Anker SOLIX C300 vs Powkey 99Wh: the portable power station verdict

Display

Neither product is a gaming monitor, so display quality here really means the quality of the built-in status readout and app monitoring rather than a visual screen experience. The Anker SOLIX C300 typically comes across as the more premium product in this respect, with a clearer, more informative interface and better ecosystem support through Anker’s app. The Powkey is simpler and more basic, which is fine for occasional use but less helpful when you want accurate visibility into remaining charge, input/output watts, and charging status. Winner: Anker SOLIX C300, because better monitoring matters on a power station.

Performance

This is the biggest gap in the comparison. The Anker SOLIX C300 offers 288Wh of LiFePO4 battery capacity, 300W continuous output, and 600W surge, which puts it in a completely different class from the Powkey’s 99Wh battery and 100W output. In practical terms, the Anker can run laptops, router setups, camera gear, lights, and many small appliances with far more headroom, while the Powkey is mainly for phones, tablets, small USB devices, and very low-power electronics. The Anker’s 140W two-way fast charging is also a major advantage: it can recharge quickly and is much more convenient for repeated use. Winner: Anker SOLIX C300 by a wide margin.

Build quality and design

Anker has the stronger reputation for engineering, and that shows in the SOLIX C300’s premium LiFePO4-based design. LiFePO4 chemistry is a big plus because it generally offers longer cycle life, better thermal stability, and more durable daily use than the lower-cost battery setups commonly found in budget units. The Powkey’s selling point is portability and simplicity, and at 99Wh it is easier to carry and more likely to fit airline carry-on rules, but it is clearly the less robust product overall. If you want something that feels like a serious piece of backup kit rather than a lightweight gadget, Anker wins. Winner: Anker SOLIX C300.

Battery life

Battery life is not just about the number on the box; it’s about how much real-world use you get before recharging. The Anker’s 288Wh capacity gives it nearly three times the stored energy of the Powkey’s 99Wh, which translates into much longer runtime for everything from phones to laptops and lights. The Powkey can be useful for a weekend emergency or topping up devices, but it is not built for extended off-grid use. If you need a power station that can meaningfully carry you through a camping trip or a longer outage, the Anker is the clear winner. Winner: Anker SOLIX C300.

Price and value for money

At £80.74, the Powkey is much cheaper than the Anker at £222.90, and the £142.16 price gap is significant. However, the value question depends on what you expect to power. The Powkey is good value only if your needs are modest and you specifically want a small, inexpensive backup for phones and USB charging. The Anker costs more, but you are paying for far greater capacity, higher output, better battery chemistry, and faster charging, which makes it better value for anyone who will actually use those capabilities. Winner: Anker SOLIX C300 for overall value; Powkey only wins on absolute lowest price.

Game library/features

If we translate this category into features and use-case flexibility, the Anker again comes out ahead. Its 300W output, 600W surge capability, 140W two-way fast charging, and LiFePO4 battery make it far more versatile for modern devices and more demanding scenarios. The Powkey does offer AC, DC, USB, and USB-C outlets, which is useful, but its 100W ceiling and 99Wh capacity limit what those ports can realistically do. In other words, it has the right labels, but the Anker has the usable power behind them. Winner: Anker SOLIX C300.

Overall user experience

The Anker SOLIX C300 is the more complete and confidence-inspiring product. It has a much stronger review score too, at 4.6/5 from 1,601 reviews, versus the Powkey’s 4.0/5 from 909 reviews, which supports the impression that Anker is the safer buy for most people. The experience of owning a power station is mostly about reliability, recharge speed, and whether it can actually handle the devices you own without tripping or running flat too quickly. The Powkey is easier to justify on price and portability alone, but it is best seen as a basic emergency charger rather than a true all-round portable power station. Winner: Anker SOLIX C300.

Overall summary: the Anker SOLIX C300 is the clear winner for almost everyone because it offers far more battery capacity, much higher output, faster charging, better build quality, and stronger long-term value. The Powkey is only the better buy if your budget is tight and you need the smallest, cheapest option for light-duty charging.