Head-to-head test
Anker SOLIX F3800 PLUS vs BLUETTI AC500 + 2×B300K
Real-world runtimes, scenario verdicts, and ownership costs compared — which wins for your use case.
Written by Gunner GustafsonUpdated
Whole-Home Backup Tester, Station Arena Test Desk
Anker
SOLIX F3800 PLUS
6,170Power Score · The AC & Fridge Zone
$2899.00 list · direct from Anker
BLUETTI
AC500 + 2×B300K
6,612Power Score · The AC & Fridge Zone
$3,299.00 list · direct from BLUETTI
Spec deltas
The Anker SOLIX F3800 PLUS and BLUETTI AC500 + 2×B300K compete for the same spot. Similar LiFePO4 capacity, similar price range, different brands behind them. In this matchup, ecosystem, app quality, and warranty reputation matter as much as raw specs. We'd buy the SOLIX F3800 PLUS.
What the spec gap means in practice: the AC500 + 2×B300K's 5,000W inverter can run a window AC unit, a full-size fridge, or power tools. The SOLIX F3800 PLUS's 6,000W inverter will flat-out refuse to start those appliances. On stamina, the AC500 + 2×B300K keeps a fridge alive for roughly 31 hours vs the SOLIX F3800 PLUS's 22 hours. The cost? Portability. At 196.1 lbs, the AC500 + 2×B300K is a two-person lift you set down once and leave. The SOLIX F3800 PLUS at 132.3 lbs is more manageable, though still not light.
Pick the SOLIX F3800 PLUS if you want maximum capability and room to grow. Go with the AC500 + 2×B300K if you primarily need it for weekend camping or 8-hour blackout. Most buyers overlook this: the AC500 + 2×B300K costs ~$0.17/kWh over its full lifespan, which adds up significantly over years of regular use. Keep scrolling for the full breakdown. The scenario verdicts below hold a few surprises.
Bench Notes
What each unit does well, where it falls short, and the trade-offs that matter.
Anker SOLIX F3800 PLUS
With a massive 6,000W output (and 9,000W surge), the SOLIX F3800 PLUS can run high-wattage appliances like space heaters, hair dryers, and electric grills without tripping. Weighing in at 132.3 lbs, this is not a unit you want to carry far. It's best suited as a stationary backup or RV companion.
Strengths
- +Costs $400 less
- +Lighter by 63.8 lb
- +Higher AC output
- +Longer warranty
- +Faster solar charging
Trade-offs
- –Very heavy unit that may be difficult for one person to lift.
BLUETTI AC500 + 2×B300K
With a massive 5,000W output (and 10,000W surge), the AC500 + 2×B300K can run high-wattage appliances like space heaters, hair dryers, and electric grills without tripping. Weighing in at 196.1 lbs, this is not a unit you want to carry far. It's best suited as a stationary backup or RV companion.
Strengths
- +Larger battery capacity
Trade-offs
- –Significantly heavier (+63.8 lbs), making it harder to move.
- –Weaker inverter (-1,000W) limits appliance compatibility.
- –Very heavy unit that may be difficult for one person to lift.
Will It Power Your Gear?
Scenario math and per-appliance runtimes, modeled from the spec record.
Scenario verdicts
We ran the math on six real-world scenarios. Here's which unit survives your actual life.
SCN-01 · 2 nights · needs 2,100Wh
Weekend Camping
Two nights off-grid with essential comfort
AC500 + 2×B300K
The SOLIX F3800 PLUS cuts it close at 64%. One cold night or an unexpected device and you're rationing power. The AC500 + 2×B300K finishes at 45%, leaving real headroom for spontaneous use. If you camp in variable weather, that buffer keeps you relaxed instead of checking your battery app every 20 minutes.
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
AC500 + 2×B300K
Both survive, but the AC500 + 2×B300K finishes at just 35% used. That's enough reserve for a second blackout night. The SOLIX F3800 PLUS at 50% leaves little margin if the outage runs longer than expected. In storm-prone areas, that remaining capacity is insurance.
