Anker SOLIX C300 Review: Specs, Price, and Verdict
Updated August 2026
Quick answer: The Anker SOLIX C300 is a 288Wh LiFePO4 power station with 300W continuous AC output, a 140W USB-C PD port, and a 58-minute full AC recharge, making it our top pick for a compact backpack-sized backup unit at around $219. The Jackery Explorer 300 Plus is the closest runner-up, offering a slightly more refined build and marginally lower weight for about $30 more.
Anker SOLIX C300 Specifications
| Spec | Value |
|---|---|
| Battery capacity | 288Wh (LiFePO4) |
| AC output (continuous) | 300W, 600W surge |
| AC charging speed | 300W AC input, 0-100% in about 58 minutes |
| USB-C PD output | 140W (single port) |
| Solar input | Up to 100W, full recharge in 3-4 hours in good sun |
| Inverter type | Pure sine wave |
| Cycle life | 3,000+ cycles to 80% capacity |
| Weight | 8.2 lbs |
| Warranty | 5 years |
| Price | ~$219 |
At a glance
Anker SOLIX C300: Check Anker SOLIX C300 price on Amazon
Jackery Explorer 300 Plus: Check Jackery Explorer 300 Plus price on Amazon
Who the Anker SOLIX C300 Is For
The C300 is built for people who need power in a bag, not power for a house. At 288Wh it will not run a refrigerator or a space heater, but it comfortably covers a laptop, a phone, a small fan, a CPAP machine for a night, or a string of camp lights over a weekend trip. If your use case is a desk trip, a dorm room, a day of tailgating, or a backpacking base camp, this is the capacity class to shop in rather than a 1,000Wh-plus unit that adds 20+ pounds you will not use. For a walkthrough of how to size a unit to your actual loads, see our portable power station buying guide.
It also suits buyers who prioritize charging speed over raw capacity. Because the C300 recharges fully from a wall outlet in under an hour, it is realistic to top it off between uses rather than planning a multi-hour charge window — useful for anyone who forgets to charge gear until the last minute. If you are comparing charge times across the broader lineup, our fastest charging portable power stations roundup has the full rankings.
Students, remote workers who occasionally work from coffee shops or co-working spaces without reliable outlets, and parents who want a grab-and-go unit for stroller-mounted fans or tablet charging on long car rides are all squarely in this unit's target audience. The common thread is a need for reliable, quiet, pollutant-free power in situations where a gas generator would be impractical or against the rules — national parks, apartment balconies, and indoor venues all restrict or ban combustion generators, while a battery-based unit like the C300 works anywhere.
Where the C300 Fits in the Sub-300Wh Price Tier
The sub-300Wh category has become crowded, spanning roughly $150 budget units with generic lithium-ion cells up to $250-plus premium models with LiFePO4 chemistry and fast charging. The C300 sits near the top of that range in price but justifies it with the cycle life and charging speed advantages that budget lithium-ion units cannot match. Cheaper units in this bracket often use standard lithium-ion (NMC) cells rated for only 300-500 cycles, meaning they lose meaningful capacity within two to three years of regular use, versus the 3,000-plus cycles LiFePO4 units like the C300 are rated for. If price is the only factor, a budget NMC unit will look tempting on a spec sheet, but the total cost of ownership over five years usually favors paying more upfront for LiFePO4.
Real-World Runtime Examples
Specs on a box rarely translate directly into how long a device will actually run, so it helps to see the C300's 288Wh capacity against real loads. A 65W laptop charger will typically pull the C300 from full to empty in about 3.5-4 hours of continuous use, accounting for inverter losses of roughly 10-15%. A 10W LED camp lantern run continuously could last well over 20 hours. A CPAP machine drawing 30W without a heated humidifier should get 7-9 hours — close to a full night's sleep, though anyone relying on a CPAP nightly for medical reasons should treat that as a buffer rather than a guarantee and consider a larger-capacity unit as a backup. A portable mini-fridge or cooler drawing 45-60W continuously will drain the C300 in roughly 4-5 hours, which is fine for a day trip but not an overnight camping cooler solution.
These numbers assume the pure sine wave inverter is running near its rated efficiency and that ambient temperature is moderate; charging and discharging both slow down measurably in freezing conditions, which is true of virtually every LiFePO4 unit on the market, not just Anker's.
Standout Strengths
- 140W USB-C PD port. Most units in this size class top out at 60-100W USB-C. The C300's 140W port can fast-charge a 16-inch MacBook Pro at full speed, which matters if a laptop is your primary load rather than a phone or camera battery.
- Fast AC recharge. A 58-minute full recharge from a wall outlet is among the quickest in the sub-300Wh class, so the unit spends less time tethered to a plug between trips.
- Genuinely portable. At 8.2 lbs it is light enough to carry in a backpack or tote without a dedicated handle strategy, unlike the 20-30 lb units built for home backup. See our lightest portable power stations rankings for how it compares to other featherweight options.
- Pure sine wave output. Safe for CPAP machines, laptops, and other sensitive electronics that can be damaged by modified sine wave power.
- LiFePO4 chemistry. Rated for 3,000+ cycles to 80% capacity, which at a realistic pace of a few charges per month should outlast a decade of typical use — a meaningful upgrade over the 300-500 cycle lithium-ion cells used in older or budget power stations.
