EF ECOFLOW DELTA Pro 3 Portable Power Station
EF ECOFLOW

EF ECOFLOW DELTA Pro 3 Portable Power Station

$1,899.00across 6 retailers

The EF ECOFLOW DELTA Pro 3 Portable Power Station is a powerful and versatile energy solution ideal for those with substantial and varied power needs. Its impressive capacity, smart technology integration, and multiple power source options make it a reliable choice for both residential and outdoor use, albeit at a higher cost and with some portability challenges. For those seeking a comprehensive power system, this product is worth considering.

Model: EFD521UPC: 842783142993Free UPC lookup
Lowest at Amazon
$2,099.00 at Amazon
Price seen Nov 28, 2025
Lowest at any Popular Retailer
$1,899.00 at Walmart
Price seen Sep 27, 2026

Where to Buy

Newest price seen: Nov 9, 2026
RetailerPriceLast seenBuy
Walmart logo
Walmart
Sold by EcoFlow Technology Inc.
$1,899.00Sep 27, 2026, may have changedBuy Now
Amazon logo
Amazon
30-day returns (in store too)
$2,099.00Nov 28, 2025, may have changedBuy Now
Best Buy logo
Best Buy
15-day returns (in store too) · free return shipping · free shipping on $35+
$2,099.00Nov 28, 2025, may have changedBuy Now
R
Renewable Outdoors
$2,184.05Nov 9, 2026Buy Now
C
comforthues.com
$2,219.00Sep 27, 2026, may have changedBuy Now

Prices are collected from retailer listings; each row shows the date we last saw that price. Return and shipping terms are each store's standard policy from our retailer research (April 2026). Some products and categories have different terms, so check with the store before you buy.

Price history summary

Lowest new price we recorded at major retailers (Amazon, Walmart, Best Buy, Target, The Home Depot and Lowes) in the last 90 days: $899.00 at Amazon on Aug 12, 2026.

Range over the last 12 months: $899.00 (Amazon, Aug 12, 2026) to $3,399.00 (Best Buy, Jul 6, 2026). Based on 54 recorded prices since Nov 20, 2025 for offers sold by these retailers themselves (not marketplace sellers). Summary as of Nov 7, 2026.

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Product Score

Calculated by ShopSavvy from the professional reviews and customer ratings we collected for this product.

7.73/10
Overall
8/10
Expert
7.46
Consumer

Why this score?

The EF ECOFLOW DELTA Pro 3 Portable Power Station receives a high score due to its impressive power capacity and versatility, allowing it to efficiently run multiple appliances during outages. However, its substantial weight and high price may deter some users, alongside concerns about its surge protection leading to potential device damage, which were highlighted in customer reviews. Overall, it offers a robust solution for those in need of reliable backup power.

8+ Excellent
6-8 Good
4-6 Average
<4 Poor

Score

The EF ECOFLOW DELTA Pro 3 Portable Power Station receives a high score due to its impressive power capacity and versatility, allowing it to efficiently run multiple appliances during outages. However, its substantial weight and high price may deter some users, alongside concerns about its surge protection leading to potential device damage, which were highlighted in customer reviews. Overall, it offers a robust solution for those in need of reliable backup power.

8/10
Expert
7.46/10
Consumer

Scores

design
8.5
performance
9.25
connectivity
8/10
battery_life
7.8

Pros

  • •High energy capacity with 4000Wh LFP battery, expandable to 48kWh, ideal for handling extensive power needs.
  • •Features a variety of power sources including battery, solar, and gas, offering significant versatility for outdoor or backup use.
  • •Equipped with APP Smart Control, X-BOOST Technology, and X-STREAM Fast Charging, enhancing user experience with smart technology.
  • •Provides ample power output with 4000W AC output, suitable for home use, camping, and emergencies.
  • •Durable construction with a 5-year manufacturer warranty ensures reliability and customer confidence.

Cons

  • •Heavy unit at 99 pounds, which may impact portability.
  • •Runtime of only 2 hours under full load which could be limiting for extended off-grid use.
  • •High price point could be a deterrent for budget-conscious buyers.

Bottom Line

The EF ECOFLOW DELTA Pro 3 Portable Power Station is a powerful and versatile energy solution ideal for those with substantial and varied power needs. Its impressive capacity, smart technology integration, and multiple power source options make it a reliable choice for both residential and outdoor use, albeit at a higher cost and with some portability challenges. For those seeking a comprehensive power system, this product is worth considering.

Read full expert review

What Reviewers Are Saying

Praised
quiet operation9%
excellent backup solution7%
great solar charging7%
user-friendly app7%
good design9%
customer support helpful7%
Criticized
heavy unit14%
needs more accessories2%
display hard to read5%
limited temperature range2%

Discussion

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ShopSavvy compares prices across thousands of retailers so you always get the best deal. Prices are collected from retailer listings, and each one shows the date we last saw it. Our expert reviews and community discussion help you make informed buying decisions.

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