Head-to-head test
Anker SOLIX S5000 vs BLUETTI EP900 + 2×B500
Both packs carry the same 6,000-cycle rating, so this comes down to what a watt-hour costs: the S5000 delivers a lifetime kilowatt-hour for $0.08 against the EP900 stack's $0.17, and the BLUETTI's premium buys a wired-in panel and a 10-year warranty rather than cheaper energy.
Full profiles: Anker SOLIX S5000 → · BLUETTI EP900 + 2×B500 →
Written by Gunner GustafsonUpdated
Whole-Home Backup Tester, Station Arena Test Desk
Spec deltas
The S5000 costs $2,500 and the EP900 with two B500 batteries costs $10,298, and both are built on LiFePO4 rated for the same 6,000 cycles. Divide the price by everything each pack will deliver over those cycles and the Anker comes out at $0.08 per lifetime kilowatt-hour, the BLUETTI at $0.17.
That doesn't make the BLUETTI a bad buy. It makes it a different one. The EP900 is a home energy system that an installer wires into a subpanel and never moves again, at 343 lb. The S5000 is a 97 lb cabinet on wheels with its own outlets, including a 240 V L14-30RA3A11. One is infrastructure. The other is an appliance that happens to be big enough to act like infrastructure.
So the real question is whether you want to pay for the installation-grade version. Most people asking it don't need to.
What the Numbers Reveal
Each conclusion stated first — the numbers behind it on one line, the full analysis below.
cost / lifetime kWh
The premium isn't buying better cells or longer life per cycle. It's buying five extra years of warranty and the hardwired format. Those are real, but they are services, and you should price them as services rather than assume the more expensive stack is the better battery.
S5000: 5,024 Wh, 6,000 cycles, 30,144 lifetime kWh, $0.08 per lifetime kWhEP900 + 2×B500: 9,920 Wh, 6,000 cycles, 59,520 lifetime kWh, $0.17 per lifetime kWhWarranty: S5000 5 years, EP900 + 2×B500 10 years
Why it mattersIf you were drawn to the EP900 because it seemed the more serious battery, check whether you actually want the installation and the decade of cover, because the cells themselves are rated alike.
Capacity
Our record has no price for the BP5000, so we can't tell you what the matched pair costs. What we can tell you is that the matched S5000 is still a system whose base unit rolls out to a campsite or a driveway, while the EP900 never leaves the wall it's bolted to.
S5000 expands with up to five BP5000 packs of 5,024 Wh eachA6S5000 plus one BP5000 = 10,048 WhEP900 + 2×B500: 9,920 Wh, hardwired, 343 lb
Why it mattersAnyone choosing the EP900 for capacity alone should price one BP5000 before spending the larger sum.
solar input
With panels on the roof, the S5000's 3,000 W of solar can put back its whole 5,024 Wh in under two hours of full-rated sun (5,024 ÷ 3,000), so a sunny multi-day outage leans its way. A grey week with no recharge is where the EP900's bigger bank and 9,000 W solar ceiling earn their keep.
8-Hour Blackout: S5000 has 2,625 Wh left, about 1.6 more nights8-Hour Blackout: EP900 + 2×B500 has 6,787 Wh left, about 4.1 more nightsSolar input: S5000 3,000 W, EP900 + 2×B500 9,000 W
Why it mattersIf your outages are long, wintry and sunless, the EP900 is the honest pick; if they are a night or two, the S5000 already covers them.
The specific dimensions that decide these two units — everything else is a tie.
Lifetime Value
Selected because: Both packs are rated for 6,000 cycles, so cost per lifetime kWh is the cleanest way to see what each one charges for its energy.
cost / lifetime kWh
Eight cents against seventeen. Both batteries are rated to the same 6,000 cycles, so the gap isn't about one pack wearing out sooner; it's simply that the BLUETTI asks about twice as much per watt-hour of storage, and keeps asking for every cycle you put through it.
The warranty is where the BLUETTI claws some of that back. Ten years of cover against five means a fault in year seven is BLUETTI's problem and an S5000 fault in year seven is yours. If you plan to own this for a decade, put a value on that before you compare the two prices.