Honest Trade-Offs
- No display detail. The C300's screen shows battery percentage and input/output wattage but lacks the granular runtime estimates some competitors offer.
- Single AC outlet. Only one AC socket is onboard, so running more than one plugged-in device at a time means bringing a power strip.
- Basic solar charge controller. The 100W solar input uses a standard controller rather than full MPPT, so solar recharge efficiency is slightly behind larger SOLIX units.
- Not sized for appliances. 300W continuous output rules out microwaves, hair dryers, space heaters, and most kitchen appliances. If you need to run a refrigerator during an outage, look at a 1,000Wh-plus unit instead — see our best portable power stations for home backup guide.
- No expansion battery option. Unlike Anker's larger SOLIX C1000 and C2000 units, the C300 cannot be paired with an add-on battery pack to increase capacity, so you are locked into 288Wh for the life of the unit.
What to Avoid When Shopping This Category
A few red flags apply broadly to sub-300Wh power stations, not just the C300. First, watch for listings that advertise capacity in milliamp-hours (mAh) rather than watt-hours (Wh) without also stating the voltage — this is a common tactic to make a small battery sound larger than it is, since a headline mAh number means little without knowing the operating voltage used to convert it to Wh. Second, be skeptical of continuous wattage ratings that are not backed by a stated surge rating; if a listing only advertises peak wattage, assume the sustained output is meaningfully lower. Third, confirm the inverter is pure sine wave, not modified sine wave, if you plan to run a CPAP machine, laptop, or other electronics with sensitive power supplies — modified sine wave units are cheaper but can cause audible humming, reduced efficiency, or in rare cases damage to certain devices.
Anker SOLIX C300 vs. the Competition
The C300's closest rival is the Jackery Explorer 300 Plus, which we cover in detail in our Anker SOLIX C300 vs Jackery Explorer 300 Plus head-to-head. Both share the same 288Wh capacity, but the Anker charges faster (58 minutes vs about 90) and offers a higher-wattage USB-C port (140W vs 100W), while the Jackery has a marginally more refined build. At $219 versus $249, the Anker also wins on price per watt-hour, which we track across the full lineup in our best value portable power stations rankings.
Buyers who need CPAP-specific guidance, including realistic overnight runtime estimates, should also check our best portable power station for CPAP machines guide before deciding whether 288Wh is enough capacity for a full night.
Compared to gas-powered inverter generators in a similar power range, the C300 has no ongoing fuel cost, no exhaust fumes, no maintenance schedule, and near-silent operation — but it also cannot be refueled in the field the way a gas can be topped off, so total energy available on a trip is capped by however much you can recharge via solar or a wall outlet before you leave.
Setup and First Use
Out of the box, the C300 arrives partially charged (usually 50-80%), which is standard practice to protect the LiFePO4 cells during shipping and storage. Charge it fully before first use, then discharge and recharge it once more to let the battery management system calibrate its capacity readings accurately. After that, Anker recommends keeping the unit between 20% and 80% charge for long-term storage if it will sit unused for more than a month, rather than leaving it at 100%, which slightly accelerates long-term capacity fade in any lithium battery chemistry. If you plan to pair it with a portable solar panel for off-grid trips, our buyer's guide covers panel wattage matching so you avoid over- or under-sizing your solar setup relative to the C300's 100W input ceiling.
Should You Buy the Anker SOLIX C300?
Buy the Anker SOLIX C300 if you want the lightest, fastest-charging power station that can still handle a laptop, phone, and small electronics for a weekend away from outlets. Skip it if you need to run a refrigerator, want more than one AC outlet, or expect to power anything drawing more than 300W continuously — step up to a 1,000Wh-class unit like the Anker SOLIX C1000 Gen 2 instead. Check the current Anker SOLIX C300 price on Amazon to see if it fits your budget.
Frequently Asked Questions
Most CPAP machines without a humidifier draw 20-40W, so the C300's 288Wh battery can typically deliver 7-9 hours of runtime — enough for a full night in most cases, though heated humidifier settings will reduce that significantly.
Yes. The 140W USB-C PD port can power a laptop while the USB-A ports handle a phone or other small device simultaneously, all within the unit's 300W continuous output limit.
For anything beyond phone charging, yes. Generic power banks rarely exceed 100Wh or offer AC output, while the C300's pure sine wave AC outlet and 288Wh capacity can run laptops, small fans, and CPAP machines that power banks cannot handle.
At roughly $219 for 288Wh, the C300 costs about $0.76 per Wh, which is competitive within its size class and slightly better value than the Jackery Explorer 300 Plus at about $0.86 per Wh.
Yes, it accepts up to 100W of solar input through a basic (non-MPPT) charge controller, which can fully recharge the unit in roughly 3-4 hours of strong, direct sunlight with a compatible panel.
This is a gray area. Most airlines allow lithium batteries up to 100Wh without approval and 100-160Wh with airline approval, but generally prohibit batteries above 160Wh on passenger aircraft. Since the C300 is rated at 288Wh, it exceeds the typical limit, so travelers should contact their airline directly before attempting to fly with it rather than assuming it will be permitted.