Head-to-head test
BLUETTI AC300 + 4×B300 vs BLUETTI EP800 + 2×B500
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
BLUETTI
AC300 + 4×B300
9,180Power Score · The AC & Fridge Zone
$5,596.00 list · direct from BLUETTI
BLUETTI
EP800 + 2×B500
10,261Power Score · Whole-Home Capable
$6,999.00 list · direct from BLUETTI
Spec deltas
Both carry the BLUETTI name, but they're built for different buyers. The AC300 + 4×B300 (12,288Wh, 3,000W) and the EP800 + 2×B500 (9,920Wh, 7,600W) come from different product lines with different engineering priorities and a $1,403 price gap. We'd buy the AC300 + 4×B300.
What the spec gap means in practice: the AC300 + 4×B300's 3,000W inverter can run a window AC unit, a full-size fridge, or power tools. The EP800 + 2×B500's 7,600W inverter will flat-out refuse to start those appliances. On stamina, the AC300 + 4×B300 keeps a fridge alive for roughly 70 hours vs the EP800 + 2×B500's 56 hours.
Pick the AC300 + 4×B300 if your primary use is van life daily. Go with the EP800 + 2×B500 if you need the heavier-duty specs for demanding loads. Most buyers overlook this: the AC300 + 4×B300 costs ~$0.13/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.
BLUETTI AC300 + 4×B300
With a massive 3,000W output (and 6,000W surge), the AC300 + 4×B300 can run high-wattage appliances like space heaters, hair dryers, and electric grills without tripping. Weighing in at 367.2 lbs, this is not a unit you want to carry far. It's best suited as a stationary backup or RV companion. A standout feature is the value proposition: at roughly $0.46 per watt-hour, it's one of the most cost-effective options on the market.
Strengths
- +Costs $1,403 less
- +Larger battery capacity
- +Longer warranty
Trade-offs
- –Weaker inverter (-4,600W) limits appliance compatibility.
- –Very heavy unit that may be difficult for one person to lift.
BLUETTI EP800 + 2×B500
With a massive 7,600W output (and 0W surge), the EP800 + 2×B500 can run high-wattage appliances like space heaters, hair dryers, and electric grills without tripping. Weighing in at 360.6 lbs, this is not a unit you want to carry far. It's best suited as a stationary backup or RV companion.
Strengths
- +Lighter by 6.6 lb
- +Higher AC output
- +Faster solar charging
Trade-offs
- –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
Either unit
Both handle two nights comfortably. The EP800 + 2×B500 uses 25% and the AC300 + 4×B300 uses 20%. With this little difference, pick based on weight and portability instead. The lighter unit wins for car camping.
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
Either unit
Both survive the blackout with similar margin. Since the capacity difference doesn't matter here, focus on which unit has UPS mode — seamless switchover protects your router and PC from the split-second power gap.
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 4% 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
AC300 + 4×B300
The EP800 + 2×B500 uses 56% of its battery. Doable but tight. Miss a day of solar recharge and you're in trouble. The AC300 + 4×B300 at 45% gives a much more sustainable daily rhythm. For full-time van life, miss a recharge day with the tighter unit and the next 24 hours get stressful fast.
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: AC300 + 4×B300 runs 51h vs 41.1h.
$5,596 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 0–696.3hComfort & Convenience
Makes off-grid life actually enjoyablescale 0–139.3hHigh-Draw Appliances
These reveal the real limitsscale 0–10.4h¹ 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 AC300 + 4×B300
The AC300 + 4×B300 outperforms the EP800 + 2×B500 in key areas. It offers more battery capacity (+2,368Wh) . Crucially, it costs $1,403 less, making it the smarter financial choice.
Overall score margin: 9,180 vs 10,261 (−11.8%)
List prices as of July 10, 2026. The links below open BLUETTI's current price.
$5,596.00 list · direct from BLUETTI
or check the EP800 + 2×B500 price$6,999.00 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 | AC300 + 4×B300★ Our pick | EP800 + 2×B500 |
|---|---|---|
| Price | $5,596.00 Check latest price | $6,999.00 Check latest price |
| Capacity (Wh) | 12288 | 9920 |
| Output (W) | 3000 | 7600 |
| Surge Peak | 6000W | Not Specified |
| AC Outlets | 7 | Hardwired (120/240V) |
| USB-C Charging Outputs | 100W | 0 |
| Solar Input (W) | 2400 | 9000 |
| Weight (lbs) | 367.2 | 360.6 |
| UPS | Yes (20ms) | Yes (20ms) |
| Charging Cycles | 3500 | 3500 |
| Chemistry | LiFePO4 | LiFePO4 |
| Warranty (Years) | 4 | Not Specified |
| Battery Expansion Feasibility | Yes | Yes |
| App Control | Yes | Yes |
| $/Watt Hour | $.46 | $.71 |
| Noise Level (db) | Not Specified | Not Specified |
| Solar Input Type | MPPT (12-150V, 2x1200W) | Dual PV (150-500V) |
| USB-A Ports | 2 | 0 |
| USB-C Ports | 2 | 0 |
| Cost per Whᵈ | $0.46/Wh | $0.71/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 EP800 + 2×B500 (360.6 lbs) is a two-person lift. The AC300 + 4×B300 (367.2 lbs) is firmly a two-person lift. It goes where you put it and stays there. That's a 7 lb difference.