Growth Path
Selected because: One BP5000 pack takes the S5000 to 10,048 Wh, past this BLUETTI configuration's 9,920 Wh, so expansion changes the capacity argument.
solar input
Both systems grow, and the S5000's path is the one that matters here, because its first step lands it level with this BLUETTI. One BP5000 makes 10,048 Wh; five make 30,144 WhA6. The EP900 platform goes further on the BLUETTI side, to about 39.6 kWh with eight B500 modulesB2, so neither one paints you into a corner.
The engine's growth note favours the BLUETTI on its 9,000 W solar ceiling, and for a big rooftop array feeding a big bank that is fair. For a home that charges mostly from the grid and only occasionally from panels, the S5000's 3,000 W is already more than most roofs will feed it.
Runtime: Will It Power Your Gear?
Selected because: Both clear an eight-hour blackout easily; the difference is how many nights after that each one covers.
continuous output
An eight-hour outage uses 39% of the S5000's usable energy and 20% of the BLUETTI's. Neither number is a worry. What the BLUETTI buys is the morning after: roughly 4.1 more nights like it against the S5000's 1.6.
One spec-sheet catch on the Anker side: its label rates it for non-habitable spaces and says a unit holding more than 1 kWh belongs outside sleeping rooms and living spacesA7. That puts it in the garage or utility room, much like the EP900, so plan a cord run rather than a bedside spot.
Brand Trust
Selected because: A 10-year warranty against 5 is the clearest thing the BLUETTI's higher price buys, and support is what makes a warranty worth having.
The BLUETTI's 10-year term is the longest promise on this page, and the brand profile is blunt that its support is inconsistent, with better outcomes when you buy direct. That combination argues for buying the EP900 from BLUETTI itself if you buy it at all.
Anker's 5 years is shorter, and its brand profile notes that support for the SOLIX line has slipped from its historically strong level. Neither brand gets a free pass here; the BLUETTI simply gives you twice as long to need its help.
Strengths & trade-offs
Anker SOLIX S5000
Strengths
- +Costs $7,798 less
- +Lighter by 246 lb
Trade-offs
- –Weaker inverter (-3,100W) limits appliance compatibility.
- –Very heavy unit that may be difficult for one person to lift.
BLUETTI EP900 + 2×B500
Strengths
- +Larger battery capacity
- +Higher AC output
- +Longer warranty
- +Faster solar charging
Trade-offs
- –Substantially more expensive (+$7,798) than the SOLIX S5000.
- –Significantly heavier (+246 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 + 2×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 + 2×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 + 2×B500
Both survive the night. The EP900 + 2×B500 finishes at 20% used with 6,787Wh left — 4.1 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 + 2×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 + 2×B500
The EP900 + 2×B500 clears the workday at 11% used, banking 7,522Wh — 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 + 2×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 + 2×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 + 2×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 + 2×B500 runs 41.1h vs 20.8h.
$10,298 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 0–562.1hComfort & Convenience
Makes off-grid life actually enjoyablescale 0–112.4hHigh-Draw Appliances
These reveal the real limitsscale 0–8.4h¹ 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 Anker SOLIX S5000
Take the S5000. Both batteries are rated for 6,000 cycles, so the only thing the extra $7,798 buys in energy terms is a bigger tank, and the S5000 closes most of that with a single BP5000 pack, which takes it to 10,048 Wh against the BLUETTI's 9,920A6. What the BLUETTI money really buys is an installed system: hardwired to a subpanel, 10 years of warranty against 5, and a higher continuous output than the S5000's 4,500 W. If that is the job, buy the EP900. If the job is keeping a house running through outages while owning a box you can roll out the door, the S5000 does it for a fraction of the outlay. Confidence stops at 7 because nobody outside Anker has tested an S5000 yet.
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.
$2,499.99 · direct from Anker
or check the EP900 + 2×B500 price$10,298.00 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 + 2×B500 $10,298
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 + 2×B500 rates 3.7/5 (21st 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 + 2×B500 (343 lbs) is a wall-installed system — its weight matters to the installer on day one, then never again.
