, on what our record shows. A big bank behind a small solar input is a reservoir with a garden hose, and the BLUETTI's 9,000 W is the bigger pipe.
Lifetime Value
Selected because: The S5000 is cheaper per lifetime kWh, the one honest point against our pick, and worth weighing against what each actually delivers.
cost / lifetime kWh
Eight cents a lifetime kWh against fifteen. On cost per unit of energy the S5000 wins, and on the same 6,000-cycle rating that isn't a trick of the maths.
But lifetime value assumes you'll cycle the whole bank. A home battery sized for long outages may sit mostly full for months; what you're paying for is the reserve on the bad week, and only one of these has it.
What the Specs Don't Tell You
Selected because: A 589 lb installed stack and a ten-year warranty against five shape what owning each one is like.
At 589 lb the BLUETTI is an installation, so its weight is the installer's concern on day one and nobody's after that. The S5000's 97 lb on wheels is the one you'll actually wrestle, tipping it back on the foot step to roll itA10.
The warranty card is the one to read twice. Ten years against five, on a system this expensive, means a year-six fault is still BLUETTI's to fix. That's the clearest thing the price buys beyond capacity.
Strengths & trade-offs
Anker SOLIX S5000
Strengths
- +Costs $14,798 less
- +Lighter by 492 lb
Trade-offs
- –Weaker inverter (-4,500W) limits appliance compatibility.
- –Very heavy unit that may be difficult for one person to lift.
BLUETTI EP900 + 4×B500
Strengths
- +Larger battery capacity
- +Higher AC output
- +Longer warranty
- +Faster solar charging
Trade-offs
- –Substantially more expensive (+$14,798) than the SOLIX S5000.
- –Significantly heavier (+492 lbs), making it harder to move.
- –Very heavy unit that may be difficult for one person to lift.
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
SOLIX S5000
The EP900 + 4×B500 is installed at the electrical panel — it backs up the building and doesn't leave it, so this scenario belongs to the SOLIX S5000 by default — and it earns it, covering the 2,100Wh with 2,170Wh to spare. Capacity was never the EP900 + 4×B500's problem here; getting to a campsite was.
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
EP900 + 4×B500
Both survive the night. The EP900 + 4×B500 finishes at 10% used with 15,219Wh left — 9.3 more nights like it. The SOLIX S5000 finishes at 39% with 2,625Wh, 1.6 more nights like it. If your outages tend to run past one evening, that difference is the whole argument between them.
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 S5000
A CPAP is about 40W for eight hours, so both of these cover the night several times over — capacity isn't the question here, and the percentages are a formality. What matters is the box next to your pillow, and the only published difference is a rating: the SOLIX S5000 is rated 30dB against the EP900 + 4×B500's 50dB. Each is the maker's own published rating, and the makers do not measure the same way, some quoting a best case and some a figure under load, so neither number describes a 40W draw and the two are not really comparable. Treat them as a reason to look for hands-on reports before either one goes next to a bed, not as a difference you can count on hearing.
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
EP900 + 4×B500
The EP900 + 4×B500 clears the workday at 5% used, banking 15,954Wh — late work, extra calls, or a second laptop charge without arithmetic. The SOLIX S5000 at 21% also finishes, with 3,360Wh of slack for the unplanned.
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
SOLIX S5000
The EP900 + 4×B500 is installed at the electrical panel — it backs up the building and doesn't leave it, so this scenario belongs to the SOLIX S5000 by default — and it earns it, covering the 670Wh with 3,600Wh to spare. Capacity was never the EP900 + 4×B500's problem here; getting to a tailgate was.
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 gives you a powered van: the EP900 + 4×B500 has the energy but is wired to the building, and the SOLIX S5000 covers about 91% of the 4,685Wh. One can't go; the other can't finish.
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: EP900 + 4×B500 runs 82.3h vs 20.8h.
