Head-to-head test
Anker 535 PowerHouse vs Goal Zero Yeti 500
Capacity 13Wh apart, price $200 apart: the Yeti's entire case is that it hands over to battery in under 20ms, and the Anker doesn't hand over at all.
Full profiles: Anker 535 PowerHouse → · Goal Zero Yeti 500 →
Written by Wenny ZhengUpdated
Portable Power Tester, Station Arena Test Desk
$299.99 · direct from Anker
Last checked 1 day ago. Prices move — check before you buy.
$499.95 · direct from Goal Zero
Last checked 1 day ago. Prices move — check before you buy.
Spec deltas
Buy the Anker 535 PowerHouse at $300. The Goal Zero Yeti 500 is the better-equipped box, and it's still the wrong purchase for most people at $500, because nearly everything the extra money adds is headroom you won't reach.
These two are close enough to be genuinely confusing. 512Wh against 499Wh. 500W continuous on both. 16.7 lb against 16.1. Five-year warranties on both. The differences that read as real on the spec sheet are the Yeti's 200W solar ceiling against the Anker's 120W, its 100W USB-C against 60W, and 4,000 rated cycles against 3,000.
One more difference does actual work, and it's why this page isn't just a price comparison. The Yeti carries a published switchover spec. The Anker carries none. If the grid drops while something is running off the Yeti, that something keeps running. Whether that's worth the gap is the entire decision here, and for most buyers it isn't.
What the Numbers Reveal
Each conclusion stated first — the numbers behind it on one line, the full analysis below.
Typical price
So the gap between these two isn't buying capacity or cycles in any way a CPAP user would ever notice. It's buying the guarantee that the mask keeps blowing when the transformer down the street lets go. That's a narrow thing to pay two-thirds more money for. It's also, if it's your machine, the only thing on this page worth paying for.
CPAP Overnight is the only one of six scenarios either unit covers: 320Wh needed, 74% of the Anker's practical reserve and 75% of the Yeti's.The Yeti 500 transfers to battery in under 20ms; the Anker 535 publishes no switchover figure at all.The Yeti costs $500 against the Anker's $300.
Why it mattersIf a CPAP, an oxygen concentrator, or a home network you can't reset is going on this, buy the Yeti. If it's a cooler and phones, you're paying a premium for a feature that fires only during an outage.
rated cycles
And that's before you ask whether you can ever spend it. Weekend use puts the Anker's last cycle nearly three decades out and the Yeti's a decade past that, and nobody is on their first power station four decades from now. The extra cycle life is an asset with no exit. It converts to money in exactly one situation: daily cycling, where the gap shrinks to 8.2 years against 11 and finally starts to look like a purchase instead of a rounding error.
Anker: $300 buys 3,000 cycles across 512Wh, or 1,536 lifetime kWh at 20 cents each.Yeti: $500 buys 4,000 cycles across 499Wh, or 1,996 lifetime kWh at 25 cents each.At weekend duty the Anker's cells run 28.8 years and the Yeti's run 38.5; at daily duty it's 8.2 against 11.
Why it mattersPay for cycle life if this lives in a van and gets drained every night. If it lives in a garage between camping trips, you're buying years nobody reaches.
solar input
That's the one place the Yeti's premium buys something a camper feels in their hands. It swallows 200W of array; the Anker tops out at 120W on paper and lands lower than that in practiceA4, so a bright day becomes a partial refill instead of a full one. Flip the trip to car camping with an outlet at each end and the whole advantage evaporates, because the Anker is back to 80% from the wall in about the time it takes to shower and cook dinnerA4.
Weekend Camping needs 2,100Wh, which the table puts at 483% of the Anker's practical reserve and 495% of the Yeti's.The Anker's solar input caps at 120W and a full solar refill clocks in at 6.1 hours; the Yeti accepts 200W.Reviewers measured the Anker's real-world panel input at 60-75W against that 120W ceiling, and wall charging to 80% at about two and a half hoursA4.
Why it mattersMulti-day off-grid with panels is the second real case for the Yeti. Trips that begin and end at a wall outlet are the case for the Anker.
