Jackery Explorer 300 Plus
- AC delivered · measured
253 Wh. Show source
verified source253Wh discharged at 50W load (Trusted Reviews) vs 288Wh rated2026-07-04- output
300 W. Show source
claimed sourcejackery.com ↗- surge
600 W. Show source
claimed sourcejackery.com ↗- weight
3.75 kg. Show source
claimed sourcejackery.com ↗- recharge
120 min. Show source
claimed sourcejackery.com ↗
Balanced
#7 of 14
in the Ultraportable / carry class
Lifted by Trust & reliability and Durability & longevity; held back by charging & solar.
Check current availability and pricing at the retailer.
See alternatives to the Jackery Explorer 300 Plus →At a glance
Jackery Explorer 300 Plus is a ultraportable / carry model best suited to camper. It supplies 300 W of continuous AC output. BatteryRank scores it 54 out of 100 within its size class.
Our verdict on the Jackery Explorer 300 Plus
The specification that decides most purchases here is easy to miss: there is one AC outlet. Not two, one. Everything else follows from the same compact logic — 288 Wh, 300 W continuous, 3.75 kg — but the single socket is the constraint people discover after buying. It is also one of only three units in our whole catalogue where the tester published their load: 253 Wh delivered at 50 W, or about 88 percent.
- You want a delivered-capacity figure you can actually interpretThe 253 Wh result came with its 50 W test load stated, which almost no other measurement in our data does, so you know what conditions produced it.
- One device at a time is genuinely all you needA single AC outlet and 300 W continuous at 3.75 kg is a coherent package for a laptop or a camera charger, and the low mass is the whole point.
- Two things will ever need mains power at the same timeThere is exactly one AC socket, so a second mains device means unplugging the first no matter how much of the 300 W budget remains unused.
- You need more than a few hours from it253 Wh of measured delivery is a laptop for three or four hours, and the 120-minute recharge against a 100 W solar ceiling makes topping up off-grid slow. It holds 512 Wh and refills in 78 minutes.
The honest limit: Jackery markets the 288 Wh capacity, and the measured 253 Wh at a gentle 50 W draw is the realistic best case rather than a typical one. Delivery falls as draw rises, so a heavier load will return less than 88 percent — and since almost no other unit publishes its test load, this honest figure can look worse than rivals that simply never said.
What our data can’t tell you: A single 50 W measurement tells us about one point on a curve. We have no data on how this unit behaves near its 300 W rating, which is where conversion losses grow and where the practical answer matters most. Its 3,000-cycle rating is also unverified by any third party in our sources.
BatteryRank Engineering Team · Last reviewed · Method
Capacity truth
The watt-hour number on the box isn't what reaches your devices. Rated on the label vs what actually leaves an outlet.
288 Wh. Show source
claimed sourcejackery.com ↗2026-07-04The marketing number — total cell capacity.
253 Wh. Show source
verified source253Wh discharged at 50W load (Trusted Reviews) vs 288Wh rated2026-07-04253Wh discharged at 50W load (Trusted Reviews) vs 288Wh rated · 12% below the label
Also independently measured
- AC inverter efficiency
82 %. Show source
verified source~82% charge / ~87.8% discharge (Trusted Reviews)2026-07-04- Fan noise
25 dB. Show source
verified source25 dB (outputreport.com)2026-07-04- AC charge time
120 min. Show source
verified source~120 min AC (Macworld & Trusted Reviews both ~2 hr)2026-07-04- Solar performance
—. Show source
verified sourceSolarSaga 40W delivered only ~30W, +20% in ~3 hrs spring conditions (Macworld); bundled small panel weak for real solar charging2026-07-04
~82% charge / ~87.8% discharge (Trusted Reviews)
25 dB (outputreport.com)
~120 min AC (Macworld & Trusted Reviews both ~2 hr)
SolarSaga 40W delivered only ~30W, +20% in ~3 hrs spring conditions (Macworld); bundled small panel weak for real solar charging
What it can run
Same sourced device assumptions used by our calculators, applied to this model's usable AC energy. Actual runtime varies with load, temperature, and standby draw.
| Device | Estimated runtime | Sourced assumption |
|---|---|---|
| CPAP (humidifier off) | about 3.5 nights | 9 W · |
| CPAP (heated humidifier on) | about 0.6 nights | 56 W · |
| Refrigerator (full-size) | about 4.0 hours | 180 W × 35% duty cycle · |
| Wi-Fi router + modem | about 14 hours | 18 W · |
| Laptop (65W charger) | about 7.8 hours | 65 W × 50% duty cycle · |
| Phone (one full charge) | about 12 full charges | 20 W · |
Who it fits
Mechanical matches against this model's own sourced specs — never invented sentiment, never a guess on a spec we don't have.
3.75 kg with 100 W solar input → carry-in, solar-rechargeable
How it scores
Four buyer pillars over seven sub-scores — computed from sourced data with a published formula, price-independent by design.