$17,298 list · direct from BLUETTI
Planning for more than this? Describe your whole setup and get it sized →
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 0–1124.3hComfort & Convenience
Makes off-grid life actually enjoyablescale 0–224.9hHigh-Draw Appliances
These reveal the real limitsscale 0–16.9h¹ 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
October 9, 2026
Verdict: the EP900 + 4×B500, on Power Score margin
If you've arrived at a 20 kWh system, buy the EP900 + 4×B500. It holds 19,840 Wh, refills from up to 9,000 W of solar, runs 9,000 W continuously and carries 10 years of warranty, and it comes priced as a whole. The S5000 needs three BP5000 packs to reach 20,096 WhA6, our record has no price for those packs, and its 3,000 W of solar would take about ten hours of full-rated sun to refill a fully expanded stack. The S5000 is still cheaper per lifetime kWh and is the right buy for anyone whose real need is one or two nights. For a buyer this size it's the wrong tool. Confidence is 6 because the BLUETTI's field record is thin and its support reputation is unevenB0B1B2.
Editor-assigned confidence, based on cited owner research and spec analysis.
List prices as of October 9, 2026. The links below open Anker's and BLUETTI's current prices.
$17,298.00 · direct from BLUETTI
Last checked 28 days ago. Prices move — check before you buy.
or check the SOLIX S5000 price$2,499.99 list
Written by Gunner Gustafson, Whole-Home Backup Tester · Station Arena Test Desk · Updated October 9, 2026
Black Friday · 45 days out
Price to beat:EP900 + 4×B500 $17,298
We have never seen it discounted, so any real cut would be a first.
Measured Data
Benchmark scores and the full spec record, side by side.
Benchmark scores
Not rated for both units (minimum threshold unmet): Solar Generator.
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 S5000 rates 4.6/5 (74th percentile of 20 Home Backup-class units), and EP900 + 4×B500 rates 4.3/5 (57th percentile of 29 Whole-Home / Off-Grid-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.
Weight Reality Check
Neither unit is grab-and-go. The SOLIX S5000 (97 lbs) is manageable solo but heavier than a large checked suitcase. The EP900 + 4×B500 (589 lbs) is a wall-installed system — its weight matters to the installer on day one, then never again.
EP900 + 4×B500: 50dB Published
50dB is about as loud as moderate rainfall. The SOLIX S5000 is rated 30dB — 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.
Warranty: 10 Years vs 5
The EP900 + 4×B500 is covered for 10 years against the SOLIX S5000's 5 years. The cheaper SOLIX S5000 does buy more warranty per dollar (2 years per $1,000 against 0.6), but that is a statement about price, not about coverage — if a fault appears in year 6, only one of these is still covered. An underrated factor if you're keeping this unit for years.
Full record above — the Test Desk pick is the EP900 + 4×B500.
Check EP900 + 4×B500 price →or check the SOLIX S5000 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 SOLIX S5000 wins on both sticker price and long-term value. At $0.08/kWh over its lifetime, it's meaningfully cheaper to own. Clear value winner. One thing to know reading the table: both carry the same 6,000-cycle rating, so the lifetime rows are sticker price and capacity in disguise — the wear horizon is identical and decides nothing here.
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
Anker brings mainstream consumer-electronics reach, a well-rated app that's confirmed for this unit, and InfiniPower, its name for the long-cycle-life design.
Worth knowing
Reports suggest SOLIX support has slipped from Anker's historic standard, returns of heavy units involve hazmat shipping, and firmware updates have removed features without warning.
BLUETTI
Ecosystem
One of the broadest lineups — 15-20+ models from budget (AC2A) to flagship portable (Apex 300, 2764.8Wh). 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. LFP across the rest of the range, though rated cycle life spans 2,500 (EB3A) to 6,000, and it varies WITHIN the Elite range rather than tracking it — the Elite 300 and Elite 200 V2 are rated 6,000 while the Elite 30 V2, Elite 10 Mini, Elite 320 and Elite 400 are rated 3,000+ and the Elite 100 V2 4,000+, so check the specific model. Dual-voltage (120V/240V) in flagships.
Worth knowing
BLUETTI support is the most inconsistent in the space, with some buyers well served and others stuck for weeks; buying direct helps. On a hardwired home system kept for a decade, that's the main thing to plan around.
Analyst note
BLUETTI's support risk is the larger, but its warranty runs twice as long. On a system this size, buy direct.
Growth path
SOLIX S5000
EXPANDABLESupports Anker expansion batteries, so you can add capacity later without replacing the base unit — useful if your needs may climb past 5,024Wh.
Accepts up to 3,000W of solar. Enough for a serious multi-panel array.