The specific dimensions that decide these two units — everything else is a tie.
What the Specs Don't Tell You
Selected because: The only card here that changes what a unit can do is UPS: one of these rides through a grid failure, and the 535 publishes no switchover spec at all.
rated cycles
Under 20 milliseconds is the entire premium. That's the Yeti's transfer from wall power to battery, fast enough that a modem doesn't drop its session, a CPAP doesn't stutter, and a clock doesn't blink. The Anker publishes no transfer time, which is the polite way of saying it isn't in that business.
The other two cards go against the Anker, and both are smaller than they look. A full refill through its 120W solar ceiling runs 6.1 hours, most of a usable solar day. And there's no app, so the front panel is your only readout of what's left. Neither is worth the premium. The app you'd stop opening after a month; the solar ceiling you work around by starting the trip full.
Lifetime Value
Selected because: $200 more buys 460 additional lifetime kilowatt-hours, which prices them at 43 cents each against the 535's blended 20 cents.
cost / lifetime kWh
Twenty cents a kilowatt-hour against twenty-five. That's the whole lifetime-cost story, and it's far closer than the sticker prices suggest, because the Yeti's extra 1,000 cycles genuinely do most of the work of justifying what it charges. Most. Not all.
What survives is the price of those cycles on their own: $200 for 460 additional lifetime kilowatt-hours, 43 cents apiece, more than double the Anker's rate for energy a weekend user doesn't reach until year 29. The warranties are identical at five years, which works out to $60 a covered year on the Anker and $100 on the Yeti. Same paper, different bill.
Your Life, Your Pick
Selected because: Five of the six profiles come back "neither," so the table's real job on this pair is telling you what these units are sized for.
Five of the six profiles come back the same way: neither. A weekend of camping wants 2,100Wh, which the table has at 483% of what the Anker can practically deliver. An eight-hour blackout wants 1,645Wh. Van life runs past 1,000% on both. If you came here to pick a blackout box, the useful finding is that you're shopping a size class too small.
The one profile both units clear is CPAP Overnight at 320Wh, about three-quarters of either one's practical reserve. That's the true shape of these machines: one meaningful load overnight, then a refill in the morning. Goal Zero's own literature puts a full-size fridge on the Yeti for up to six hoursB2, which is their figure rather than a measured one but the right order of magnitude for a 499Wh box. Which brings the handoff back around. The single load both of these are genuinely sized for is the one you'd least like to watch restart itself at 3 a.m.
Brand Trust
Selected because: Both warranties run five years, so coverage isn't the question; what separates the two companies is price position and a support record moving the wrong way at both.
Both companies once had support good enough to justify their prices, and neither is that company at the moment. Anker's SOLIX support has drifted toward AI-driven first responses and awkward hazmat return logistics on the heavier units. Goal Zero's 2025-2026 record runs to long waits, email that goes unanswered, tickets sitting for weeks, and official community forums that went dark and took the peer-support fallback with them. Five years of coverage on both sides means the paperwork is equal and the odds of a pleasant claim are equally uncertain.
What still separates them is what you're paying for the badge. Goal Zero is the pioneer of this category and its most expensive brand per watt-hour, and this pair proves it exactly: a dollar a watt-hour against fifty-nine cents. The heritage is real, the IPX4 ruggedization is real, the Yeti-Ready accessory line is real. None of it is worth the premium unless you're actually going to use it.
Strengths & trade-offs
Anker 535 PowerHouse
Strengths
- +Costs $200 less
- +Larger battery capacity
Trade-offs
- –Lacks smartphone app control for remote monitoring.
- –Shorter-lived battery — rated for 3,000 charge cycles vs the Yeti 500's 4,000, so it wears out sooner.
Goal Zero Yeti 500
Strengths
- +Lighter by 0.6 lb
- +Faster solar charging
- +Rated for 4,000 charge cycles — much longer battery lifespan
Trade-offs
- –Substantially more expensive (+$200) than the 535 PowerHouse.
