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EF ECOFLOW Portable Power Station RIVER 3, vs EnginStar Portable Power Station 300W

Updated July 2026 — EF ECOFLOW Portable Power Station RIVER 3, wins on safety and weight, EnginStar Portable Power Station 300W wins on charging time and capacity.

The EF ECOFLOW RIVER 3 excels in charging speed and safety features, while the EnginStar offers higher battery capacity and multiple output ports. Choose based on your specific needs.

Why EF ECOFLOW Portable Power Station RIVER 3, is better

Charging Speed

RIVER 3 charges from 0-100% in 1 hour.

Safety Features

RIVER 3 has 40+ safety protocols.

Portability

RIVER 3 is 30% smaller than average.

Why EnginStar Portable Power Station 300W is better

Battery Capacity

EnginStar has 296Wh compared to RIVER 3's 245Wh.

Output Ports

EnginStar has 8 output ports for simultaneous charging.

Weight

EnginStar is lighter at 6.5 lbs.

Overall score

EF ECOFLOW Portable Power Station RIVER 3,
85
EnginStar Portable Power Station 300W
78

Specifications

SpecEF ECOFLOW Portable Power Station RIVER 3,EnginStar Portable Power Station 300W
Power Output300W (600W X-Boost)300W
Battery TypeLiFePO4Lithium Ion
Charging OptionsAC, SolarAC, Solar, Car
UPS FeatureYesNo
Warranty2 years1 year

Dimension comparison

EF ECOFLOW Portable Power Station RIVER 3,EnginStar Portable Power Station 300W

Price Comparison

The EF ECOFLOW Portable Power Station RIVER 3 is priced at $196.00, making it about 0.5% cheaper than the EnginStar Portable Power Station, which costs $199.99. This slight difference in price might not be a significant factor for many buyers, but it does position the RIVER 3 as a budget-friendly option among portable power stations. When considering which product to choose, the price could be a decisive element, especially for those looking for a good deal in the portable generator market.

Power Output

In terms of power output, both the EF ECOFLOW RIVER 3 and the EnginStar Portable Power Station provide up to 300W of AC power. However, the EF ECOFLOW offers an additional feature known as X-Boost, allowing it to handle up to 600W for short periods. This capability makes the RIVER 3 more versatile for running larger devices or those with high startup power demands. Therefore, if you require a power station that can adapt to a variety of appliances, the RIVER 3 could be the better choice.

Battery Capacity

The RIVER 3 has a battery capacity of 245Wh, while the EnginStar offers a slightly higher capacity of 296Wh. This translates to a difference of about 20.8%, giving the EnginStar an advantage when it comes to longevity and the ability to power devices for extended periods. If you plan to use your power station for longer trips or in emergency situations, the additional capacity of the EnginStar may be a compelling reason to choose it over the RIVER 3.

Charging Speed

Charging speed is crucial for any portable power station, and here the EF ECOFLOW RIVER 3 shines with its 1-hour fast charging capability. Utilizing X-Stream technology, it can go from 0% to 100% in just one hour, which is exceptional in this segment. In contrast, the EnginStar requires 2 hours to reach 80% charge when using a 65W charger. The significant difference in charging times makes the RIVER 3 a more attractive option for those who need quick power restoration during their outdoor adventures.

Portability

Portability is another essential factor for users looking to take their power stations on the go. The RIVER 3 weighs only 7.8 lbs and is designed to be 30% smaller than the industry average, making it easier to transport. The EnginStar, while lightweight at 6.5 lbs, is slightly larger in dimensions. The built-in handle of the RIVER 3 further enhances its portability, making it ideal for outdoor activities like camping or RV trips. Therefore, if compact and lightweight is a priority, the RIVER 3 has the edge.

Safety Features

Both power stations offer safety features, but the EF ECOFLOW RIVER 3 incorporates advanced safety measures with its X-Guard technology, which includes 40+ safety protocols. This system provides extensive protection against risks like current fluctuations, voltage spikes, and overheating. On the other hand, the EnginStar employs a battery management system that safeguards against short circuits, overcharging, and overloads. While both devices prioritize safety, the RIVER 3’s more comprehensive safety system may give users added peace of mind.

User Experience

When it comes to user experience, the EnginStar Portable Power Station boasts eight output ports, allowing it to charge multiple devices simultaneously, which is advantageous for users with various gadgets. In contrast, the RIVER 3 focuses on efficient operation with its auto-switching UPS feature, which activates in under 20 ms during a power outage. This ensures that essential appliances continue to function seamlessly. Depending on your needs—whether it's charging multiple devices at once or ensuring uninterrupted power—the choice between these two products will vary.

Which should you buy?

Ultimately, the decision between the EF ECOFLOW Portable Power Station RIVER 3 and the EnginStar Portable Power Station comes down to your specific needs. If you prioritize quick charging and advanced safety features, the RIVER 3 is the better option. However, if you require higher battery capacity and multiple output ports for simultaneous device charging, the EnginStar may serve you better. Both products have their strengths, but understanding your power needs will guide you to the right choice.