Adequate ports for most setups, but heavy users may want a power strip.
Expansion batteries are Anker-specific. You're investing in the Anker ecosystem.
EP900 + 4×B500
EXPANDABLESupports BLUETTI expansion batteries, so you can add capacity later without replacing the base unit — useful if your needs may climb past 19,840Wh.
Accepts up to 9,000W of solar. Enough for a serious multi-panel array.
Limited ports. You'll likely need a power strip or splitter.
Expansion batteries are BLUETTI-specific. You're investing in the BLUETTI ecosystem.
Realistic full solar rechargeat 70% of rated panel output — see methodology
Analyst note
Both expand, but the EP900 + 4×B500's higher solar ceiling (9,000W vs 3,000W) 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.
Anker SOLIX S5000
There's no hands-on evidence on the S5000 yet; everything we have is Anker's documentationA0. It establishes the 3,000 W of solar across two inputs and the expansion to 30,144 Wh with five BP5000 packs from the rating labelA5A6, and the 6,000-cycle rating to 80% with a 5-year warranty from the product pageA12. Treat it as the maker's specification, not as anyone's experience.
“5,024 Wh LiFePO4 pack rated 16 V, 314 Ah; the cell code IFpP72/175/208[5S] reads as five large prismatic cells in series.”
Sources
ankersolix.com
BLUETTI EP900 + 4×B500
Field data on the EP900 is thin, and most of what exists is pre-purchase discussion rather than months-later reportsB0. The specific praise is for the build: tidy battery cabling instead of thick cables sticking out of the side, and a heavy-duty DC disconnect rather than a buttonB6B7B8.
The doubts are consistent. Prospective buyers hesitate over BLUETTI supportB1B2, a forum commenter doubted it would cope with real heat or cold installed outsideB4, and another called the marketing unrealistic and wondered what the units consume themselvesB5.
“on paper it's a dream but who knows with Bluetti tech support?”
Sources
diysolarforum.com · lifenhancer.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
- No owner or reviewer reports exist yet: every entry is Anker documentation (rating label, product page, launch announcement), plus one of our own readings of the app and label drawing. [SOLIX S5000 · 20 entries]
- Prospective buyers repeatedly express hesitation about Bluetti customer service/support quality before purchasing, based on secondhand reports rather than direct long-term ownership. [EP900 + 4×B500 · 2 entries]
- Forum commenters are skeptical of Bluetti's outdoor-rated marketing claims, especially regarding real-world heat/cold performance and unclear standby power consumption. [EP900 + 4×B500 · 2 entries]
- Physical build details (cable routing, DC disconnect switch) draw specific praise as improvements over older Bluetti portable units. [EP900 + 4×B500 · 3 entries]
- A5
“Two solar inputs, 3,000 W together: 11–60 V at 17 A (1,000 W) and 16–165 V at 17 A (2,000 W).”
Anker rating label, model AS510 (certified 2026-09-15) · 2026-09-15 · [positive]
- A6
“Expands with up to five BP5000 expansion batteries (model AS5101A1-85), each 5,024 Wh, for 30,144 Wh in total. They join through a 400 V DC port rated 9,000 W in and 7,500 W out; each battery charges at up to 3,200 W and discharges at up to 3,000 W.”
Anker rating label, model AS510 (certified 2026-09-15) · 2026-09-15 · [positive]
- A10
“An upright cabinet with a handle on top, a full-width front panel with a display, and wheels at the base; the label drawing of the back adds a foot step marked STEP ON for tipping it back onto its wheels.”
Power Station Arena, read from the S5000 card in the Anker app and the label drawing, 2026-09-20 · 2026-09-15 · [positive]
- A12
“Cycle life: 6,000 cycles to 80% capacity, 10,000 cycles to 60%; Anker estimates a 15-year lifespan at 1 to 2 cycles a day, with 5 years of product coverage.”
