Head-to-head test
Anker SOLIX S2000 vs BLUETTI EP500Pro
The EP500Pro carries two and a half times the battery and twice the sustained output, and for most buyers it's still the wrong answer, because 187 lbs on a garage floor and 35.7 lbs in a trunk solve different problems.
Full profiles: Anker SOLIX S2000 β Β· BLUETTI EP500Pro β
Written by Gunner GustafsonUpdated
Whole-Home Backup Tester, Station Arena Test Desk
Spec deltas
Buy the SOLIX S2000. It runs $700, weighs 35.7 lbs against 187, and over its rated life it will move more energy than the bigger machine does: 20,096 kWh against 17,920, because 10,000 cycles of a 2,010Wh pack beats 3,500 cycles of a 5,120Wh one. The battery with 39% of the capacity outlasts the other by enough to come out ahead on the only capacity figure that covers a decade. The EP500Pro has also left BLUETTI's range: the store has shown it sold out since July 2026, so this page prices only the S2000.
The EP500Pro's case is real and it is narrow. Its 3,000W rated output runs loads the S2000's 1,500W simply refuses, and in the eight-hour blackout we model it finishes at 38% used with 2,707Wh banked while the S2000 finishes at 96% holding 63Wh, about four percent of a second night. If your outages routinely run past one evening, that is not a rounding difference. That is the whole argument.
Which is another way of saying these two are barely competitors. One is 35.7 lbs of trunk and campsite. The other is a 187 lb appliance that reviewers call essentially immovable without its wheels, needing two fit people to get it upstairsB7B11. Work out which of those you are shopping for and most of this page resolves itself.
What the Numbers Reveal
Each conclusion stated first β the numbers behind it on one line, the full analysis below.
rated cycles
Set that against price and only one side of the sum still exists: three cents a lifetime kilowatt-hour on the S2000, and no figure for the EP500Pro, because BLUETTI no longer sells it. Whatever a leftover unit asks, it delivers fewer kilowatt-hours in total than the smaller box.
SOLIX S2000: 2,009.6Wh rated for a minimum 10,000 cyclesEP500Pro: 5,120Wh rated for a minimum 3,500 cyclesLifetime energy: 20,096 kWh for the S2000, 17,920 kWh for the EP500Pro
Why it mattersAnyone reaching for the EP500Pro because a bigger battery feels like the more durable investment has it backwards. Buy it for what it does on one bad night, not for what it saves over ten years.
solar input
Stack that on the overnight reserve and the multi-day outage stops being a close call. The EP500Pro wakes up with a night and a half still in the bank and tops up by lunch. The S2000 wakes up empty and spends the whole solar day earning back one more evening. An outage does not schedule itself, and recharge speed is a survival spec rather than a convenience one.
EP500Pro accepts 2,400W of solar input against the S2000's 400WCapacities are 5,120Wh and 2,009.6WhAfter the eight-hour blackout the EP500Pro holds 2,707Wh and the S2000 holds 63Wh
Why it mattersIf you are buying for grid failures measured in days, this is the one axis where the EP500Pro's bulk earns itself, and it is the reason this verdict is confident rather than emphatic.
continuous output
Look at where the EP500Pro actually wins and both victories are capacity wins, not output wins: the blackout and the workday are settled by watt-hours in the pack, not watts through the inverter. The 3,000W inverter only pays for itself on loads nobody here is running, like a well pump, a space heater, or a microwave and a kettle at the same time.
S2000 is rated 1,500W sustained with a 3,000W published peakEP500Pro is rated 3,000W sustained with a 6,000W published peakThe heaviest peak any of the six modelled scenarios asks for is 400W, at the tailgate
Why it mattersIf your list is a fridge, a CPAP, lights, a router and laptops, you will never touch the S2000's ceiling, and the EP500Pro's inverter is money sitting idle.
Only one of these units has evidence attached. Two independent hands-on tests found the S2000 silent at idle with fans spinning only under heavy load or the fastest charging modeA1A2, and its transfer rating held up in a simulated outage where connected office equipment never droppedA9. The EP500Pro has a single reviewer calling its fan very quietB6 and no published figure behind that, which the researcher flagged as a thin spot in the recordB0.
CPAP Overnight is the one scenario both units win outright, at 19% used against 7% of a 320Wh loadS2000 is rated no worse than 10ms transfer; EP500Pro no worse than 20msThe S2000 publishes a 30dB figure; the EP500Pro publishes no noise figure at all
Why it mattersFor the person sleeping beside the unit, the S2000 is the one you can check before you buy. The EP500Pro asks you to take one reviewer's word for it.
The specific dimensions that decide these two units β everything else is a tie.