EP900 + 2×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 + 2×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 1), 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 SOLIX S5000.
Check SOLIX S5000 price →or check the EP900 + 2×B500 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 its consumer-electronics scale and an app that rates well on both phone platforms; on this unit the app is confirmed and talks over Wi-Fi and Bluetooth.
Worth knowing
Support for the SOLIX line has reportedly slipped from Anker's historically strong level, and returning a heavy battery involves hazmat freight. Firmware updates have also removed features before.
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's support is the least consistent in the category, and buying direct from BLUETTI tends to go better than buying through a third party. On a hardwired system you'll keep for ten years, that matters.
Analyst note
Neither brand wins on support reputation. The BLUETTI's longer warranty term is the concrete difference, and it's the one to weigh.
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 + 2×B500
EXPANDABLESupports BLUETTI expansion batteries, so you can add capacity later without replacing the base unit — useful if your needs may climb past 9,920Wh.
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 + 2×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
Nobody outside Anker has run an S5000 yet, so what we have is Anker's own documentation. The rating label establishes the 5,024 Wh LiFePO4 pack and the 4,500 W output at 120 V or 240 V split-phaseA1A2; the product page adds the 97 lb weight on wheels, the 6,000-cycle rating to 80% and the ≤10 ms switchoverA11A12A13. All of it is the maker describing its product, not anyone's experience of using oneA0.
“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 + 2×B500
Field evidence on this configuration is thin, and most of what exists describes the platform rather than living with itB0. One owner reported that the 10 ms transfer to battery was completely unnoticeable during outagesB3, and another said that tied to solar they can virtually go off-gridB4. The rest is BLUETTI's own description of a 9,000 W inverter that runs a washer, dryer, heater and refrigerator, and of expansion to about 39.6 kWhB1B2, which is the spec sheet rather than a report from a living room.
“A whole-home system: one EP900 inverter provides up to 9,000W (18,000W with two units), enough to run a washer, dryer, heater, and refrigerator.”
Sources
bluettipower.com · bestgeneratorsolar.com · mightygenerators.com · bgr.com · offgridsource.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]
- Whole-home 9,000W output, large B500 expandability (to ~39.6kWh), 10ms UPS, and solar off-grid capability are the standout features. [EP900 + 2×B500 · 3 entries]
- A1
“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.”
Anker rating label, model AS510 (certified 2026-09-15) · 2026-09-15 · [positive]
- A2
“AC output 4,500 W max, either at 120 V (37.5 A across the outlets) or at 120/240 V split-phase (18.75 A).”
Anker rating label, model AS510 (certified 2026-09-15) · 2026-09-15 · [positive]
- A3
“Outlets: one L14-30R carrying 240 V split-phase at up to 4,500 W; one TT-30R RV outlet at 120 V, 30 A, 3,600 W; NEMA 5-20R household outlets at 120 V, 20 A, 2,400 W; USB-C 100 W, USB-C 15 W and USB-A 12 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]
- A7
“Rated for residential non-habitable spaces; holding more than 1 kWh, it belongs outside sleeping rooms and other living spaces.”
Anker rating label, model AS510 (certified 2026-09-15) · 2026-09-15 · [mixed]
- A11
“Net weight 97 lb; 10.6 × 22.0 × 15.2 in (W × D × H), on wheels with a pull rod and foot pedal.”
Anker SOLIX S5000 product page, ankersolix.com/s5000 (published 2026-10-09) · 2026-10-09 · [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]
- A13
“UPS switchover ≤10 ms; Anker quotes 30 dB in quiet operation.”
Anker SOLIX S5000 product page, ankersolix.com/s5000 (published 2026-10-09) · 2026-10-09 · [positive]
- A15
“Front panel: four NEMA 5-20R outlets at 120 V, one L14-30R and one TT-30R, plus USB-A 12 W, USB-C 15 W and USB-C 100 W. No 12 V car outlet is listed.”
