Head-to-head test
Anker SOLIX S5000 vs BLUETTI Apex 300 + 2×B500K
The BLUETTI stack's 13,004.8Wh outgrows its own 2,400W of solar input, so unless you need days of runtime with no sun and no grid, the cheaper S5000 is the better start, with more output and a route to more battery later.
Full profiles: Anker SOLIX S5000 → · BLUETTI Apex 300 + 2×B500K →
Written by Gunner GustafsonUpdated
Whole-Home Backup Tester, Station Arena Test Desk
Spec deltas
The Apex 300 + 2×B500K holds 13,004.8Wh, about 2.6 times the S5000's 5,024Wh, and costs $2,899 more. It also weighs 282.2 lb across three boxes, and its inverter is the same 3,840W unit you'd get with no expansion batteries at all.
So this isn't a bigger version of the same machine. It's a battery bank with a modest inverter and a modest solar input attached. The S5000 is the opposite shape: less storage, but 4,500W of output and 3,000W of solar input in one 97 lb cabinet on wheels.
We'd start with the S5000 and add batteries if the first winter proves you need them. Buy the BLUETTI stack only if you already know your outages are measured in days.
What the Numbers Reveal
Each conclusion stated first — the numbers behind it on one line, the full analysis below.
solar input
Real panels on a winter day deliver well under their rating, which turns 5.4 ideal hours into more daylight than December has. Once drained in a long outage, the stack's capacity can't all come back from the sun, so it works as a large reserve that runs down slowly. The S5000 actually cycles: it empties, refills by afternoon and goes again.
Apex 300 + 2×B500K: 13,004.8Wh, 2,400W solar inputS5000: 5,024Wh, 3,000W solar input
Why it mattersIf solar is how you plan to get through a long outage, the S5000's faster refill keeps up better than the bigger bank.
cost / lifetime kWh
You're paying to run the same loads for longer, not to run more loads. That's exactly right for a household riding out a week-long grid failure on the fridge, the furnace fan and the lights. It's poor value for one whose problem is starting the dryer while the well pump runs, which the S5000 handles better at a fraction of the outlay.
Apex 300 output: 3,840W, whatever the battery countS5000 output: 4,500Wlifetime cost: $0.07 vs $0.08 per kWh
Why it mattersDecide whether your outages are long or heavy; long favors the BLUETTI, heavy favors the S5000.
Capacity
That turns the decision into one about timing. Buying 13kWh up front means paying for capacity before you know you need it; starting at 5,024Wh lets a real outage tell you. Our record carries no price for the BP5000 yet, so we can't say which route costs less in total, only that the S5000 doesn't lock you out.
S5000 accepts up to five BP5000 packs of 5,024Wh eachA6Apex 300 + 2×B500K: 13,004.8WhS5000 + two BP5000: 15,072Wh (5,024 × 3)
Why it mattersUnsure how much you need? Start with the S5000 and let your first long outage decide.
The specific dimensions that decide these two units — everything else is a tie.
Growth Path
Selected because: Both expand, and the S5000 with two expansion packs would pass this stack's 13,004.8Wh, so buying all the capacity up front is a choice, not a necessity.
solar input
The Apex stack is already grown. The S5000 starts small and connects up to five BP5000 packs through a 400V DC port, each 5,024Wh, for 30,144Wh in totalA6. Nobody needs thirty kilowatt-hours to ride out a storm; the point is that the ceiling sits well above anything this BLUETTI stack offers.
The catch is that our record doesn't price the BP5000 yet, so the cost of growing the S5000 to match is an open question. Buy the S5000 for what it is today, and treat the expansion as an option, not a plan.
Runtime: Will It Power Your Gear?
Selected because: The BLUETTI stack holds about 2.6 times the energy; this is where that's worth paying for and where it isn't.
continuous output
After an 8-hour blackout the BLUETTI still has 9,409Wh, 5.7 more nights like it; the S5000 has 2,625Wh, 1.6 more. For a week without power and without sun, that's the difference between coping and rationing. For the usual outage, gone by the next afternoon, both are far beyond what you'll use.