Portability & Form Factor
Selected because: 35.7 lbs against 187 is the difference between a unit that travels with you and one that picks a room and stays in it. Everything below is downstream of that.
weight
187 lbs is not a heavy power station, it is a category. Reviewers describe the EP500Pro as essentially immovable without its wheels, with two fit people still struggling to get it upstairsB7B11, which means it gets installed once and lives where you put it. The S2000's 35.7 lbs is an ordinary two-hands lift, and reviewers at two different outlets independently griped that it lacks a proper carry handle, one of them asking for a second handle specifically for stairsA7A8. That complaint tells you how close it sits to genuinely grab-and-go.
You are not giving up much connectivity to save the weight either. Five AC outlets on each unit, two USB-C ports on each, both topping out at 100W. The EP500Pro adds a second USB-A and a 12V car port that our record does not list for the S2000. The practical test is a staircase: if the unit ever has to go down one to reach a basement or up one after a camping trip, the EP500Pro has already failed and the S2000 has not. If it will live on one floor forever, weight costs you nothing and you can skip this section.
Lifetime Value
Selected because: The smaller unit delivers more total energy over its rated life, 20,096 kWh against 17,920, which is the figure that reframes the whole capacity gap.
Three cents a lifetime kilowatt-hour on the S2000. The EP500Pro gets no figure of its own, because BLUETTI no longer sells it and this page shows it no price. What survives is the energy side of the sum: better ports, a bigger inverter, a nicer app, stack all of them and the EP500Pro still delivers less total energy across its rated life than the smaller box.
The arithmetic behind it is unglamorous and hard to argue with. A cycle on the S2000 carries 2,010Wh and it is rated for at least 10,000 of them. A cycle on the EP500Pro carries 5,120Wh and it is rated for at least 3,500. Multiply and the small unit wins on lifetime energy, 20,096 kWh against 17,920. Whatever a leftover EP500Pro is worth, it is not worth it as an investment in cheap electricity. It is worth it as a machine that does something the S2000 cannot on the night you need it.
Your Life, Your Pick
Selected because: Two of the six go to the EP500Pro on capacity, one to the S2000 because the EP500Pro cannot get there, one is a dead heat, and two defeat both units. Read for which one is your week.
The EP500Pro's two wins are the same win twice: it has more battery. The eight-hour blackout leaves it at 38% used with 2,707Wh banked, good for 1.6 more nights like it. The remote workday leaves it at 21% with 3,442Wh in hand. The S2000 clears both, but the blackout leaves it 63Wh, four percent of a second night. One of these wakes up with a reserve and the other wakes up empty.
The tailgate goes the other way for a reason that has nothing to do with power: the S2000 can get there, covering the 670Wh with 1,038Wh to spare and never noticing the 400W peak. And the two scenarios nobody wins are more useful than the four that somebody does. A camping weekend asks 2,100Wh and the S2000 covers about 81% of it. Van life asks 4,685Wh and even the EP500Pro lands 333Wh short once the flat 15% usable-energy allowance this site applies to every unit is taken off the nameplate. If either of those is your real use, the honest answer is that this page has the wrong two units on it.
What the Specs Don't Tell You
Selected because: Five cautions fire here. The ones that change a decision are the weight, the two different UPS transfer classes, and the fact that only one of these units publishes a noise figure.
rated cycles
The transfer ratings are the sharpest of the five cautions, and they are ratings rather than stopwatch results: no worse than 10ms on the S2000, no worse than 20ms on the EP500Pro. One reviewer did run a simulated outage with office equipment attached and watched nothing dropA9, which is the closest either unit comes to evidence here. If the thing you are protecting is a desktop with unsaved work, that class difference is worth more attention than the capacity gap. If it is a router, it is worth nothing at all.
The warranty card will tempt you into a per-dollar reading, so ignore that line. Both units carry five years, the EP500Pro's conditional on buying direct from BLUETTI or registering the unit, and with no price on the EP500Pro any more there is no per-dollar spread to read, only the same five years on each side. The noise card is the one worth sitting with: the S2000 publishes 30dB, a spec-sheet best case of the kind most makers print rather than a measurement under load, and the EP500Pro publishes nothing. An absence is not an accusation. It just means there is no figure to hold it to.
Brand Trust
Selected because: Both units carry five years of cover, so you will be on terms with a support department for a long time. The two brands differ more here than they do on the spec sheet.
Five years is a long time to be on email terms with a support department. BLUETTI's is the inconsistent one in this category, heavily email-based across a China timezone gap, and the EP500Pro has a cautionary tale attached: a second-hand unit threw error code 006, would not charge or power any port, and BLUETTI declined support because the owner was not the original buyerB10. Customer service is also described as simply hard to reachB4. On a 187 lb machine you cannot casually box up and ship, that combination is worth pricing in.