Full record above — the Test Desk pick is the AC300 + 4×B300.
Check AC300 + 4×B300 price →or check the EP800 + 2×B500 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 | AC300 + 4×B300 | EP800 + 2×B500 |
|---|---|---|
| Purchase price | $5,596.00 | $6,999.00 |
| Lifetime energy delivery | 43,008 kWh | 34,720 kWh |
| Cost per lifetime kWh | $0.13 | $0.20 |
| Cost per warranty year | $1,399/yr | $∞/yr |
| Battery lifespan | 9.6yr daily · 33.7yr weekends · 67.3yr weekly | 9.6yr daily · 33.7yr weekends · 67.3yr weekly |
Analyst note
The AC300 + 4×B300 wins on both sticker price and long-term value. At $0.13/kWh over its lifetime, it's meaningfully cheaper to own. Clear value winner.
Growth path
AC300 + 4×B300
EXPANDABLESupports BLUETTI expansion batteries, so you can add capacity later without replacing the base unit — useful if your needs may climb past 12,288Wh.
Accepts up to 2,400W of solar. Enough for a serious multi-panel array.
Generous port selection supports complex multi-device setups.
Expansion batteries are BLUETTI-specific. You're investing in the BLUETTI ecosystem.
EP800 + 2×B500
EXPANDABLESupports BLUETTI expansion batteries, so you can add capacity later without replacing the base unit — useful if your needs may climb past 9,920Wh.
Accepts up to 9,000W 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, but the EP800 + 2×B500's higher solar ceiling (9,000W vs 2,400W) gives it the stronger off-grid growth path — more panels can feed a bigger bank as it grows.
The Bottom Line
The full picture comes down to this. The AC300 + 4×B300 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 EP800 + 2×B500 wins in the scenarios that match your life, it's the right choice regardless of aggregate scores.
If neither the AC300 + 4×B300 nor the EP800 + 2×B500 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 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 EP800 + 2×B500 worth $1,403 more than the AC300 + 4×B300?
The short answer: yes, if you'll actually use the extra capability. The EP800 + 2×B500 costs $1,403 more, but that premium buys you 4,600W higher AC output (opening the door to more demanding appliances); 6,600W faster solar charging for quicker off-grid recovery. On a cost-per-watt-hour basis, you're paying $0.71/Wh vs $0.46/Wh. For regular use, we'd pay the premium.
How does the 2,368Wh capacity difference actually affect daily use?
The AC300 + 4×B300's 12,288Wh battery keeps a mini-fridge running for roughly 70 hours vs the EP800 + 2×B500's 56 hours. Both can handle a full 8-hour blackout setup (fridge + router + lights + phone charging ≈ 1,645Wh), but the AC300 + 4×B300 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 AC300 + 4×B300'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.
How fast can each unit recharge from solar panels in real conditions?
On paper, the EP800 + 2×B500 accepts 9,000W vs the AC300 + 4×B300's 2,400W of solar input. What the spec sheet won't tell you: solar panels typically deliver only 60-80% of their rated output due to panel angle, cloud cover, and temperature. In realistic conditions, expect full recharge in about 1.6 hours for the EP800 + 2×B500 and 7.3 hours for the AC300 + 4×B300. That gap widens on cloudy days, when the EP800 + 2×B500's higher input ceiling captures more of whatever sunlight is available. One more thing: summer gives you ~7 productive solar hours per day. Winter drops to ~4. If solar is your primary recharge method, the EP800 + 2×B500's advantage is substantial.
Bottom line: should I buy the AC300 + 4×B300 or the EP800 + 2×B500?
We'd buy the AC300 + 4×B300. Cheaper and more capable. That combination is rare. The EP800 + 2×B500 doesn't offer a compelling reason to spend more unless you specifically need a feature unique to the BLUETTI ecosystem (expansion batteries, app integrations). Otherwise, clear call.
Where to buy
BLUETTI AC300 + 4×B300Pick
$5,596.00
$5,596.00 list · direct from BLUETTI
BLUETTI EP800 + 2×B500
$6,999.00
$6,999.00 list · direct from BLUETTI
Prices may vary by retailer and are subject to change.