Head-to-head test
Anker SOLIX S5000 vs Goal Zero Yeti PRO 4000 + Tank PRO 4000 (Yeti PRO 8000)
Whether you need 7,988Wh in one stack on day one, because that extra 2,964Wh is the only thing the Goal Zero pair buys you for more than twice the money and twice the weight.
Full profiles: Anker SOLIX S5000 → · Goal Zero Yeti PRO 4000 + Tank PRO 4000 (Yeti PRO 8000) →
Written by Gunner GustafsonUpdated
Whole-Home Backup Tester, Station Arena Test Desk
Spec deltas
$3,499 separates these two, and nearly all of it buys capacity: the Goal Zero pair holds 7,988Wh to the Anker's 5,024Wh. Almost nothing else on the sheet goes Goal Zero's way. The S5000 puts out 4,500W continuous to the Yeti's 3,600W, peaks at 8,000W against 7,200W, and carries a 240V L14-30R outlet where the Yeti carries noneA3.
Then there's the lift. The Yeti PRO 8000 is a Yeti PRO 4000 stacked on a Tank PRO 4000, 196 lb between them. The S5000 is one 97 lb cabinet with wheels, a pull rod and a foot step for tipping it backA10A11. Neither goes camping on a whim, but only one of them gets wheeled across the garage by one person.
So the question is narrow. Is 2,964Wh of extra reserve on day one worth more than twice the price? For most homes it isn't, and if the house grows into it later, one BP5000 pack takes the S5000 to 10,048WhA6.
What the Numbers Reveal
Each conclusion stated first — the numbers behind it on one line, the full analysis below.
cost / lifetime kWh
Capacity per cycle and cycles per pack almost exactly cancel. The Yeti spends its bigger battery in fewer, larger gulps, rated to 4,000 cycles where Anker rates the S5000 to 6,000A12, so the extra money buys the same lifetime of electricity at more than twice the rate per kWh.
S5000: 6,000 cycles x 5,024Wh = 30,144 kWh over rated lifeYeti PRO 8000: 4,000 cycles x 7,988Wh = 31,952 kWh over rated lifeCost per lifetime kWh: $0.08 (S5000) vs $0.19 (Yeti PRO 8000)
Why it mattersAnyone cycling daily off solar should read the S5000 as the same lifetime of energy at well under half the cost per kWh.
continuous output
A 240V well pump, or a house panel fed through an L14-30 inlet, needs that split-phase leg, and the Yeti pair has nothing to offer it. On 120V the extra 900W is the margin that lets one more big appliance run beside the fridge instead of waiting its turn.
S5000: 4,500W continuous, 8,000W peakS5000: L14-30R outlet carrying 240V split-phase at 18.75AA2A3Yeti PRO 8000: 3,600W continuous, 7,200W surge, no 240V outlet on our record
Why it mattersIf a 240V circuit is on your backup list, the Yeti pair drops out before price even enters the conversation.
That lead only holds while nothing refills the Anker. Its solar ceiling matches the Yeti's 3,000W and doesn't ask for one maker's panels to reach it, and a 240V generator or dryer outlet feeds it at up to 4,500W. A clear day eats much of the 2,964Wh gap. A week of overcast with no generator doesn't.
8-Hour Blackout: S5000 finishes with 2,625Wh left, Yeti PRO 8000 with 5,145WhUsable after the flat 15% allowance: 4,270Wh vs 6,790WhS5000 accepts 3,000W of solar and up to 4,500W from 240V ACA4A5Yeti's full 3,000W solar rate needs Goal Zero's own panels and combinerB2
Why it mattersThe Yeti's extra stored energy really serves one buyer: someone whose outages outlast the weather and who has no other way to recharge.
The specific dimensions that decide these two units — everything else is a tie.
Lifetime Value
Selected because: Both are rated for about the same lifetime energy, so cost per lifetime kWh is where the price gap lands.
cost / lifetime kWh
Eight cents a lifetime kilowatt-hour against nineteen. The Goal Zero pair doesn't deliver more electricity over the years. It delivers about the same amount in bigger, fewer gulps, at $5,999 instead of $2,500.
Warranty doesn't rescue it: both carry 5 years. The honest caveat runs the other way. The S5000's 6,000-cycle figure is Anker's ratingA12, and nobody outside Anker has cycled one yetA0.