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
Neither unit
Neither one carries the weekend. The profile wants 2,100Wh and the table has that at 483% of the Anker's practical reserve, 495% of the Yeti's, so you'd need about five of either. Both are perfectly good as the weekend's electronics box: phones, lights, a fan, a pump. Just don't plan the trip around the battery covering everything.
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
Neither unit
Neither covers eight hours of house load. The profile needs 1,645Wh, which lands at 378% of the Anker's practical reserve and 388% of the Yeti's, so call it a quarter of the job. What they do cover is the part that matters most, the fridge and the phones and one lamp and the router, for a stretch, and then you're recharging. If eight whole hours is the requirement, this size class isn't the answer.
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
Both clear it, and it's the only profile on this list either one does. A night is 320Wh, roughly three-quarters of what either can practically give, which is enough margin that a long night doesn't worry you and not enough to skip the morning recharge. The tiebreak is the uninterrupted handoff: if the grid drops at 3 a.m., the Yeti's owner sleeps through it and the Anker's might not.
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
Neither unit
Neither unit covers this scenario's 910Wh: the 535 PowerHouse comes up 475Wh short (about 48% covered), the Yeti 500 486Wh (47%). Treat this as partial cover — enough for the essentials in it, not the whole list.
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
Neither unit
Neither unit covers this scenario's 670Wh: the 535 PowerHouse comes up 235Wh short (about 65% covered), the Yeti 500 246Wh (63%). Either gets you most of the way, so this is a scenario you plan around rather than one you should rule them out for.
Battery budget usedlower = more headroom
LOAD Blender 400W×0.5h · LED TV (55") 80W×4h · Bluetooth Speaker 15W×4h · Phone Charger (×3) 45W×2h
SCN-06 · 24 hours · needs 4,685Wh
Van Life Daily
A full day of mobile living — the ultimate endurance test
Neither unit
Neither unit covers this scenario's 4,685Wh: the 535 PowerHouse comes up 4,250Wh short (about 9% covered), the Yeti 500 4,261Wh (9%). This is well outside what either unit is for; the right answer here is a larger station, not a choice between these two.
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
Dead heat — both run this 205W load for roughly 2.1h. Pick on price, weight, or ports.
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 0–29hComfort & Convenience
Makes off-grid life actually enjoyablescale 0–5.8hHigh-Draw Appliances
These reveal the real limits¹ 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
August 4, 2026
Verdict: the 535 PowerHouse
Buy the Anker 535 PowerHouse at $300 unless something you plug in can't survive a blink. The Yeti's premium buys 1,000 more charge cycles, 80W more solar input, 40W more USB-C, and a transfer to battery fast enough that a CPAP or a modem never registers the outage. Only the last of those changes what the unit can do, and it only fires when the grid fails. The extra 460 lifetime kilowatt-hours cost $200 on their own, which is 43 cents apiece against the Anker's blended 20, and a weekend user doesn't start drawing on them until year 29. If you're running medical gear or a home network you can't reboot in the dark, the Yeti is the honest answer and worth every dollar of it. Otherwise the $300 unit does the same job and leaves $200 for the panel that either one needs anyway.
Editor-assigned confidence, based on cited owner research and spec analysis.
List prices as of August 4, 2026. The links below open Anker's and Goal Zero's current prices.
$299.99 · direct from Anker
Last checked 1 day ago. Prices move — check before you buy.
or check the Yeti 500 price$499.95 list
Written by Wenny Zheng, Portable Power Tester · Station Arena Test Desk · Updated August 4, 2026
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.
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, 535 PowerHouse rates 3.7/5 (21st percentile of 20 Compact-class units), and Yeti 500 rates 4.5/5 (71st percentile of 22 Personal-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.
The 535's Solar Day Is the Whole Day
A full refill through the 535's 120W solar ceiling runs 6.1 hours, which is most of the usable light you get. That's fine if you arrive full and use panels to hold position. It's a problem if you plan to arrive empty and let the sun do the work. The Yeti accepts 200W, so it drinks faster from the same array.