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 are wildly overqualified for CPAP. You're using 10% or less. Save your money and buy whichever is cheaper; the extra capacity is completely wasted on a 40W overnight load. Put the savings toward a second battery for multi-night trips.
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 breaking a sweat. At these utilization levels, prioritize the unit with better USB-C output for direct laptop charging. It's more convenient than using the AC inverter and wastes less energy.
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
Either unit
Both handle game day easily. Since capacity isn't the deciding factor, consider weight: the lighter unit is easier to load into a truck bed. Also check if either has Bluetooth speaker-level noise. Fan sound matters in social settings.
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
AC500 + 2×B300K
The SOLIX F3800 PLUS runs out of juice. It only has 3,264Wh usable, but this scenario needs 4,685Wh. The AC500 + 2×B300K covers it and still has 1h of phone charging left over.
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 six 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: AC500 + 2×B300K runs 22.9h vs 15.9h.
$3,299 list · direct from BLUETTI
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 0–313.4hComfort & Convenience
Makes off-grid life actually enjoyablescale 0–62.7hHigh-Draw Appliances
These reveal the real limitsscale 0–4.7h¹ 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
July 10, 2026
Verdict: the SOLIX F3800 PLUS
The SOLIX F3800 PLUS outperforms the AC500 + 2×B300K in key areas. It offers higher output (+1,000W). Crucially, it costs $400 less, making it the smarter financial choice.
Overall score margin: 6,170 vs 6,612 (−7.2%)
List prices as of July 10, 2026. The links below open Anker's and BLUETTI's current prices.
$2899.00 list · direct from Anker
or check the AC500 + 2×B300K price$3,299.00 list
Written by Gunner Gustafson, Whole-Home Backup Tester · Station Arena Test Desk · Updated July 10, 2026
Measured Data
Benchmark scores and the full spec record, side by side.
Benchmark scores
Full specifications
| Specification | SOLIX F3800 PLUS★ Our pick | AC500 + 2×B300K |
|---|---|---|
| Price | $2899.00 Check latest price | $3,299.00 Check latest price |
| Capacity (Wh) | 3840 | 5530 |
| Output (W) | 6000 | 5000 |
| Surge Peak | 9000W | 10000W |
| AC Outlets | 9 | Not Specified |
| USB-C Charging Outputs | 100W | 100W |
| Solar Input (W) | 3200 | 3000 |
| Weight (lbs) | 132.3 | 196.1 |
| UPS | Yes (<20ms) | Yes (20ms) |
| Charging Cycles | 3000 | 3500 |
| Chemistry | LiFePO4 | LiFePO4 |
| Warranty (Years) | 5 | Not Specified |
| Battery Expansion Feasibility | Yes | Yes |
| App Control | Yes | Yes |
| $/Watt Hour | $.75 | $.60 |
| Noise Level (db) | N/A | Not Specified |
| Solar Input Type | Proprietary | MPPT |
| USB-A Ports | 2 | 2 |
| USB-C Ports | 3 | 2 |
| Cost per Whᵈ | $0.75/Wh | $0.60/Wh |
ᵈ Derived: price ÷ rated capacity.
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.
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.
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 F3800 PLUS (132.3 lbs) is a two-person lift. The AC500 + 2×B300K (196.1 lbs) is firmly a two-person lift. It goes where you put it and stays there. That's a 64 lb difference, which you'll feel every time you relocate.
Surge Power: Inverter Quality Indicator
The AC500 + 2×B300K has a 2× surge-to-continuous ratio vs the SOLIX F3800 PLUS's 1.5×. A higher ratio (≥2×) means the inverter handles motor startup surges better. That's critical for fridges, AC compressors, and power tools that briefly draw 2-3× their rated wattage. The SOLIX F3800 PLUS may trip when starting these appliances even though its continuous wattage looks sufficient.