Portability & Form Factor
Selected because: One wheeled cabinet against a two-box stack decides who can move this alone.
weight
Ninety-seven pounds in one cabinet, tipped back on a foot step and rolled by a pull rodA10A11, is an awkward afternoon. The Goal Zero pair is that afternoon twice, plus reconnecting the stack at the other end.
Neither is portable in the camping sense. The difference shows up when the basement takes on water and one person has to get the battery up the ramp.
Growth Path
Selected because: Both expand, but the S5000 starts smaller and has the higher ceiling, so how much you'd add decides it.
The Yeti starts at 7,988Wh and reviewers put its ceiling at 20 kWh with four TanksB1. The S5000 starts at 5,024Wh and takes up to five BP5000 packs, to 30,144WhA6.
One pack already puts the Anker at 10,048Wh, past the Yeti pair as sold. The pack's price isn't on our record, so cost it before you count on it.
Your Life, Your Pick
Selected because: The Yeti's extra capacity wins the long unplugged runs; the Anker wins wherever the battery has to travel.
The engine splits this honestly. The Yeti pair wins the blackout on reserve and is the only one to finish the van-life day, where the S5000 comes up 415Wh short once the flat 15% allowance comes off its nameplate. The S5000 takes camping and the tailgate because the Yeti doesn't travel. CPAP and remote work are passes for both, and capacity decides neither.
Strengths & trade-offs
Anker SOLIX S5000
Strengths
- +Costs $3,499 less
- +Lighter by 98.9 lb
- +Higher AC output
- +Rated for 6,000 charge cycles — much longer battery lifespan
Trade-offs
- –Very heavy unit that may be difficult for one person to lift.
Goal Zero Yeti PRO 4000 + Tank PRO 4000 (Yeti PRO 8000)
Strengths
- +Larger battery capacity
Trade-offs
- –Substantially more expensive (+$3,499) than the SOLIX S5000.
- –Significantly heavier (+98.9 lbs), making it harder to move.
- –Weaker inverter (-900W) limits appliance compatibility.
- –Very heavy unit that may be difficult for one person to lift.
- –Shorter-lived battery — rated for 4,000 charge cycles vs the SOLIX S5000's 6,000, 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 · 2 nights · needs 2,100Wh
Weekend Camping
Two nights off-grid with essential comfort
SOLIX S5000
The Yeti PRO 4000 + Tank PRO 4000 (Yeti PRO 8000) at 196 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 Yeti PRO 4000 + Tank PRO 4000 (Yeti PRO 8000)'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
Yeti PRO 4000 + Tank PRO 4000 (Yeti PRO 8000)
Both survive the night. The Yeti PRO 4000 + Tank PRO 4000 (Yeti PRO 8000) finishes at 24% used with 5,145Wh left — 3.1 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
Either unit
A CPAP is about 40W for eight hours, so both cover the night with room to spare and capacity decides nothing. Fan noise would — but Yeti PRO 4000 + Tank PRO 4000 (Yeti PRO 8000) doesn't publish a figure, so there's nothing to hold it to. Buy on price, weight, and whether you can live with a fan you haven't heard.
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
Either unit
Both power your workstation all day without strain, and their USB-C output is a wash — pick on weight, ports, or price.
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 Yeti PRO 4000 + Tank PRO 4000 (Yeti PRO 8000) at 196 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 Yeti PRO 4000 + Tank PRO 4000 (Yeti PRO 8000)'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
Yeti PRO 4000 + Tank PRO 4000 (Yeti PRO 8000)
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 Yeti PRO 4000 + Tank PRO 4000 (Yeti PRO 8000) covers it with 2,105Wh 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: Yeti PRO 4000 + Tank PRO 4000 (Yeti PRO 8000) runs 33.1h vs 20.8h.