535 PowerHouse: No App Control
Without app control, you have to physically walk to the 535 PowerHouse to check battery level, adjust settings, or monitor power draw. The Yeti 500 lets you do all that from your phone, including getting low-battery alerts.
One of These Rides Through the Outage
The Yeti 500 transfers from wall power to battery fast enough that a modem doesn't drop its session, a CPAP doesn't stutter, and a clock doesn't blink. The 535 publishes no transfer time at all, so anything running through it goes down when the grid does. This is the single difference between these two that changes what the unit can do rather than how much of it there is.
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 535 PowerHouse works out at 16.7 years of cover per $1,000 spent against the Yeti 500's 10, but that spread is the price gap, not the terms.
A Thousand Cycles You Probably Can't Spend
The Yeti is rated for 4,000 cycles against the 535's 3,000, and on daily duty that's a genuine difference: 11 years against 8.2. On weekend duty it stops being a difference at all. The 535's cells run 28.8 years at that rate and the Yeti's 38.5, and nobody is still on their first power station four decades from now. Pay for cycle life only if you're going to cycle it.
Full record above — the Test Desk pick is the 535 PowerHouse.
Check 535 PowerHouse price →or check the Yeti 500 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
Both units have similar long-term ownership costs ($0.2/kWh vs $0.25/kWh). The price difference is what you see on the sticker — neither is a hidden bargain or rip-off.
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, and for years the reason people bought Anker at all: replacements with no argument. SOLIX support has since drifted toward AI-driven first responses and awkward hazmat return logistics on the heavier units. The parent brand's equity is intact; the SOLIX trend line is pointing 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
Parent brand trust from Anker's consumer electronics dominance. InfiniPower technology for long cycle life. Strong $/Wh value in the mid-size and larger units — the S2000, F2600 and C1000 are among the better buys per watt-hour in the catalog.
Worth knowing
Anker firmware updates have removed features without warning before. The 535 has no app, which in this one narrow respect means there's nothing to push a change to.
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
A US company out of Salt Lake City, and for a long time the premium price came with premium service. The 2025-2026 picture is long waits, email that goes unanswered, and tickets sitting for weeks. The official community forums were shuttered, which removed the peer-support fallback at the same time.
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
Goal Zero is the most expensive brand per watt-hour in this category, and this pair illustrates it cleanly: a dollar a watt-hour against fifty-nine cents. What you're buying for that is heritage, IPX4 ruggedization, and the Yeti-Ready accessory ecosystem. Decide honestly whether you'll use them.
Analyst note
Two premium-support reputations, both fading, in opposite styles: Anker is automating its front line, Goal Zero is simply slowing down. Five-year warranties on both sides make the paperwork identical, so treat service quality as a coin flip and let price and features decide instead.
Growth path
535 PowerHouse
FIXED CAPACITYFixed at 512Wh, with no expansion — so size it for your needs up front rather than planning to add capacity later.
Accepts up to 120W of solar. Limited to a single portable panel.
Adequate ports for most setups, but heavy users may want a power strip.
Yeti 500
FIXED CAPACITYFixed at 499Wh, with no expansion — so size it for your needs up front rather than planning to add capacity later.
Accepts up to 200W of solar. Limited to a single portable panel.
Adequate ports for most setups, but heavy users may want a power strip.
Realistic full solar rechargeat 70% of rated panel output — see methodology
Analyst note
Neither expands, and that's no knock on either — each is a complete unit at a fixed size. Buy the capacity that covers your needs now (the 535 PowerHouse gives you the larger ceiling); you can't add to either later.
What Owners Report
Patterns from published owner reports and long-term reviews — every claim cited to its source below.
Anker 535 PowerHouse
Independent testing on the 535 is limited but consistent: measured round-trip efficiency of 89%, with the unit staying cool and stable while delivering its full 500WA3. The battery is LFP rated past 3,000 cycles with a claimed 10-year lifespan behind the 5-year warrantyA1, and the port layout runs four AC, three USB-A, a USB-C and a car socket in a package reviewers describe as compact for 512WhA2.