Anker's is the better reputation and it is trending the wrong way on the SOLIX line specifically, with AI-driven first responses and awkward hazmat return logistics on heavy units. Neither support profile is a reason to pick a unit on its own. Both are a reason to buy direct and register on day one, whichever box ends up in your house.
Strengths & trade-offs
Anker SOLIX S2000
Strengths
- +Lighter by 151.3 lb
- +Rated for 10,000 charge cycles β much longer battery lifespan
Trade-offs
- βWeaker inverter (-1,500W) limits appliance compatibility.
BLUETTI EP500Pro
Strengths
- +Larger battery capacity
- +Higher AC output
- +Faster solar charging
Trade-offs
- βSignificantly heavier (+151.3 lbs), making it harder to move.
- βVery heavy unit that may be difficult for one person to lift.
- βShorter-lived battery β rated for 3,500 charge cycles vs the SOLIX S2000's 10,000, so it wears out sooner.
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 Β· 2 nights Β· needs 2,100Wh
Weekend Camping
Two nights off-grid with essential comfort
Neither unit
2,100Wh is the ask, and it beats both units for opposite reasons. The S2000 gets to the campsite and then runs dry 392Wh from the end of the weekend. The EP500Pro has 2,252Wh to spare and weighs 187 lbs, so it is not going. Bring the S2000 and a panel, or bring less fridge.
Battery budget usedlower = more headroom
LOADΒ Β Phone Charger 15WΓ6h Β· LED Lights 40WΓ8h Β· Box Fan 75WΓ14h Β· CPAP Machine 40WΓ16h
SCN-02 Β· 8 hours Β· needs 1,645Wh
8-Hour Blackout
Keep the essentials running through a night without power
EP500Pro
Both make it to morning. Only one wakes up with anything left. The EP500Pro ends the night at 38% used with 2,707Wh banked, good for 1.6 more nights like it. The S2000 ends at 96% holding 63Wh, four percent of a second night. If your outages are single evenings that difference is free. If they run longer it is the entire decision.
Battery budget usedlower = more headroom
LOADΒ Β Fridge 150WΓ8h Β· Router + Modem 20WΓ8h Β· LED Lights (4 bulbs) 40WΓ6h Β· Phone Charger 15WΓ3h
SCN-03 Β· 8 hours Β· needs 320Wh
CPAP Overnight
Sleep therapy without interruption β the #1 medical use case
Either unit
A CPAP asks about 40W for eight hours, which is 19% of the S2000 and 7% of the EP500Pro. Capacity has nothing to say here, so it comes down to what is sitting beside your bed at 3 a.m., and only one of these two publishes a noise figure at all. Call it a dead heat on the numbers and break it on weight, availability, and whether you can live with a fan you have never heard.
Battery budget usedlower = more headroom
LOADΒ Β CPAP Machine 40WΓ8h
SCN-04 Β· 8 hours Β· needs 910Wh
Remote Workday
Full work day off-grid without power anxiety
EP500Pro
910Wh across a working day with nothing in it pulling more than 60W. The EP500Pro finishes at 21% used with 3,442Wh in hand; the S2000 finishes at 53% with 798Wh, a comfortable day's slack of its own. Both get you to five o'clock. The EP500Pro's win here is really about the second and third day, not this one.
Battery budget usedlower = more headroom
LOADΒ Β Laptop 60WΓ8h Β· External Monitor 30WΓ8h Β· Router + Modem 20WΓ8h Β· Phone Charger 15WΓ2h
SCN-05 Β· 4 hours Β· needs 670Wh
Tailgate Party
Game day power for the crew
SOLIX S2000
The S2000 wins this by showing up, then earns it anyway: it covers the 670Wh with 1,038Wh to spare and the 400W peak never troubles it. The EP500Pro has energy it will never get to use, because 187 lbs does not make the walk from the parking space. Capacity was never the question at a tailgate.
Battery budget usedlower = more headroom
LOADΒ Β Blender 400WΓ0.5h Β· LED TV (55") 80WΓ4h Β· Bluetooth Speaker 15WΓ4h Β· Phone Charger (Γ3) 45WΓ2h
SCN-06 Β· 24 hours Β· needs 4,685Wh
Van Life Daily
A full day of mobile living β the ultimate endurance test
Neither unit
4,685Wh a day is more than either of these holds. The S2000 covers about 36% of it. The EP500Pro comes 333Wh short, which is the interesting part: its 5,120Wh nameplate would clear the load, and it is the flat 15% usable-energy allowance applied to every unit on this site that tips it under. Treat both as partial cover, enough for the essentials on that list rather than the list.