Power
Battery-side usable capacity and how much you can run at once.
Usable watt-hours and how far you can grow it with add-on batteries, versus its size class.
Continuous and surge wattage, outlet count, and USB-C fast-charging.
Trust
Owner reputation, safety record, warranty, and build durability.
Owner ratings, brand reputation, recall record, and warranty backing.
Rated cycle life, warranty length, cell chemistry, and weather sealing.
Charging
est.Wall and solar recharge speed.
Wall recharge speed, solar input, and multi-source charging.
Livability
Lightweight, portable, and quiet enough to live with.
Weight, footprint, handle, and wheels, versus its size class.
Fan noise under load — quieter is better for bedrooms and CPAP use.
How this score is computed
The BatteryRank score is computed from sourced data with a published formula — ranked by data, not lab testing. Seven sub-scores blend into a 0–100 composite, grouped into four buyer pillars. Price is deliberately not a scoring input: prices move daily, so value intelligence lives in the price section above, judged against this model's own history.
| Pillar | Built from |
|---|---|
| Power | Capacity & expansion + Output & versatility |
| Trust | Trust & reliability + Durability & longevity |
| Charging | Charging & solar |
| Livability | Portability + Quiet / livability |
Scores are cohort-relative — each model is ranked against others in its size class. Missing inputs renormalize out rather than scoring zero (a model is never penalized for a spec nobody in its class publishes), and any figure resting on a documented estimate is tagged est. A full methodology page is coming.
Full specifications
Manufacturer-claimed unless marked verified (FCC/UL/DOE/lab). Tap or focus a figure to view its source.
Capacity & battery
- Battery-side usable capacity
288 Wh. Show source
claimed sourcejackery.com ↗- Rated cycle life
3,000 cycles. Show source
claimed sourcejackery.com ↗- Battery chemistry
LiFePO4. Show source
claimed sourcejackery.com ↗- Rated capacity
288 Wh. Show source
claimed sourcejackery.com ↗- Cycle-life threshold
80 %. Show source
claimed sourcejackery.com ↗
Energy available from the battery before output-conversion losses. AC-delivered capacity is shown separately in Capacity Truth.
How many full charge-and-drain cycles before the battery drops to its rated threshold (shown alongside — brands rate to different thresholds, so never compare bare cycle counts).
The type of battery cell. LiFePO4 (LFP) cells last far more cycles and are more thermally stable than older lithium-ion (NMC) cells.
The battery's nameplate energy capacity — the headline number on the box. Battery-side usable and AC-delivered capacity are shown separately.
The remaining-capacity level the cycle rating is measured to. 3,000 cycles to 80% is a stronger battery than 3,000 cycles to 70% — always read the two numbers together.
Power output
- Continuous power output
300 W. Show source
claimed sourcejackery.com ↗- Surge power output
600 W. Show source
claimed sourcejackery.com ↗- AC outlets
1 outlets. Show source
claimed sourcejackery.com ↗- USB-A ports
1 ports. Show source
claimed sourcejackery.com ↗- USB-C ports
2 ports. Show source
claimed sourcejackery.com ↗- USB-C max output
100 W. Show source
claimed sourcejackery.com ↗- 12V car ports
1 ports. Show source
claimed sourcejackery.com ↗- DC barrel ports
0 ports. Show source
claimed sourcejackery.com ↗- Max combined output
300 W. Show source
claimed sourcejackery.com ↗
The most power you can draw at once, sustained — this has to be higher than the running wattage of whatever you're plugging in.
A brief power spike the unit can absorb when a device first switches on — matters for things with motors or compressors, like fridges.
How many standard wall-style outlets are built in.
How many USB-A ports are built in, for charging older phones, lights, and accessories.
How many USB-C ports are built in — check the per-port wattage below if you need fast charging for a laptop.
The fastest a single USB-C port can charge a device — relevant for laptops and fast-charging phones.
How many car-socket (cigarette-lighter) style 12V outputs are built in — what CPAPs and car fridges plug into for the most efficient overnight running.
How many round barrel-style DC outputs are built in, used by routers, some lights, and older electronics.
The most power the unit can deliver across ALL ports at the same time — can be lower than the AC rating plus every USB port added up.
Charging & solar
- AC charge time (0–100%)
120 min. Show source
claimed sourcejackery.com ↗- Max solar input
100 W. Show source
claimed sourcejackery.com ↗
How long a full recharge takes from a wall outlet, start to finish.
The most solar panel wattage the unit can accept — undersized panels just mean slower charging, not damage, but oversizing this is wasted money.
Reliability & durability
- UPS switchover time
20 ms. Show source
claimed sourcejackery.com ↗
How fast the unit takes over when grid power cuts out. Under ~20ms is fast enough that most electronics — including many CPAP machines — won't even blip.