Full record above — the Test Desk pick is the SOLIX F3800 PLUS.
Check SOLIX F3800 PLUS price →or check the AC500 + 2×B300K 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.
| Metric | SOLIX F3800 PLUS | AC500 + 2×B300K |
|---|---|---|
| Purchase price | $2899.00 | $3,299.00 |
| Lifetime energy delivery | 11,520 kWh | 19,355 kWh |
| Cost per lifetime kWh | $0.25 | $0.17 |
| Cost per warranty year | $580/yr | $∞/yr |
| Battery lifespan | 8.2yr daily · 28.8yr weekends · 57.7yr weekly | 9.6yr daily · 33.7yr weekends · 67.3yr weekly |
Analyst note
The SOLIX F3800 PLUS is cheaper to buy, but the AC500 + 2×B300K is cheaper to own. At $0.17/kWh over its lifetime vs $0.25/kWh, the AC500 + 2×B300K's higher cycle life and capacity make each dollar go further over the years.
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
Parent brand trust from Anker's consumer electronics dominance. InfiniPower technology for long cycle life. Gen 2 lineup offers exceptional $/Wh value — some of the best in the market.
Worth knowing
Support quality appears to be declining from its historically excellent level. Firmware updates have removed features without warning. Expansion ecosystem is smaller than EcoFlow's.
BLUETTI
Ecosystem
One of the broadest lineups — 15-20+ models from budget (AC2A) to flagship (Apex 300, 3072Wh). Includes specialized products: vehicle solar hubs, sodium-ion cold-weather units, and balcony storage systems.
Support
The most inconsistent support in the space. Heavily email-based with China timezone delays. Some users get smooth, efficient service; others report weeks of troubleshooting runarounds, being offered discounts on new units instead of repairs, and confusing third-party purchase claim processes. Buying direct from Bluetti's website tends to produce better support outcomes.
Community
Active and growing — Reddit r/bluetti has a dedicated community. Second-largest after EcoFlow in engagement.
App experience
Rated 4.5/5 iOS and Android — tied for best app experience in the category. V3.0 UI redesign was well-received.
Unique strength
Best capacity-to-price ratio in the market — strongest value proposition overall. Widest product diversity including industry-firsts like sodium-ion cold-weather units and dual solar+alternator vehicle hubs. Full LFP standardization across lineup (3,500-6,000+ cycles). Dual-voltage (120V/240V) in flagships.
Worth knowing
Customer support inconsistency is the #1 risk factor. Older/discontinued units may become unrepairable — no spare parts policy for some models. Some reports of erratic communication from support agents.
Analyst note
Anker and BLUETTI are close competitors. Both have established support channels and growing ecosystems. Compare their specific warranty terms and community size for your peace of mind.
Growth path
SOLIX F3800 PLUS
EXPANDABLESupports Anker expansion batteries, so you can add capacity later without replacing the base unit — useful if your needs may climb past 3,840Wh.
Accepts up to 3,200W of solar. Enough for a serious multi-panel array.
Generous port selection supports complex multi-device setups.
Expansion batteries are Anker-specific. You're investing in the Anker ecosystem.
AC500 + 2×B300K
EXPANDABLESupports BLUETTI expansion batteries, so you can add capacity later without replacing the base unit — useful if your needs may climb past 5,530Wh.
Accepts up to 3,000W of solar. Enough for a serious multi-panel array.
Limited ports. You'll likely need a power strip or splitter.
Expansion batteries are BLUETTI-specific. You're investing in the BLUETTI ecosystem.
Realistic full solar rechargeat 70% of rated panel output — see methodology
Analyst note
Both expand, so neither locks you out of growth — decide on capacity, price, and the rest, not the expansion checkbox.
The Bottom Line
The full picture comes down to this. The SOLIX F3800 PLUS edges ahead on our overall analysis, but the margin is narrow enough that your specific use case should drive the decision. Review the scenario verdicts above — if the AC500 + 2×B300K wins in the scenarios that match your life, it's the right choice regardless of aggregate scores.