Battery budget usedlower = more headroom
LOADΒ Β Mini-Fridge 150WΓ24h Β· Laptop 60WΓ4h Β· Phone Charger 15WΓ3h Β· LED Lights 40WΓ5h Β· Fan 75WΓ8h
The Load Test
RUNTIME = (Wh Γ 0.85) Γ· 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: EP500Pro runs 21.2h vs 8.3h.
Planning for more than this? Describe your whole setup and get it sizedΒ β
Modeled from the spec record β same math as the tables below. Methodology
Runtime by appliance
Real-world runtime estimates for common appliances, modeled at 85% inverter efficiency.ΒΉ
Essentials
The basics you need runningscale 0β290.1hComfort & Convenience
Makes off-grid life actually enjoyablescale 0β58hHigh-Draw Appliances
These reveal the real limitsscale 0β4.4hΒΉ Runtime = (capacity Γ 0.85) Γ· 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 β see methodology.
Conclusion
November 1, 2026
Verdict: the Anker SOLIX S2000
Buy the SOLIX S2000 unless you have a specific reason not to, and there are exactly two of those. BLUETTI's store has had the EP500Pro sold out since July 2026, so this page shows it no price, and the S2000 would win a live matchup anyway: it weighs 35.7 lbs against 187, and across its rated life it delivers more total energy than the unit with two and a half times the battery, 20,096 kWh against 17,920, at three cents a lifetime kilowatt-hour. The EP500Pro is the higher-scoring machine and deserves to be, with 5,120Wh, 3,000W sustained, and a 2,400W solar input that refills the entire pack in roughly two hours at its rated figure. If your outages run days rather than evenings, or something in your house draws more than 1,500W, that is the shape of unit you are buying and the S2000 genuinely cannot stand in for it. BLUETTI's current pairing in that role is the Apex 300 + B300K. Everyone else should take the lighter, longer-lived box and stop reading.
Editor-assigned confidence, based on cited owner research and spec analysis.
List prices as of November 1, 2026. The links below open Anker's current price.
$699.99 Β· direct from Anker
Last checked 28 days ago. Prices move β check before you buy.
Written by Gunner Gustafson, Whole-Home Backup Tester Β· Station Arena Test Desk Β· Updated November 1, 2026
Black Friday Β· 26 days out
Price to beat:SOLIX S2000 $650
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): UPS, CPAP, Solar Generator, Tailgating, Food Truck, Apartment Balcony, Camping.
Full specifications
α΅ Derived: price Γ· rated capacity. See the data behind our comparisons β
Comparison ToolAdd more power stations, side by sideOpen Tool βHow these numbers are produced
Numeric verification
Every figure on this page traces to our spec database or arithmetic on it β no estimated numbers.
Owner claims
Statements about owner experience are cited to published reviews β see Sources & Research Notes below.
Runtime model
Runtime = (rated capacity Γ 0.85 inverter efficiency) Γ· 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 βClass ranking (the star rating)
Each unit's star score is a category ranking, not customer reviews β 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 5β . Here, SOLIX S2000 rates 5.0/5 (99th percentile of 28 Large-class units), and EP500Pro rates 3.5/5 (11th percentile of 20 Home Backup-class units).
How the class ranking is computed βTest Notes & Caveats
Hidden gotchas and advantages we spotted that you won't find on the product page.
187 lbs Picks a Room and Stays In It
This is the spec that decides the page. 187 lbs is not a heavy power station, it is a stationary appliance: getting it into a vehicle is a project, getting it down basement stairs is a bad idea, and you will choose its spot exactly once. The S2000's 35.7 lbs is an ordinary two-hands lift you can do in a hallway. That single difference is why one of these can go to a campsite and the other cannot, and it settles more of this comparison than capacity does.
No Worse Than 10ms, No Worse Than 20ms
Both of these are ceilings a manufacturer publishes rather than stopwatch times, so read them as classes. The S2000's rating is the safer class for a desktop PC holding unsaved work. The EP500Pro's sits right at the line the fussiest computer power supplies care about and is comfortably fine for routers, modems and ordinary consumer electronics. If what you are protecting is a computer mid-document, that gap is worth more than it looks. If it is a router, it is worth nothing.
Warranty: No Difference
Both units carry the same 5-year warranty, so coverage isn't a tiebreaker here. The EP500Pro's figure is a maximum rather than a guarantee β it depends on buying direct from BLUETTI or registering the unit, since reseller purchases carry a shorter term.
The Smaller Pack Moves More Energy
A minimum 10,000 cycles against 3,500 is the headline, but the useful version is what those cycles carry. A cycle is 2,010Wh on the S2000 and 5,120Wh on the EP500Pro, and multiplied out that is 20,096 kWh of lifetime energy against 17,920. The smaller battery delivers more of it. In years the ratings work out to 27.4 against 9.6 at daily use, or 96 against 34 at weekends. Neither figure is a death date: at the cycle limit the pack settles to about 80% of its original capacity and keeps working.