Size & portability
- Weight
3.75 kg. Show source
claimed sourcejackery.com ↗
How much the unit weighs on its own, without accessories — relevant for portability and carrying it up stairs during an outage.
What reviewers & owners report
Named outlets and marketplaces, each rating credited where it was published.
- compact/lightweight, well-built — Across reviewers ·
- informative LCD — Across reviewers ·
- pure sine AC — Across reviewers ·
- app control — Across reviewers ·
- safer LFP chemistry — Across reviewers ·
- strong AC efficiency — Across reviewers ·
- 5-yr warranty when registered — Across reviewers ·
- fewer charge cycles than rivals (e.g. EcoFlow River 2) — Across reviewers ·
- higher cost per kWh stored — Across reviewers ·
- slower charging than similar-capacity competitors — Across reviewers ·
- only 1 AC outlet — Across reviewers ·
- weak bundled solar panel — Across reviewers ·
- Popular Mechanics: none
- Wirecutter: none
Brand reputation: Generally positive; light-duty unit best for device charging not heavy loads; limited long-term failure data; Jackery brand support well-regarded
Sources: jackery.com product page & JE-300B user manual accessed 2026-07-04; amazon.com/dp/B0CFV93GZM accessed 2026-07-04; trustedreviews.com/reviews/jackery-explorer-300-plus; macworld.com Explorer 300 Plus review; saferproducts.gov checked 2026-07-04
What else to consider instead of the Jackery Explorer 300 Plus
Same or adjacent size class, ordered by the price-independent composite. Every alternative is better than the Jackery Explorer 300 Plus at something and worse at something else, so each row states both halves — each one arithmetic on two sourced readings, with a dimension skipped rather than guessed when either side is missing a figure.
- Goal Zero Yeti 300score 71 · same size class
- Why you would switch
- The Goal Zero Yeti 300 carries 17% more continuous output (350 W vs 300 W), which decides what it can run at all.
- What you give up
- The Jackery Explorer 300 Plus is 40% lighter (3.75 kg vs 6.2 kg).
- EcoFlow RIVER 3 Plusscore 65 · same size class
- Why you would switch
- The EcoFlow RIVER 3 Plus carries 100% more continuous output (600 W vs 300 W), which decides what it can run at all.
- What you give up
- The Jackery Explorer 300 Plus is 21% lighter (3.75 kg vs 4.72 kg).
- Bluetti Elite 30 V2score 63 · same size class
- Why you would switch
- The Bluetti Elite 30 V2 carries 100% more continuous output (600 W vs 300 W), which decides what it can run at all.
- What you give up
- The Jackery Explorer 300 Plus is 13% lighter (3.75 kg vs 4.3 kg).
- Anker SOLIX C300score 62 · same size class
- Why you would switch
- Nothing in the sourced data separates it from the Jackery Explorer 300 Plus by a margin worth acting on.
- What you give up
- Nothing the sourced data can show — the Jackery Explorer 300 Plus leads on no compared dimension by a margin worth acting on.
- EcoFlow RIVER 3score 55 · same size class
- Why you would switch
- The EcoFlow RIVER 3 reaches a full AC charge in 60 minutes against 120.
- What you give up
- The Jackery Explorer 300 Plus delivers 22% more usable AC energy (253 Wh vs 208 Wh).
Quick answers
Each answer restates a sourced figure from elsewhere on this page — nothing new, nothing guessed.
- How much does the Jackery Explorer 300 Plus weigh?
- 3.75 kg (8.3 lb), manufacturer-claimed, without accessories.
- What are the dimensions of the Jackery Explorer 300 Plus?
- 230 × 155 × 167 mm (9.1 × 6.1 × 6.6 in), length × width × height, manufacturer-claimed.
- How much capacity does the Jackery Explorer 300 Plus deliver through an AC outlet?
- About 253 Wh of the rated 288 Wh reaches an AC outlet from a full charge — measured in independent testing.
- How long does the Jackery Explorer 300 Plus take to charge?
- 2 h from a wall outlet, 0 to 100%, manufacturer-claimed. Fast-charge modes and solar input differ — see the charging specs on this page.
- How many watts can the Jackery Explorer 300 Plus output?
- 300 W continuous AC output and 600 W surge output, manufacturer-claimed. Appliance startup demand must stay within the relevant limit.
- How much solar input can the Jackery Explorer 300 Plus accept?
- 100 W maximum solar input, manufacturer-claimed. Actual harvest depends on panel compatibility, sun, orientation, temperature, and conversion losses.
- What is the cycle-life rating of the Jackery Explorer 300 Plus?
- 3,000 cycles to 80% remaining capacity, manufacturer-claimed. A cycle rating is not a calendar-life guarantee.
- Can the Jackery Explorer 300 Plus work as a UPS?
- Its manufacturer-claimed transfer time is 20 ms. Confirm that your connected equipment tolerates that transfer time; this is not the same as a zero-transfer online UPS.