The one repeated caveat is solar. Real-world panel input lands at 60-75W against the 120W spec, while AC charging reaches 80% in about two and a half hoursA4. Read together, that's a unit you fill at the wall and top up in the sun, not the other way around.
“512Wh capacity with 500W output on LiFePO4 cells rated for 3,000+ cycles and a 10-year lifespan, backed by a 5-year warranty.”
Sources
ankersolix.com · trustedreviews.com · macrumors.com · batteryessence.com
Goal Zero Yeti 500
Independent field data on the LFP Yeti 500 is thin, because most of what's published traces back to Goal Zero itself: the 4,000-cycle rating with its decade-of-daily-use framingB1, and the claim that it'll carry a full-size fridge for hours during an outageB2. The substantive change worth knowing is the move from the older NMC-based 500X to LiFePO4 cellsB3.
The one genuinely long-term account comes from a 2026 reviewer who put 180+ charge/discharge cycles on it with minimal observed degradationB4. That's encouraging, and it's also under 5% of the rated 4,000. The cycle number you're paying extra for is still a spec sheet, not a track record.
“The Yeti 500's LiFePO4 battery is rated for 4,000+ cycles, meaning daily use for over 10 years (to 80% capacity at 75F).”
Sources
goalzero.com · rei.com · propaneva.com · portablepowernerd.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
- Durable LFP (3,000+ cycles, 5-yr warranty), efficient, and compact for weekend camping; slow solar input is the caveat. [535 PowerHouse · 2 entries]
- High 4,000+ cycle LFP rating and outage-backup capability (including running a fridge for hours) are the standout points. [Yeti 500 · 2 entries]
- A1
“512Wh capacity with 500W output on LiFePO4 cells rated for 3,000+ cycles and a 10-year lifespan, backed by a 5-year warranty.”
ankersolix.com / trustedreviews.com — 535 PowerHouse review · 2026 · [positive]
- A2
“Weighs 16.5 lbs and is compact for a 512Wh unit, with 4 AC ports, 3 USB-A, a USB-C, and a car outlet.”
macrumors.com / batteryessence.com — 535 PowerHouse review · 2026 · [positive]
- A3
“Demonstrated 89% round-trip efficiency and stayed stable and cool while delivering its full 500W AC output.”
batteryessence.com — 535 PowerHouse review · 2026 · [positive]
- A4
“AC charging to 80% takes about 2.5 hours; solar input caps at 120W (realistically 60-75W), so panel charging is slow.”
batteryessence.com — 535 PowerHouse review · 2026 · [mixed]
- B1
“The Yeti 500's LiFePO4 battery is rated for 4,000+ cycles, meaning daily use for over 10 years (to 80% capacity at 75F).”
goalzero.com / rei.com — Yeti 500 LFP · 2026 · [positive]
- B2
“Acts as a backup power supply when the grid drops — you can plug a full-size refrigerator directly in for up to six hours of runtime to prevent food waste.”
goalzero.com — Yeti 500 backup · 2026 · [positive]
- B3
“Weighs about 16 lbs, upgraded to LiFePO4 battery technology from the older NMC-based Yeti 500X.”
goalzero.com / propaneva.com — Yeti 500 review · 2026 · [mixed]
- B4
“One 2026 reviewer completed 180+ charge/discharge cycles with minimal observed degradation.”
portablepowernerd.com — Yeti 500 long-term review · 2026 · [positive]
Research compiled August 4, 2026.
Who Should Buy Which
Buy the 535 PowerHouse if you…
- →You're buying your first power station for weekends. Cooler pump, phones, lights, a fan. $300 covers all of it and leaves $200 for the panel you'll want more than the extra cycles.
- →Your trips start and end at a wall outlet. Two and a half hours puts you back at 80%A4, which is a shower and dinner, and then you never think about it again.
- →You want the most watt-hours per dollar in the sub-$500 class. Fifty-nine cents a watt-hour against a dollar isn't a close call.
- →Nothing you plug in cares about a blink. No medical gear, no network you'd have to go reset in the dark.