$5,998.95 list · direct from Goal Zero
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 0–452.7hComfort & Convenience
Makes off-grid life actually enjoyablescale 0–90.5hHigh-Draw Appliances
These reveal the real limitsscale 0–6.8h¹ 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
Take the S5000. It runs 4,500W continuous against 3,600W, adds a 240V split-phase outlet the Yeti pair doesn't have, weighs 97 lb against 196 lb split across two boxes, and costs $2,500 against $5,999. Over rated life it delivers 30,144 kWh to the Goal Zero pair's 31,952 kWh, which works out to $0.08 per lifetime kWh for the Anker and $0.19 for the Yeti. The Goal Zero's one real win is 2,964Wh more in the box today, and it shows up as 3.1 spare nights after an 8-hour blackout against 1.6. Confidence stops short of high because every S5000 figure is still Anker's own documentation, with no independent test behind itA0.
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 Goal Zero's current prices.
$2,499.99 · direct from Anker
or check the Yeti PRO 4000 + Tank PRO 4000 (Yeti PRO 8000) price$5,998.95 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:Yeti PRO 4000 + Tank PRO 4000 (Yeti PRO 8000) $5,999
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 Yeti PRO 4000 + Tank PRO 4000 (Yeti PRO 8000) rates 3.4/5 (4th 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 Yeti PRO 4000 + Tank PRO 4000 (Yeti PRO 8000) (196 lbs) is spread across its boxes — no single lift, but nothing you reposition on a whim. That's a 99 lb difference, and it is paid once — getting the heavier one into position, not every time you move it.
UPS Switchover: ≤10ms vs ≤15ms
Both list a UPS mode, at different rated speeds. The SOLIX S5000 is rated ≤10ms — quick enough on paper that desktop PCs and routers should ride through, treating that as the rating it is. The Yeti PRO 4000 + Tank PRO 4000 (Yeti PRO 8000) is rated ≤15ms — fine on paper for routers and most electronics; the fussiest PC power supplies sit right at this line. If a computer with unsaved work is the thing being protected, the stated class is worth the attention; nothing here is a lab result.
Warranty: No Difference
Both units carry the same 5-year warranty, so coverage isn't a tiebreaker here. 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 Yeti PRO 4000 + Tank PRO 4000 (Yeti PRO 8000)'s 0.8, but that spread is the price gap, not the terms.
Battery Lifespan in Real Years
The SOLIX S5000 is rated for 6,000 cycles vs 4,000. In real life: at daily use, that's 16.4 vs 11 years. At weekend use (twice a week), it's 58 vs 38 years. One caution reading years across different sizes: a cycle is 5,024Wh on the SOLIX S5000 and 7,988Wh on the Yeti PRO 4000 + Tank PRO 4000 (Yeti PRO 8000), so count lifetime energy — roughly 30,144 kWh against 31,952 kWh over the rated life. After hitting the cycle limit, the battery doesn't die — it drops to ~80% of original capacity, which is still very usable.
Yeti PRO 4000 + Tank PRO 4000 (Yeti PRO 8000): Noise Level Not Disclosed
The SOLIX S5000 publishes its noise level (30dB); the Yeti PRO 4000 + Tank PRO 4000 (Yeti PRO 8000) doesn't publish one. That isn't evidence the Yeti PRO 4000 + Tank PRO 4000 (Yeti PRO 8000) is louder — it means there's no figure to hold it to, and no way to compare the two on this without hearing them. If you're buying for a bedroom, a CPAP, or an apartment, treat the SOLIX S5000's 30dB as the only published number on the table — a spec-sheet figure, not a measurement — and look for hands-on reports of the Yeti PRO 4000 + Tank PRO 4000 (Yeti PRO 8000) before deciding.
Full record above — the Test Desk pick is the SOLIX S5000.
Check SOLIX S5000 price →or check the Yeti PRO 4000 + Tank PRO 4000 (Yeti PRO 8000) 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 caution on the lifespan row: the SOLIX S5000 takes longer to reach its cycle rating, but a cycle moves a different amount of energy on each unit — the Yeti PRO 4000 + Tank PRO 4000 (Yeti PRO 8000) still delivers more over its shorter horizon (31,952 vs 30,144 kWh). Years measure wear, not usefulness.
Delivers each lifetime kWh for $0.11 less — check the SOLIX S5000 price →
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's scale in consumer electronics behind the SOLIX line, and an app rated 4.5/5 on iOS. On this unit the hardware is aimed at a house circuit: split-phase 240V and room for five expansion packs.
Worth knowing
SOLIX support has drifted from Anker's old no-hassle reputation toward generic replies, and returning a heavy unit means hazmat shipping. Firmware updates have also removed features without warning.