Only One of These Puts a Number on It
The S2000 publishes 30dB and the EP500Pro publishes nothing. That is not evidence the BLUETTI is louder, it is an absence, and the honest reading is that there is no figure to hold it to. The 30dB is not much firmer: it is a spec-sheet best case of the kind most makers print, not a measurement taken under load. If this unit is going in a bedroom or next to a CPAP, one of the two at least makes a claim you can check. The other asks you to buy first and find out.
Full record above β the Test Desk pick is the SOLIX S2000.
Check SOLIX S2000 price βOwnership Analysis
What happens after you buy β 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
β warranty ends Β· Reaching the cycle rating means ~80% capacity remains β degraded, not dead.
Analyst note
The EP500Pro is no longer sold, so there is no price to work its cost per kWh from, and this comparison doesn't quote one. On what you can actually buy today, the SOLIX S2000 works out at $0.03/kWh over its rated life. If you already own the EP500Pro, the hardware comparison still holds: over its rated life the SOLIX S2000 delivers about 20,096 kWh and the EP500Pro about 17,920 kWh.
Brand trust
Anker
Ecosystem
Seven or eight SOLIX stations across the compact C-series and the flagship F-series, plus the X1 home energy system.
Support
US-based, and Anker's consumer-electronics history of no-hassle replacements is real. The SOLIX line is where that record is showing strain: AI-driven agents returning generic first responses, and return logistics on heavy units that involve hazmat shipping. Still the easier of these two to reach.
Community
Moderate and growing, with active subreddits riding on Anker's much larger consumer-electronics brand awareness.
App experience
Rated 4.5/5 iOS (~1,100 ratings) Β· 4.3/5 Android
Unique strength
Parent-brand trust plus genuinely strong dollars-per-watt-hour in the mid and large sizes. The S2000 is among the better buys per watt-hour in our catalogue.
Worth knowing
Firmware updates have removed features without warning, and the expansion ecosystem is thinner than EcoFlow's. The second point costs you nothing here, since neither unit on this page expands at all.
BLUETTI
Ecosystem
One of the broadest lineups anywhere, fifteen to twenty-plus models from the budget AC2A up to the flagship portable Apex 300, plus vehicle solar hubs, sodium-ion cold-weather units and balcony storage.
Support
The most inconsistent in the category. Email-based across a China timezone gap, with some buyers getting clean, efficient service and others getting weeks of runaround, offers of a discount on a new unit instead of a repair, and confusing third-party claim processes. Buying direct rather than through a reseller reliably produces the better outcome, and on this unit it also decides your warranty term.
Community
Active and growing, second only to EcoFlow in engagement.
App experience
Rated 4.5/5 iOS and Android β tied for best app experience in the category. V3.0 UI redesign was well-received.
Unique strength
Among the best capacity-per-dollar ratios available, with real industry firsts including sodium-ion cold-weather units and dual solar-plus-alternator vehicle hubs. LFP across the range, though rated cycle life varies model by model rather than tracking the range, so check the specific unit.
Worth knowing
Older and discontinued units can become unrepairable, with no spare-parts policy on some models. On a 187 lb machine you cannot casually ship anywhere, that is a risk worth pricing before you buy rather than after.
Analyst note
Both apps score well and neither community will leave you short of advice. The difference that matters on this page is what happens when something breaks: Anker is easier to reach and the unit is light enough to send back, while BLUETTI's support is a lottery and the EP500Pro weighs 187 lbs. Whichever you choose, buy it direct and register it the day it arrives.
Growth path
SOLIX S2000
FIXED CAPACITYFixed at 2,010Wh β a sealed, complete system rather than a starting point. There's no expansion port, so that figure is the ceiling: check it against your longest unplugged stretch before you buy.
Accepts up to 400W of solar. Suitable for a 1-2 panel setup.
Adequate ports for most setups, but heavy users may want a power strip.
EP500Pro
FIXED CAPACITYFixed at 5,120Wh β a sealed, complete system rather than a starting point. There's no expansion port, so that figure is the ceiling: check it against your longest unplugged stretch before you buy.
Accepts up to 2,400W of solar. Enough for a serious multi-panel array.
Adequate ports for most setups, but heavy users may want a power strip.
Realistic full solar rechargeat 70% of rated panel output β see methodology
Analyst note
Growth only counts if you can still buy in, and the EP500Pro is no longer sold (BLUETTI points owners to the Apex 300 + B300K). That leaves the SOLIX S2000: it is sealed at 2,010Wh, so buy the size that covers you now. The EP500Pro's fixed 5,120Wh still matters if you already own one, but it isn't a reason to pick it over the SOLIX S2000.