Lifetime Value
Selected because: The stack wins on lifetime cost per kWh, $0.07 against $0.08, but only if you actually cycle all 13,004.8Wh.
cost / lifetime kWh
Both are rated for 6,000 cycles, and the BLUETTI comes out at $0.07 per lifetime kWh to the S5000's $0.08. That figure assumes you use the whole battery every cycle. A 13kWh bank that spends most of its life at full, waiting for the next outage, never gets near that number, and its larger up-front price is real money from day one.
Portability & Form Factor
Selected because: 282.2 lb in three boxes against 97 lb on wheels: one is an installation, the other a machine you can move.
weight
Strengths & trade-offs
Anker SOLIX S5000
Strengths
- +Costs $2,899 less
- +Lighter by 185.2 lb
- +Higher AC output
- +Faster solar charging
Trade-offs
- –Very heavy unit that may be difficult for one person to lift.
BLUETTI Apex 300 + 2×B500K
Strengths
- +Larger battery capacity
Trade-offs
- –Substantially more expensive (+$2,899) than the SOLIX S5000.
- –Significantly heavier (+185.2 lbs), making it harder to move.
- –Weaker inverter (-660W) limits appliance compatibility.
- –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 Apex 300 + 2×B500K at 282.2 lbs is not a take-along — it rolls off a truck bed if it travels at all, 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 Apex 300 + 2×B500K'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
Apex 300 + 2×B500K
Both survive the night. The Apex 300 + 2×B500K finishes at 15% used with 9,409Wh left — 5.7 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 Apex 300 + 2×B500K's 45dB. 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
Apex 300 + 2×B500K
The Apex 300 + 2×B500K clears the workday at 8% used, banking 10,144Wh — 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 Apex 300 + 2×B500K at 282.2 lbs is not a take-along — it rolls off a truck bed if it travels at all, 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 Apex 300 + 2×B500K'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
Apex 300 + 2×B500K
The SOLIX S5000 doesn't finish — 4,270Wh usable against the 4,685Wh this needs leaves it 415Wh short, about 91% of the scenario covered (its nameplate 5,024Wh actually clears this — the flat 15% conversion allowance is what tips it under). The Apex 300 + 2×B500K covers it with 6,369Wh to spare.
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: Apex 300 + 2×B500K runs 53.9h vs 20.8h.
$5,399 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 0–736.9hComfort & Convenience
Makes off-grid life actually enjoyablescale 0–147.4hHigh-Draw Appliances
These reveal the real limitsscale 0–11.1h¹ 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 SOLIX S5000
Start with the S5000. The Apex 300 + 2×B500K costs $2,899 more and buys duration, not power: its output stays at 3,840W however many batteries sit under it, while the S5000 runs 4,500W from a single 97 lb cabinet. If you later find 5,024Wh isn't enough, Anker's BP5000 packs add 5,024Wh each, and two of them would pass the BLUETTI's total. The BLUETTI wins outright for one buyer: the household that already knows its outages run for days with no sun and no grid, where 9,409Wh still in reserve after a blackout night is the point. Confidence is 5, because that buyer exists and because the S5000 has only Anker's documentation behind it so farA0.
Today the Apex 300 + 2×B500K is $4,399, $1,000 under its typical $5,399. The verdict weighs typical prices, not today's. Prices checked 28 days ago.
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 Apex 300 + 2×B500K price$4,399.00 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:Apex 300 + 2×B500K $4,999
The lowest we have recorded. A Black Friday price above it is a sale this unit has already had.
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 Apex 300 + 2×B500K rates 3.5/5 (14th 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 Apex 300 + 2×B500K (282.2 lbs) is spread across its boxes — no single lift, but nothing you reposition on a whim. That's a 185 lb difference, and it is paid once — getting the heavier one into position, not every time you move it.
Apex 300 + 2×B500K: 45dB Published
45dB is about as loud as a running refrigerator. 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: No Difference
Both units carry the same 5-year warranty, so coverage isn't a tiebreaker here. The Apex 300 + 2×B500K's figure is a maximum rather than a guarantee — it depends on buying direct from BLUETTI or registering the unit, since reseller purchases carry a shorter term. Worth saying because the per-dollar framing can suggest otherwise: the SOLIX S5000 works out at 2 years of cover per $1,000 spent against the Apex 300 + 2×B500K's 0.9, but that spread is the price gap, not the terms.
