Our Verdict
Anker 521 Wins
Its LiFePO4 chemistry offers a 10-year lifespan and 600W peak output. Choose EnginStar for its slightly higher 296Wh capacity and three DC ports if battery longevity is less critical.
Bottom Line: Anker 521 is the better choice. Its LiFePO4 chemistry offers a 10-year lifespan and 600W peak output.
Key Differences
The most significant spec differences at a glance
Battery Capacity
14% lessDc Ports
67% lessAdvantages
Where each product wins
EnginStar
- Battery Capacity: 14% higher (256.0 vs 296)
- Dc 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 Anker 521 is perfect for the savvy buyer prioritizing long-term value and robust performance on a budget of $149.99. If you need a durable power station for occasional higher-draw appliances, its LiFePO4 battery offers a 10-year lifespan, and the 600W peak output can handle surge requirements. Campers, remote workers needing to charge laptops via the 60W USB-C PD, or anyone seeking a reliable, long-lasting backup power source for essential devices will find it ideal. Its 256Wh capacity is sufficient for daily use.
Buy EnginStar if...
EnginStar Solar Generator, 300W
The EnginStar R300 is suited for users who need a bit more raw capacity and port versatility, even at a slightly higher $199.99 price point. If your primary concern is powering multiple small DC devices simultaneously and getting a slightly larger 296Wh capacity for extended use, the EnginStar's three DC ports and eight total outputs are beneficial. It's a solid choice for campers, RV users, or those needing a backup for basic household electronics, provided the 300W continuous output meets their needs and they don't require high-wattage surge capabilities.
Spec Comparison
12 specs compared
| Specification |  |  |
|---|---|---|
| Price | $150 | $200 |
| Rating | 4.4(3.0k) | 4.3(1.4k) |
| Capacity Wh | 256W | 296W |
| Chemistry | LiFePO4 | Lithium |
| AC Output Watts | 300W | 300W |
| Dc Ports | 1 | 3 |
| AC Outlets | 2 | 2 |
| Weight | 8.16 lbs | — |
| USB A Ports | 2 | 2 |
| USB C Ports | 1 | 1 |
| Peak Output Watts | 600W | — |
| Cycle Life | — | 1000 |
| Model Number | — | R300 |
| Charge Time Hours | — | 7 hrs |
Swipe horizontally to see all columns
Pros & Cons
Quick overview of strengths and weaknesses
Anker Anker 521
- 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
- 8.16 lbs unit weight impacts portability
- 256Wh capacity limits high-draw use cases
- Solar charging requires separate panel purchase
EnginStar Solar Generator,
- Delivers 300W AC power with 296Wh battery capacity.
- Two 110V pure sine wave AC outlets.
- Recharges via AC, car, or 12-25V solar input.
- Rated for 1000 charge cycles.
- Limited to devices under 300W total output.
- 7-hour recharge time using AC wall adapter.
- Solar panel requires separate purchase.
Frequently Asked Questions
Common questions about this comparison
Which power station offers better long-term durability?
The Anker 521 is superior for longevity, utilizing a LiFePO4 battery that ensures a 10-year lifespan. The EnginStar uses a standard Lithium battery with a rated cycle life of 1000, which is good but typically less than LiFePO4's potential.
What's the main difference in AC output power?
Both provide 300W continuous AC power. However, the Anker 521 can handle peak loads up to 600W, offering more versatility for devices with high surge requirements. The EnginStar is limited to 300W peak.
Which product has a higher energy capacity?
The EnginStar has a slightly higher energy capacity at 296Wh. The Anker 521 offers 256Wh. This means the EnginStar provides a bit more runtime for your devices before needing a recharge.
Which is better for connecting multiple DC devices?
The EnginStar R300 is better for multiple DC devices, featuring three DC ports. The Anker 521 has only one DC port, limiting simultaneous DC connections.
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