What Owners Report
Patterns from published owner reports and long-term reviews β every claim cited to its source below.
Anker SOLIX S2000
The S2000 launched in June 2026, so the entire record is weeks old rather than months, with no long-term owner reports in existence yet and what does exist coming from two outlets that ran genuine hands-on tests instead of reprinting the press kitA0. Within that limit it tested well. Both reviewers found it silent at idle with fans spinning up only under heavy load or the fastest charging modeA1A2, both separately measured single-digit-watt standby draw, about 6W with the AC ports on and unused and roughly 2W with everything disabledA3A4, and one ran a fridge and assorted kitchen gadgets for over 60 hours on a chargeA12. A wall recharge on a standard 20-amp circuit hit 80% in about 1.2 hours and full in about 1.7A5.
The complaints are small and they agree with each other. Reviewers at both outlets flagged the carry handle: 35.7 lbs is manageable but awkward without a proper grip, and one wanted a second handle for stairsA7A8. One also noticed a warm-electronics smell in a small closed office during the first several hours of sustained load, which faded after a day with no safety concernA6. The app drew praise as the more polished entry in the categoryA11. None of that is disqualifying. It is simply what a six-week-old record looks like.
βFans only spin up under real load or fast charging, and at idle the unit is silent.β
Sources
ess-news.com Β· geardiary.com
BLUETTI EP500Pro
The EP500Pro has the longer record and most of it is good. A reviewer returning to one after a year and a half found it working as it did from new with plenty of capacity leftB1. A unit pulled from roughly a year in storage still held about 49% chargeB2, then went from 50% to full in about an hour and 35 minutes on a standard 120V outletB3. Power delivery is called rock-solid and stable even at high loadB9.
The friction is support and the interface. Customer service is difficult to reachB4, the display shows no estimated runtime and washes out in direct sunlightB5, and the app will not do the arithmetic to tell you when charging finishes or let you schedule the AC and DC outputsB8. Fan-noise evidence is thin, resting on one reviewer calling the fan very quietB6 with no manufacturer figure behind it, a gap the researcher flagged directlyB0. Weight is the one thing every source agrees on: far too heavy for one person, and a struggle upstairs even for twoB7B11.
βAfter 1.5 years, the system still works superbly β there's still plenty of battery capacity, and it all seems to be operating how it did from the beginning.β
Sources
cleantechnica.com Β· freshlycharged.com Β· trustedreviews.com Β· diysolarforum.com Β· technicaltrendy.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
- Two independent hands-on reviews both found near-silent idle operation, with fans spinning up only under heavy load or the fastest charging mode. [SOLIX S2000 Β· 2 entries]
- OptiSave's low-idle-draw claim held up under independent testing, with both reviewers separately measuring single-digit-watt standby draw. [SOLIX S2000 Β· 2 entries]
- Both reviewers praised fast, reliable UPS switchover that connected electronics didn't notice. [SOLIX S2000 Β· 2 entries]
- Despite otherwise solid build quality, reviewers from two different outlets independently flagged the single/absent carry handle as awkward for one-person transport. [SOLIX S2000 Β· 2 entries]
- Reviewers repeatedly flag the EP500 Pro's 180+ lb weight as making it essentially immovable without its wheels, needing two people to shift it upstairs. [EP500Pro Β· 2 entries]
- Long-term owners report the EP500 Pro holds its charge and function well after a year-plus in storage, with minimal capacity loss. [EP500Pro Β· 2 entries]
- The app and display are called out as limited on real-time detail (no runtime estimate, no output scheduling) despite solid core power performance. [EP500Pro Β· 2 entries]
- A1
βFans only spin up under real load or fast charging, and at idle the unit is silent.β
ess-news.com β Anker Solix S2000 review: 2 kWh power station built for the long haul Β· 2026-05 Β· [positive]
- A2
βThe fans only spin up when pulling a heavy load or using the fastest charging mode β otherwise it stays very quiet.β
geardiary.com β Anker SOLIX S2000 Review Β· 2026-07 Β· [positive]
- A3
βCharged fully, disconnected from wall power with AC output enabled and no loads attached, then monitored for 10 hours: state of charge dropped only to 99%, implying about 2W average draw β matching Anker's spec.β
