Name: Anker 521 Portable Power Station Upgraded with LiFePO4 Battery, 256Wh 6-Port PowerHouse, 300W (Peak 600W) Solar Generator (Solar Panel Optional), 2...
Brand: ‎Anker
SKU: B09FF46FQ9
Price: 149.99 USD
Availability: InStock
Rating: 4.4 (2971 reviews)

Our Verdict

Anker SOLIX C300 Wins

Anker Portable Power Station SOLIX C300, 288Wh LiFePO4 Battery, 300W (600W Surge) Solar Generator, 140W Two-Way Fast Charging, for Outdoor Camping, Traveling, and Emergencies (Solar Panel Optional) Anker SOLIX C300 - Portable Power Stations

It offers 288Wh capacity vs 256Wh, 3 AC outlets vs 2, and 140W two-way fast charging. Choose Anker 521 for slightly less weight at 8.16 lbs for comparable AC output.

$250Buy on Amazon

Bottom Line: Anker SOLIX C300 is the better choice. It offers 288Wh capacity vs 256Wh, 3 AC outlets vs 2, and 140W two-way fast charging.

Key Differences

The most significant spec differences at a glance

256

Battery Capacity

11% less

288

AC Outlets

33% less

USB-A Ports

100% more

USB-C Ports

67% less

8.16

Weight

10% less

9.02

Advantages

Where each product wins

‎Anker

USB-A Ports: 100% higher (2 vs 1)
Weight: 10% lower (8.16 vs 9.02)

Anker

Battery Capacity: 11% higher (256.0 vs 288)
AC Outlets: 33% higher (2 vs 3)
USB-C Ports: 67% higher (1 vs 3)

Who Should Buy Which?

Find the right product for your needs

Buy ‎Anker if...

Anker 521 Portable Power

The ideal buyer for the Anker 521 is someone budget-conscious who needs reliable portable power for basic needs. If you prioritize a long-lasting LiFePO4 battery and sufficient 256Wh capacity for camping lights, charging phones, or running small appliances like a fan, this $149.99 unit is excellent. It's perfect for occasional outdoor trips, tailgating, or as an emergency backup for essential electronics without breaking the bank, offering 6 diverse output ports.

Buy Anker if...

Anker Portable Power Station

The Anker SOLIX C300 is perfect for tech-savvy users or frequent travelers who demand speed and versatility. If you regularly charge multiple devices simultaneously, including laptops via its 140W two-way USB-C, and need the unit itself to recharge rapidly (80% in 50 minutes), the $249.99 price is a worthwhile investment. Its 288Wh capacity and 8 output ports provide superior connectivity and sustained power for more demanding outdoor adventures or as a robust home emergency solution.

Spec Comparison

12 specs compared

Specification	Anker 521 Portable Power	Anker Portable Power Station
Price	$150	$250
Rating	4.4(3.0k)	4.6(1.7k)
Capacity Wh	256W	288W
Chemistry	LiFePO4	LiFePO4
AC Output Watts	300W	300W
Dc Ports	1	1
AC Outlets	2	3
Weight	8.16 lbs	9.02 lbs
USB A Ports	2	1
USB C Ports	1	3
Peak Output Watts	600W	600W
Cycle Life	—	3000
Charge Time Hours	—	0.83 hrs
Solar Input Watts	—	100W

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Pros & Cons

Quick overview of strengths and weaknesses

‎Anker Anker 521

Pros

LiFePO4 battery provides 10-year lifespan
Peak 600W output handles high-draw appliances
60W USB-C PD port recharges laptops quickly
Six outputs: 2 AC, 1 USB-C PD, 2 USB-A, 1 DC

Cons

8.16 lbs unit weight impacts portability
256Wh capacity limits high-draw use cases
Solar charging requires separate panel purchase

Anker Portable Power

Pros

288Wh capacity, 300W AC output (600W surge).
140W two-way USB-C port enables rapid charging.
8 output ports: 3 AC, 3 USB-C, 1 USB-A, 1 car.
LiFePO4 battery rated for 3,000 charge cycles.

Cons

Solar panel for recharging is not included.
Not compatible with all Anker solar panel models.
Only one of three USB-C ports offers 140W output.

Frequently Asked Questions

Common questions about this comparison

Which is better for outdoor camping?

The Anker SOLIX C300 is generally better for camping due to its higher 288Wh capacity, three AC outlets, and 140W two-way fast charging, allowing more devices to be powered and quicker recharges.

What's the main difference in capacity?

The Anker SOLIX C300 has a slightly higher capacity at 288Wh compared to the Anker 521's 256Wh. Both use a durable LiFePO4 battery chemistry, providing excellent longevity for repeated use.

Which power station charges faster?

The Anker SOLIX C300 charges significantly faster, reaching 80% capacity in 50 minutes via AC. It also features a powerful 140W two-way USB-C port, whereas the Anker 521's USB-C PD output is 60W.

How do the output ports compare?

The Anker SOLIX C300 offers more versatility with 8 output ports, including 3 AC outlets and 3 USB-C ports (one 140W). The Anker 521 has 6 outputs: 2 AC, 1 USB-C (60W), 2 USB-A, and 1 DC port.