Goal Zero
Ecosystem
Focused — a compact current line (6th-gen Yeti and Yeti Pro series), the previous-gen X series now out of stock across every model on Goal Zero's own store (checked 2026-09-13: 200X, 500X, 1000X, 1500X, 3000X, 6000X, some listed only as open-box), so buying one new means finding retailer stock, Sherpa power banks for the under-100Wh tier, plus Alta coolers, Nomad/Ranger solar panels, and vehicle integration kits
Support
US-based company (Salt Lake City, owned by NRG Energy). Historically considered premium support, but 2025-2026 reports describe long wait times, unresponsive email communication, and tickets going unaddressed for weeks. The "premium support justifies premium pricing" argument is weakening.
Community
Small but loyal — strong following in overlanding and preparedness communities. Official community forums were recently shuttered, frustrating long-time users.
App experience
Rated 4.4/5 iOS (~1,200 ratings) but recent reviews skew negative — recurring connectivity issues, crashes, and stability problems.
Unique strength
Pioneer of the portable power market — strongest brand heritage. US-based company with ruggedized, weather-resistant designs (IP ratings vary by model). Integrated "Yeti-Ready" ecosystem with coolers, lights, and vehicle kits.
Worth knowing
Typically the priciest brand per watt-hour — though individual pairings vary, and on some pages the Yeti is the cheaper energy. Support quality has declined from its "premium" standard. Perceived as competitively stagnant vs. faster-innovating Chinese competitors. Reliability reports on newer models are concerning.
Analyst note
Both brands' support has slipped from where it was. Goal Zero is US-based under NRG Energy but has shut its official forums and draws reports of slow tickets; Anker's SOLIX line draws reports of scripted replies. Neither is a reason to choose here. Buy on the hardware and register whichever you take.
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.
Yeti PRO 4000 + Tank PRO 4000 (Yeti PRO 8000)
EXPANDABLESupports Goal Zero expansion batteries, so you can add capacity later without replacing the base unit — useful if your needs may climb past 7,988Wh.
Accepts up to 3,000W of solar. Enough for a serious multi-panel array.
Generous port selection supports complex multi-device setups.
Expansion batteries are Goal Zero-specific. You're investing in the Goal Zero 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
No field record exists yet; what we hold is Anker's own documentationA0. The rating label establishes the 5,024Wh LiFePO4 pack and the 240V split-phase outputA1A2, and the product page supplies the 97 lb weight, the 6,000-cycle rating and the ≤10 ms switchoverA11A12A13. Read all of it as the maker's claim until someone else puts one on a bench.
“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
Goal Zero Yeti PRO 4000 + Tank PRO 4000 (Yeti PRO 8000)
Professional reviewers rate the Yeti PRO 4000 as highly reliable and built to lastB1. The owner record is less tidy: one owner's unit didn't work the first time the power went out, and the same retailer reviews call it buggyB3.
Reaching the full 3,000W solar rate takes Goal Zero's own panels and combiner boxB2, and the Tank's longer-life LiFePO4 cells are Goal Zero's claim rather than a field resultB4.
“A strong expandable system — you can add up to four Tank PRO 4000 batteries for up to 20 kWh; professional reviewers call it a high-powered, highly reliable power station built to last.”
Sources
batteryskills.com · techradar.com · goalzero.com · bestgeneratorsolar.com · business.walmart.co · thesolarlab.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]
- Praised for large expandability (to 20 kWh) and fast solar recharge; caveats are mixed owner reliability reports and a max solar rate locked behind proprietary Goal Zero hardware. [Yeti PRO 4000 + Tank PRO 4000 (Yeti PRO 8000) · 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]
- A4
“AC charging up to 1,800 W from a 120 V outlet (15 A for under three hours, 12 A continuous), or up to 4,500 W from 240 V. The same AC port runs bypass mode, passing wall power through to the outlets.”
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]
- A10
“An upright cabinet with a handle on top, a full-width front panel with a display, and wheels at the base; the label drawing of the back adds a foot step marked STEP ON for tipping it back onto its wheels.”