ess-news.com β Anker Solix S2000 review: 2 kWh power station built for the long haul Β· 2026-05 Β· [positive]
- A4
βWith AC ports on but unused, consumption is about 6W; with everything disabled it drops to just 2W.β
geardiary.com β Anker SOLIX S2000 Review Β· 2026-07 Β· [positive]
- A5
βReal-world recharge from a standard 20-amp household circuit hit 80% in roughly 1.2 hours and full capacity in about 1.7 hours, matching the manufacturer's claims.β
ess-news.com β Anker Solix S2000 review: 2 kWh power station built for the long haul Β· 2026-05 Β· [positive]
- A6
βUnder sustained AC load in a small, closed home office there was a slight warm-electronics smell within a few feet of the unit during the first several hours of operation; it faded after one day with no safety concern.β
ess-news.com β Anker Solix S2000 review: 2 kWh power station built for the long haul Β· 2026-05 Β· [mixed]
- A7
βAt 35.7 lbs the weight is manageable but noticeable β a second handle would be welcome for carrying it up stairs.β
ess-news.com β Anker Solix S2000 review: 2 kWh power station built for the long haul Β· 2026-05 Β· [mixed]
- A8
βLacks a dedicated handle for carrying with one hand, making transport less convenient despite the relatively compact 35.7 lb weight.β
geardiary.com β Anker SOLIX S2000 Review Β· 2026-07 Β· [negative]
- A9
βIn a simulated outage, connected office equipment rode through the switchover without interruption.β
ess-news.com β Anker Solix S2000 review: 2 kWh power station built for the long haul Β· 2026-05 Β· [positive]
- A11
βThe Anker app is the more polished entry in this category, with clear navigation and sensible defaults.β
ess-news.com β Anker Solix S2000 review: 2 kWh power station built for the long haul Β· 2026-05 Β· [positive]
- A12
βEasily powered a fridge and various kitchen gadgets for over 60 hours without needing a recharge.β
geardiary.com β Anker SOLIX S2000 Review Β· 2026-07 Β· [positive]
- B1
βAfter 1.5 years, the system still works superbly β there's still plenty of battery capacity, and it all seems to be operating how it did from the beginning.β
cleantechnica.com β BLUETTI EP500 Pro β 1Β½ Years Later Β· 2025-03 Β· [positive]
- B2
βPulled from storage after about a year, the unit still retained roughly 49% charge β self-discharge over that time was minimal.β
cleantechnica.com β BLUETTI EP500 Pro β 1Β½ Years Later Β· 2025-03 Β· [positive]
- B3
βAfter a long storage period, it charged from 50% to 100% in about 1 hour 35 minutes on a standard 120V outlet.β
cleantechnica.com β BLUETTI EP500 Pro β 1Β½ Years Later Β· 2025-03 Β· [positive]
- B4
βCustomer service is difficult to get in contact with.β
freshlycharged.com β Bluetti EP500Pro Review: This Thing is Big and Smart! Β· unknown Β· [negative]
- B5
βThe display does not show the estimated run time, and it gets washed out in direct sunlight.β
freshlycharged.com β Bluetti EP500Pro Review: This Thing is Big and Smart! Β· unknown Β· [negative]
- B6
βThe fan on the EP500 Pro is very quiet.β
freshlycharged.com β Bluetti EP500Pro Review: This Thing is Big and Smart! Β· unknown Β· [positive]
- B7
βAt 83kg it's far too heavy for a single user to lift β even two fit people would struggle to move it upstairs.β
trustedreviews.com β Bluetti EP500Pro Review: A staggering amount of power Β· unknown Β· [negative]
- B8
βThe app doesn't do the sums to let you know when you can expect it to stop charging, and you can't schedule the AC or DC outputs.β
trustedreviews.com β Bluetti EP500Pro Review: A staggering amount of power Β· unknown Β· [negative]
- B9
βPower output is rock-solid and very stable, even at high load.β
trustedreviews.com β Bluetti EP500Pro Review: A staggering amount of power Β· unknown Β· [positive]
- B10
βA used EP500 Pro threw error code 006 (SPS voltage low) and wouldn't charge or power any ports; Bluetti refused support since the owner wasn't the original buyer.β
diysolarforum.com β "help with my bluetti ep500pro" thread Β· unknown Β· [negative]
- B11
βIt weighs 182 pounds, which makes it less portable than some other power stations on the market.β
technicaltrendy.com β BLUETTI EP500Pro Solar Power Station Review Β· unknown Β· [negative]
Research compiled November 1, 2026.
Who Should Buy Which
Buy the SOLIX S2000 if youβ¦
- βYou want one box that carries the fridge, the CPAP, the router and the laptops through a normal outage, and you would like to be able to put it in the car in October. 35.7 lbs and 2,010Wh is that box.
- βYour loads are electronics rather than appliances. Nothing you own pulls more than 1,500W at once, so the S2000's ceiling never comes up and the EP500Pro's inverter is a feature you would pay for and never use.