Anker SOLIX S5000 product page, ankersolix.com/s5000 (published 2026-10-09) · 2026-10-09 · [positive]
- B1
“on paper it's a dream but who knows with Bluetti tech support?”
diysolarforum.com — 'Bluetti EP900' thread · 2023-04 · [mixed]
- B2
“The cost seems really competitive, but I'm concerned about some very negative customer service reviews.”
diysolarforum.com — 'Bluetti EP900' thread · 2023-04 · [negative]
- B4
“It may have temperature protections, or even internal heat, but if you need to use it in real heat, or real cold for a string of near solar-less winter days I wouldn't count on it if it's installed outside.”
diysolarforum.com — 'Bluetti EP900 to Power your House' thread · 2023-04 · [negative]
- B5
“Imho, Bluetti marketing is quite unrealistic. I wonder what the units consume themselves.”
diysolarforum.com — 'Bluetti EP900 to Power your House' thread · 2023-04 · [negative]
- B6
“Nice that Bluetti finally came up with a battery cable system between it's batteries that isn't a giant bulky obtrusive cable sticking a foot out. Well done.”
diysolarforum.com — 'Bluetti EP900 to Power your House' thread · 2023-04 · [positive]
- B7
“I really like that there's a heavy-duty DC disconnect on these units rather than a button or switch. This will be much more reliable long term.”
lifenhancer.com — 'Bluetti EP900 Review' · 2025-03 · [positive]
- B8
“There aren't any thick cables sticking out of the side like there are on the AC200, 300, and 500, because they're all run neatly inside the protective covers on the left of the unit.”
lifenhancer.com — 'Bluetti EP900 Review' (owner in Costa Rica, EP900 + 3×B500) · 2025-03 · [positive]
- B9
“I'd be interested in seeing an install over 19kWhr max stack, meaning 2 EP900's with Microinverter solar would be a bonus.”
diysolarforum.com — 'Bluetti EP900' thread · 2023-04 · [positive]
Research compiled October 9, 2026.
Who Should Buy Which
Buy the SOLIX S5000 if you…
- →You want a night or two of backup for essentials, plus a battery that rolls out to the driveway or the campground when the grid is fine.
- →You'd rather start at 5,024 Wh and add BP5000 packs later than commit to 20 kWh up front.
Buy the EP900 + 4×B500 if you…
- →You're planning for outages measured in days, want the whole house on battery through them, and have the roof for a large solar array to keep it topped up.
- →You want a permanent, hardwired system with ten years of warranty, and you'll buy direct from BLUETTI to give yourself the best shot at good support.
If neither fits
If your outages are a few hours and the goal is keeping the fridge cold and the Wi-Fi up, you need neither of these. A 1 to 2 kWh portable does that, and you can carry it.
The Bottom Line
Nine more nights against under two, a solar input sized to refill a 20 kWh bank, and a decade of warranty: if that's what you came for, the EP900 + 4×B500 is the system, and the S5000 is a smaller machine that would need three unpriced packs and more sun than it can take in to keep up.
If what you really need is one good night and a battery you can roll to the truck, that's the S5000's job. For a whole-home, days-long plan, buy the BLUETTI.
Frequently Asked Questions
Answers drawn from the spec record and cited owner research.
Can the Anker SOLIX S5000 replace a BLUETTI EP900 with four B500 batteries?
Not on its own. The S5000 holds 5,024 Wh against the BLUETTI's 19,840 Wh, and it needs three BP5000 packs to reach 20,096 Wh. Our record has no price for those packs, so the true cost of the matched setup is unknown.
How many days of backup does the EP900 + 4×B500 give compared to the S5000?
After an eight-hour blackout on our standard household load, the BLUETTI still has about 9.3 more nights like it in reserve, the S5000 about 1.6. That gap is the main reason to buy a system this size.
Which charges faster from solar?
Each refills its own base bank quickly with enough panels, but the BLUETTI accepts up to 9,000 W against the S5000's 3,000 W. As the S5000 grows the difference matters: a fully expanded 30,144 Wh stack would need about ten hours of full-rated input at 3,000 W.
Is the S5000 better value than the EP900 + 4×B500?
Per unit of energy, yes: $0.08 per lifetime kWh against the BLUETTI's $0.15, on the same 6,000-cycle rating. But it holds a quarter of the energy, so it's better value only if a quarter is all you need.
Where to buy
Anker SOLIX S5000
$2,499.99
$2,499.99 · direct from Anker
BLUETTI EP900 + 4×B500Pick
$17,298.00
$17,298.00 · direct from BLUETTI
Last checked 28 days ago. Prices move — check before you buy.
Prices may vary by retailer and are subject to change.