Full record above — the Test Desk pick is the SOLIX S5000.
Check SOLIX S5000 price →or check the Apex 300 + 2×B500K 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 is cheaper to buy, but the Apex 300 + 2×B500K is cheaper to own. At $0.07/kWh over its lifetime vs $0.08/kWh, the Apex 300 + 2×B500K's higher cycle life and capacity make each dollar go further over the years. 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
One cabinet that does 120V and 240V split-phase, with UL 9540 and UL 9540A listing and a single expansion path rather than a set of hubs.
Worth knowing
SOLIX support is less reliable than Anker's name implies, and shipping a heavy battery back is a hazmat-freight job, so returns take time.
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
Customer support inconsistency is the #1 risk factor. Older/discontinued units may become unrepairable — no spare parts policy for some models. Some reports of erratic communication from support agents.
Analyst note
BLUETTI builds big systems from parts, with hubs for USB, parallel boxes and expansion batteries, and support that varies with where you bought. Anker keeps more in the one box. Neither brand's support is a reason on its own to choose, but BLUETTI's is the bigger variable.
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.
Apex 300 + 2×B500K
EXPANDABLESupports BLUETTI expansion batteries, so you can add capacity later without replacing the base unit — useful if your needs may climb past 13,005Wh.
Accepts up to 2,400W of solar. Enough for a serious multi-panel array.
Generous port selection supports complex multi-device setups.
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, so neither locks you out of growth — decide on capacity, price, and the rest, not the expansion checkbox.
What Owners Report
Patterns from published owner reports and long-term reviews — every claim cited to its source below.
Anker SOLIX S5000
The S5000's record is Anker's documentation and nothing else yet: the label and product page establish the 5,024Wh pack, the 3,000W of solar across two inputs, and expansion to five BP5000 packs over a 400V DC portA1A5A6. Runtime and lifespan figures are Anker's internal testing, and no one has independently tested itA0.
“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 Apex 300 + 2×B500K
Field coverage of this three-box configuration is very thin, and most reviews tested the Apex 300 with the older B300K rather than the B500KB0. One owner in BLUETTI's forum bought an Apex 300 with a B500K to power a 50A fifth-wheel RVB10, which is the kind of stationary, high-draw home this stack suits.
Reviewers consistently note the base unit has no USB or DC ports and that the Hub D1 adding them runs about $300B2B6, and one priced the Hub A1 parallel box for linking units at around $699B7. One found the app a little sluggish next to Anker'sB3. On the plus side, one reviewer ran essentials for more than a full day without rationingB8. Most of these entries can't be tied to this exact configurationB0.
“Some units sound like small jet engines under load, but the Apex 300's fans are relatively tame.”
Sources
techspective.net · thesolarlab.com · t3.com · trustedreviews.com · notebookcheck.net · bluettipower.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]
- Reviewers consistently note the lack of built-in USB/DC ports, requiring a separate $300 Hub D1 accessory, as a notable and costly design compromise. [Apex 300 + 2×B500K · 3 entries]
- The unit's extreme weight (~85 lbs base, more with expansion batteries) makes it effectively immobile once placed, despite being marketed as 'portable.' [Apex 300 + 2×B500K · 3 entries]
- The modular ecosystem (Hub A1, Hub D1, expansion batteries) is praised for flexibility but criticized for high add-on costs relative to competitors. [Apex 300 + 2×B500K · 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]
- 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]
- 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]
- B2
“Not having DC or USB ports on the face is a tradeoff. The Hub D1 solves the problem—but it's an additional $300 accessory that you then have to bolt on after the fact.”
techspective.net — Bluetti Apex 300 with B300K Review · 2025-09 · [negative]
- B3
“The Bluetti app is still a little sluggish compared to the EcoFlow or Anker apps, but it lets you toggle power modes, monitor stats, and tweak settings from a distance.”