Buy the Yeti 500 if you…
- →A CPAP, an oxygen concentrator, or anything else where a dropout means waking up. The uninterrupted handoff is the only reason to spend the extra money, and for you it's a sufficient one.
- →Your home internet is on it. A modem and router that reboot every time the grid hiccups turn a two-second event into a fifteen-minute one, in the dark, at whatever hour it happens.
- →You're going multi-day off-grid with panels. 200W of accepted solar against 120W is the difference between a real refill and a top-up.
- →You'll cycle it daily. At that duty the Yeti's cells run 11 years to the Anker's 8.2, and the price difference finally has somewhere to go.
- →You want documented surge headroom. The Yeti publishes 1,000W against its 500W continuous; the Anker publishes no surge figure, so you're taking its 500W rating at face value.
If neither fits
If the scenario table is why you're here, close this tab. The eight-hour blackout, the van build, a weekend that doesn't end at an outlet: neither of these covers any of it, and it isn't close, because a camping weekend alone wants 2,100Wh against roughly 500Wh of battery. You want the 1,000-2,000Wh class, and you want it with an expansion port, because neither of these grows by a single watt-hour after you buy it.
The Bottom Line
Take the Anker 535 at $300. The Yeti 500 is the more capable box on paper, and its capability is stored almost entirely in places a 500Wh buyer never visits: 1,000 cycles past where the Anker quits, at 43 cents a kilowatt-hour for the privilege, arriving around year 29 of weekend use.
The exception is real and it's narrow. If something plugged into this can't take an interruption, a CPAP or a network you'd have to go reset in the dark, the Yeti's handoff is the one thing on this page the money genuinely buys, and it's worth it without argument. Everyone else: same weight, same output, thirteen watt-hours apart, two hundred dollars apart. Buy the cheap one and put the difference into a panel.
Frequently Asked Questions
Answers drawn from the spec record and cited owner research.
Is the Goal Zero Yeti 500 worth $200 more than the Anker 535 PowerHouse?
Only if you need power that doesn't interrupt. The Yeti transfers to battery in under 20ms; the Anker publishes no switchover spec at all, so it isn't a UPS. Everything else the extra money buys, meaning 1,000 more cycles, 80W more solar input and 40W more USB-C, is headroom, and most people buying a 500Wh box never reach it.
Is the Yeti 500 the same thing as the Yeti 500X?
No, and it's the single most confused thing about this unit. The 500X is the older NMC-cell model rated around 500 cycles; the Yeti 500 compared here uses LiFePO4 rated for 4,000+ cycles. Retail listings sometimes conflate the two, so check the chemistry before you pay. If the page says NMC, or quotes a cycle life in the hundreds, you're looking at the old one.
Can either of these run a refrigerator during a power outage?
For a few hours, yes. For a full eight, no. Goal Zero's own material puts a full-size fridge on the Yeti for up to six hours. The eight-hour blackout profile needs 1,645Wh, which the table puts at 378% of the Anker's practical reserve and 388% of the Yeti's. Treat both as a fridge-and-phones bridge, not a house backup.
Does the Anker 535 PowerHouse have a phone app or a UPS mode?
Neither. There's no app control, so the front panel is your only readout of state of charge, and there's no published switchover time, which means it can't be relied on to carry a load through a grid failure without interruption. If you want either of those, the Yeti is the unit that has them.
Can I add a second battery to either one later?
No. Both are sealed at the capacity you buy, 512Wh on the Anker and 499Wh on the Yeti. That's not a strike against either of them, because each is a complete unit at a fixed size rather than a modular system missing a piece. It does mean you size up front. If you suspect 500Wh is thin for what you're planning, buy bigger now instead of planning around an upgrade path that doesn't exist.
Where to buy
Anker 535 PowerHousePick
$299.99
$299.99 · direct from Anker
Last checked 1 day ago. Prices move — check before you buy.
Goal Zero Yeti 500
$499.95
$499.95 · direct from Goal Zero
Last checked 1 day ago. Prices move — check before you buy.
Prices may vary by retailer and are subject to change.