- βYou are buying for a decade. A minimum 10,000 cycles works out to 27.4 years of daily cycling or 96 years of weekend use, and at the end of the rating the pack settles to about 80% of what it started with rather than dying.
- βThere is a desktop with unsaved work on the circuit you are protecting. No worse than 10ms is the better rated class on this page, and it is the one where a simulated outage has actually been run with office gear attachedA9.
Buy the EP500Pro if youβ¦
- βYour outages run days rather than evenings. Ending an eight-hour night at 38% used with 2,707Wh still in the pack, then refilling 5,120Wh at up to 2,400W of solar, is a different order of preparation than the S2000 can offer at 400W.
- βSomething in your house needs more than 1,500W sustained. A well pump, a window AC running alongside the fridge, a microwave and a kettle together. 3,000W is the reason this unit exists and the S2000 has no answer to it.
- βIt is going into a utility room, a garage or a basement and staying there for good. If it never has to leave the floor you set it on, 187 lbs costs you precisely nothing. One catch: BLUETTI no longer sells the EP500Pro, so a new one means leftover stock or the second-hand market. If you want this shape of unit from BLUETTI's current range, the Apex 300 + B300K is the pairing it now sells for home backup.
If neither fits
If van life is the plan, close this tab. That day asks 4,685Wh and even the EP500Pro comes up 333Wh short of it once the flat 15% usable allowance is applied, while the S2000 covers about 36%. What you want is a house battery wired into the vehicle with alternator and roof-solar charging, not a plug-in box you refill every night. The same goes for a genuinely off-grid weekend: 2,100Wh beats the S2000 by 392Wh, and the unit that has the energy weighs 187 lbs and is not coming with you.
The Bottom Line
Take the S2000. It is the one still on sale, it is the one you can pick up, and it will move more energy across its rated life than the machine carrying two and a half times its battery: 20,096 kWh against 17,920, because cycles multiply and capacity does not. Three cents a lifetime kilowatt-hour is not a figure another feature argues with.
The exception is real and you will know if it is yours. If the grid goes down for days rather than hours, or something in the house pulls more than 1,500W, then 2,707Wh of overnight reserve and a 3,000W inverter stop being luxuries and the S2000 cannot substitute for either. Everyone else is considering 187 lbs of insurance against a night they have never had, from a maker that has stopped selling it. Get the S2000.
Frequently Asked Questions
Answers drawn from the spec record and cited owner research.
Is the BLUETTI EP500Pro worth choosing over the Anker SOLIX S2000?
Only for two things: sustained output above 1,500W, and outages that run past a single night. BLUETTI no longer sells it, so this page shows it no price, but the spec gap is what it always was: 5,120Wh against 2,010Wh, 3,000W sustained against 1,500W, and a 2,400W solar input against 400W. If none of those three describe your actual week, that is headroom you will not use, and the S2000 at three cents a lifetime kilowatt-hour is the easier sum.
Can the Anker SOLIX S2000 run a house during a blackout?
It runs one night's essentials, not a house. Our eight-hour blackout scenario asks 1,645Wh and the S2000 finishes it at 96% used with 63Wh left, so it works and it works with almost nothing spare. The 1,500W rated output is the real limit: fridge, router, CPAP, lights and laptops are comfortable, while a well pump, an electric range or a space heater are not.
Which one is better for a CPAP?
Both cover the night easily. A CPAP is roughly 40W for eight hours, which is 19% of the S2000 and 7% of the EP500Pro, so capacity decides nothing at all here. Decide on noise and weight instead: two independent hands-on tests found the S2000 silent at idle, while the EP500Pro publishes no noise figure and rests on a single reviewer calling its fan very quiet.
How long will each battery actually last?
The S2000 is rated for a minimum 10,000 cycles and the EP500Pro for a minimum 3,500. In years that is 27.4 against 9.6 at daily cycling, or 96 against 34 at weekend use. Hitting the cycle limit does not kill either pack, it drops to about 80% of original capacity and keeps going. Because a cycle is 2,010Wh on one and 5,120Wh on the other, the fairer comparison is lifetime energy: 20,096 kWh against 17,920.
Can you take the EP500Pro camping or to a tailgate?
Realistically, no. At 187 lbs it is a two-person job at best, and reviewers describe it as essentially immovable without its wheels with two fit people still struggling to get it upstairs. That is why our tailgate scenario goes to the S2000 by default, which then earns it on the numbers anyway, covering the 670Wh with 1,038Wh to spare.
Where to buy
Anker SOLIX S2000Pick
$699.99
$699.99 Β· direct from Anker
Last checked 28 days ago. Prices move β check before you buy.
BLUETTI EP500Pro
Sold out at BLUETTI
Prices may vary by retailer and are subject to change.