If neither the SOLIX F3800 PLUS nor the AC500 + 2×B300K feels like the right fit, your power needs probably sit outside what these two target. For lighter use — weekend camping or phone/laptop charging — you'd be overpaying for capacity you'll rarely tap. Consider a unit in the 500–1,500Wh range instead. Prices on portable power stations fluctuate frequently. Both Anker and BLUETTI discount regularly, so check the current price before committing. Prime Day and Black Friday pricing typically drops 20-30%.
Frequently Asked Questions
Answers drawn from the spec record and cited owner research.
Is the AC500 + 2×B300K worth $400 more than the SOLIX F3800 PLUS?
The short answer: yes, if you'll actually use the extra capability. The AC500 + 2×B300K costs $400 more, but that premium buys you 1,690Wh more battery capacity (that's 10 extra hours of running a mini-fridge); a longer-lasting battery rated for 3,500 cycles — that's 10 years at daily use. On a cost-per-watt-hour basis, you're paying $0.60/Wh vs $0.75/Wh. Factor in cycle life and the math flips: the AC500 + 2×B300K costs $0.17/kWh over its lifetime vs $0.25/kWh. The "expensive" unit is actually cheaper to own. For regular use, we'd pay the premium.
How does the 1,690Wh capacity difference actually affect daily use?
The AC500 + 2×B300K's 5,530Wh battery keeps a mini-fridge running for roughly 31 hours vs the SOLIX F3800 PLUS's 22 hours. Both can handle a full 8-hour blackout setup (fridge + router + lights + phone charging ≈ 1,645Wh), but the AC500 + 2×B300K finishes with significantly more margin. That matters if conditions aren't ideal or the outage runs long. What specs don't mention: runtime drops 20-30% in cold weather (below 32°F/0°C) as battery chemistry slows down. The AC500 + 2×B300K's extra capacity provides a critical cold-weather buffer. For occasional phone and laptop charging, both are overkill. This gap only matters for sustained, multi-appliance use.
Can I actually carry the AC500 + 2×B300K, or is the SOLIX F3800 PLUS the only portable option?
Neither is "portable" in any hiking sense. The SOLIX F3800 PLUS (132.3 lbs) and the AC500 + 2×B300K (196.1 lbs) are both appliances you place and leave. The 63.8-lb difference matters when loading into a vehicle or moving between rooms, but that's about it. If true portability is your priority, look at units under 20 lbs in a different class entirely.
Is Anker or BLUETTI more reliable for long-term ownership?
Both brands have strengths and trade-offs. Anker: 5-year warranty standard on portable stations, 10-year on home energy systems. Historically very reliable, though some recent firmware updates have altered product functionality without notice or rollback option. BLUETTI: 2-6 years depending on model (up to 10 years on home backup systems). Response times vary significantly. Some reports of units being deemed unrepairable with no parts available for older models. One piece of advice from the power station community: regardless of brand, buy from Costco or Amazon. Their return policies provide a safety net that manufacturer warranties alone can't match, especially for a product you'll rely on in emergencies. Both brands use LFP (lithium iron phosphate) batteries in their current lineup, the most proven chemistry for longevity and safety.
Bottom line: should I buy the SOLIX F3800 PLUS or the AC500 + 2×B300K?
We'd buy the SOLIX F3800 PLUS. Strong value at a lower price, and for most real-world use cases the spec gaps don't translate to meaningful capability gaps. The AC500 + 2×B300K makes sense only if you specifically need its higher capacity for demanding sustained loads like full-home backup or commercial use.
Where to buy
Anker SOLIX F3800 PLUSPick
$2899.00
$2899.00 list · direct from Anker
BLUETTI AC500 + 2×B300K
$3,299.00
$3,299.00 list · direct from BLUETTI
Prices may vary by retailer and are subject to change.