thesolarlab.com — Bluetti Apex 300 Review · unknown · [mixed]
- B4
“In fact, it's so heavy I can hardly carry it more than a few feet at a time and have been unable to lift it onto a table”
t3.com — Bluetti Apex 300 review · 2025-11 · [negative]
- B6
“That Bluetti D1 Power Hub that gives you your DC and USB ports costs about $300, which is a steep price for what you're getting.”
thesolarlab.com — Bluetti Apex 300 Review · unknown · [negative]
- B7
“Say you want to connect multiple Apex 300 power stations together, you'll need to buy the Bluetti Hub A1 Parallel Box, which retails for around $699!”
thesolarlab.com — Bluetti Apex 300 Review · unknown · [negative]
- B8
“With some portable power stations, I'd have to ration power more carefully, but with this system, I could run essentials for more than a full day if I needed to.”
techspective.net — Bluetti Apex 300 with B300K Review · 2025-09 · [positive]
- B10
“I recently purchased a Bluetti Apex 300 with a B500K expansion battery to help power our 50A Brinkley 5th wheel.”
BLUETTI Community forum — 'Apex 300 operating mode and settings?' · 2026-02 · [positive]
- B11
“No wheels though, so if you plan on moving it regularly, invest in a cart.”
thesolarlab.com — Bluetti Apex 300 Review · unknown · [negative]
Research compiled October 9, 2026.
Who Should Buy Which
Buy the SOLIX S5000 if you…
- →The homeowner who isn't sure yet how much battery they need, and would rather learn from one real outage before buying 13kWh.
- →The household with a solar array that wants a battery it can drain and refill in a single day.
- →Anyone whose problem is big loads at once, a 240V pump plus the kitchen, more than long hours.
Buy the Apex 300 + 2×B500K if you…
- →The rural household that loses power for days at a stretch in winter, with short daylight and no generator.
- →The fifth-wheel or cabin owner who wants one large bank installed permanently and never moved.
If neither fits
If what you really want is whole-home backup wired into the panel for a week, look at a hardwired home battery system with a transfer switch. Neither portable is the cleanest way to run a house for days.
The Bottom Line
The Apex 300 + 2×B500K is a very large tank behind a 3,840W inverter and a 2,400W solar input; you pay $2,899 more for hours, not power, and the sun can't fill it in a winter day. The S5000 runs more at once, refills faster, rolls on its own wheels, and can grow past the BLUETTI later if a real outage proves you need it. Start with the S5000, unless you already know your outages last for days.
Frequently Asked Questions
Answers drawn from the spec record and cited owner research.
Do I need 13kWh of battery backup?
Probably not to start. On our 8-hour blackout profile the S5000's 5,024Wh still has 2,625Wh left in the morning, about 1.6 more nights like it. The Apex 300 + 2×B500K's 13,004.8Wh is for outages measured in days without sun or a generator.
Can the Anker S5000 expand to match the Apex 300 + 2×B500K?
Yes. It takes up to five BP5000 packs of 5,024Wh each, and two of them bring it to 15,072Wh, more than the BLUETTI stack's 13,004.8Wh. Our record has no BP5000 price yet, so we can't compare the total cost.
How long does solar take to refill each one?
In full-rated sun, about 1.7 hours for the S5000 (5,024Wh at 3,000W) and about 5.4 hours for the Apex 300 + 2×B500K (13,004.8Wh at 2,400W). Real panels are slower, so the BLUETTI stack often can't refill completely on a short winter day.
Does adding B500K batteries give the Apex 300 more power?
No. Expansion batteries add hours, not watts: the Apex 300 stays at 3,840W continuous whether it has one battery or three. The S5000 is rated 4,500W, so it runs more at once despite the smaller battery.
Where to buy
Anker SOLIX S5000Pick
$2,499.99
$2,499.99 · direct from Anker
BLUETTI Apex 300 + 2×B500K
$4,399.00
$4,399.00 · direct from BLUETTI
down from $5,399 · 19% below usual
Last checked 28 days ago. Prices move — check before you buy.
Prices may vary by retailer and are subject to change.