Power Station Arena, read from the S5000 card in the Anker app and the label drawing, 2026-09-20 · 2026-09-15 · [positive]
- 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 strong expandable system — you can add up to four Tank PRO 4000 batteries for up to 20 kWh; professional reviewers call it a high-powered, highly reliable power station built to last.”
batteryskills.com / techradar.com — Yeti PRO 4000 review · 2026 · [positive]
- B2
“Accepts up to 3,000W of solar input, but reaching that ceiling needs Goal Zero's own expensive proprietary panels and combiner box. Note the widely quoted "0% to 100% in under 2 hours" figure describes the standalone PRO 4000; with the Tank attached the system holds roughly twice the energy, so a full refill takes correspondingly longer.”
goalzero.com / bestgeneratorsolar.com — Yeti PRO 4000 review · 2026 · [mixed]
- B3
“Owner reviews are mixed on reliability — one owner's Yeti 4000 didn't work the first time they lost power and really needed it, and some report it's still riddled with bugs, though professional reviewers didn't experience those issues.”
business.walmart.com reviews / thesolarlab.com — Yeti PRO 4000 owner reviews · 2026 · [negative]
- B4
“The Tank PRO 4000 expansion batteries use improved LiFePO4 tech rated for a much longer lifespan than the previous generation of expansion batteries.”
goalzero.com — Tank PRO 4000 expansion battery · 2026 · [positive]
Research compiled October 9, 2026.
Who Should Buy Which
Buy the SOLIX S5000 if you…
- →The house with a 240V well pump or an L14-30 inlet that wants one box to feed it.
- →The person who will move the backup battery alone, across a garage or up a ramp, and would rather do it once with 97 lb.
- →Daily solar cyclers who want the cheaper lifetime kWh and can add a pack later if the house grows into it.
Buy the Yeti PRO 4000 + Tank PRO 4000 (Yeti PRO 8000) if you…
- →The cabin that sits through multi-day outages with no sun and no generator, where 2,964Wh of extra reserve on day one is the whole point.
- →Someone already invested in Goal Zero panels and a combiner, who gets the full 3,000W solar rate without buying anything elseB2.
- →Anyone who wants a 12V car socket or more than three USB ports on the battery itself; the S5000 has no 12V outletA15.
This is you — check the Yeti PRO 4000 + Tank PRO 4000 (Yeti PRO 8000) price
If neither fits
If it has to go to a campsite or a job site in a car, close this tab. These are house batteries on wheels; look in the class you can carry by the handle instead.
The Bottom Line
Same lifetime energy at less than half the cost per kWh, 900W more output, a 240V outlet, and half the weight. The Goal Zero pair's case rests on 2,964Wh of extra reserve, and that case is real only for long outages with no way to recharge. Everyone else should take the S5000, and add a pack the day the house asks for more.
Frequently Asked Questions
Answers drawn from the spec record and cited owner research.
Is the Goal Zero Yeti PRO 8000 worth more than twice the price of the Anker SOLIX S5000?
Only if you need 7,988Wh on day one. Over rated life the two deliver nearly the same energy, 31,952 kWh against 30,144 kWh, so the Goal Zero works out to $0.19 per lifetime kWh against the Anker's $0.08.
Can the Yeti PRO 8000 run 240V appliances?
Not on our record: it lists no 240V outlet. The S5000 has an L14-30R carrying 240V split-phase at up to 4,500W, which is what a 240V well pump or a generator inlet needs.
How heavy is the Yeti PRO 8000 compared with the S5000?
196 lb across the Yeti PRO 4000 and its Tank, against 97 lb for the S5000 in one wheeled cabinet. Neither is a carry. The Anker is the one a single person can tip onto its wheels and roll.
Which lasts longer in a power outage, the S5000 or the Yeti PRO 8000?
Unrecharged, the Yeti pair. After an 8-hour blackout it still holds 5,145Wh, about 3.1 more nights like it, against the S5000's 2,625Wh and 1.6 nights. With sun or a 240V charger the gap narrows, since the S5000 takes 3,000W of solar and up to 4,500W from 240V AC.
Related comparisons
Where to buy
Anker SOLIX S5000Pick
$2,499.99
$2,499.99 · direct from Anker
Goal Zero Yeti PRO 4000 + Tank PRO 4000 (Yeti PRO 8000)
$5,998.95
$5,998.95 · direct from Goal Zero
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