Anker SOLIX S5000 product page, ankersolix.com/s5000 (published 2026-10-09) · 2026-10-09 · [neutral]
- B1
“A whole-home system: one EP900 inverter provides up to 9,000W (18,000W with two units), enough to run a washer, dryer, heater, and refrigerator.”
bluettipower.com / bestgeneratorsolar.com — EP900 + B500 guide · 2026 · [positive]
- B2
“With B500 batteries (4,960Wh each), capacity expands from 9.9kWh up to about 39.6kWh with eight B500 modules — weeks of essential backup.”
bluettipower.com / mightygenerators.com — EP900 + B500 · 2026 · [positive]
- B3
“A fast UPS switches from grid to battery within 10 milliseconds; one owner reported the transfer is completely unnoticeable during outages.”
bgr.com / owner review — EP900 + B500 · 2026 · [positive]
- B4
“Built on reliable LiFePO4 cells; tied to solar, an owner said they can virtually go off-grid and minimize utility bills. Complete systems run roughly $14,500-$15,000 excluding installation.”
bgr.com / offgridsource.com — EP900 + B500 review · 2026 · [positive]
Research compiled October 9, 2026.
Who Should Buy Which
Buy the SOLIX S5000 if you…
- →You want whole-house-scale backup without an installer, and you'd like the same box to roll out to a campsite or a driveway project when the power is on.
- →Your outages last a night or two, and you'd rather spend the difference on panels or a BP5000 pack than on a hardwired cabinet.
- →You need 240 V for a well pump or a dryer through a twist-lock plug and would rather not commit the wall space to a permanent system.
Buy the EP900 + 2×B500 if you…
- →You are building a permanent home system, want it wired into a subpanel so nothing needs plugging in when the grid drops, and value ten years of warranty on that investment.
- →You face multi-day winter outages with little sun, where 9,920 Wh and a 9,000 W solar ceiling outlast what one S5000 can hold.
If neither fits
If all you need is the fridge, some lights and phones through an evening outage, close this tab. A 2 kWh-class portable covers that for a small fraction of either price.
The Bottom Line
Same 6,000-cycle rating, half the cost per watt-hour, and one expansion pack between the S5000 and this BLUETTI's capacity. That is the whole case for the Anker, and it holds unless what you actually want is the installed version, with the panel wiring and the decade of warranty that come with it.
If that's you, the EP900 is a good system and worth its premium. If it isn't, buy the S5000 and spend the difference on panels.
Frequently Asked Questions
Answers drawn from the spec record and cited owner research.
Is the BLUETTI EP900 with two B500 batteries worth it over the Anker SOLIX S5000?
Only if you want an installed system. Both batteries are rated for 6,000 cycles, and the S5000 works out at $0.08 per lifetime kWh against the BLUETTI's $0.17. The BLUETTI's extra money buys hardwiring, a higher continuous output and 10 years of warranty against 5.
Can the Anker S5000 match the EP900 + 2×B500's capacity?
Yes, with one expansion pack. A single BP5000 adds 5,024 Wh, taking the S5000 to 10,048 Wh against the BLUETTI's 9,920 Wh. Our record doesn't carry a BP5000 price, so price that pack before you compare totals.
How long will each one run my house in a blackout?
Both clear an eight-hour outage on our standard household load with room to spare. Afterwards the S5000 has about 1.6 more nights like it in reserve and the BLUETTI about 4.1, so the BLUETTI is the one for long outages with no way to recharge.
Does the Anker S5000 need an electrician like the EP900?
Not to use it. The S5000 has its own outlets, including four 20 A household sockets, a TT-30R and a 240 V L14-30R, so it works as a plug-in unit. Feeding your home's circuits from it still calls for a proper inlet and transfer switch, while the EP900 is installed at the panel from the start.
Where to buy
Anker SOLIX S5000Pick
$2,499.99
$2,499.99 · direct from Anker
BLUETTI EP900 + 2×B500
$10,298.00
$10,298.00 · direct from BLUETTI
Last checked 28 days ago. Prices move — check before you buy.
Prices may vary by retailer and are subject to change.