Category-specific evidence and scores. This is not a universal company score.
ADAC independently tested the DELTA 3 Plus and found strong output, equipment, app configuration, low fan noise, and favorable electrical safety behavior, placing it second in the cohort.
Last verified 2026-08-20
Profile answer
EcoFlow is ranked #3 in Portable Power Station Companies with a score of 90.1 out of 100. Evidence coverage is 100% and confidence is high. This result is specific to that category's frozen rubric.
ADAC independently tested the DELTA 3 Plus and found strong output, equipment, app configuration, low fan noise, and favorable electrical safety behavior, placing it second in the cohort. [2]
UL Solutions distinguishes UL 2743 portable power packs from UL 9540 stationary energy-storage systems and explains why certification scope must match intended installation. [1]
The DELTA Pro 3 documents 4kWh LFP capacity, 4kW output, expansion, 10ms backup switching, model-level UL 9540, UL 9540A and UL 1973 claims, BMS monitoring, and a five-year warranty. [1]
Criterion score breakdown
Criterion
Weight
Score
Real-world power performance
22%
20.9
Battery longevity, reliability, and safety evidence
18%
14.4
Normalized long-term value
13%
10.4
Charging, solar, expansion, and output capability
20%
20.0
Warranty, returns, and support
10%
9.0
Portfolio breadth and independent market evidence
9%
9.0
Documentation and transparency
8%
6.4
Strengths
EcoFlow receives 5/5 for charging, solar, expansion, and output capability. RIVER through DELTA Pro systems provide leading fast charging, solar, expansion, app control, RV, UPS, and home-backup integration. [2]
EcoFlow receives 5/5 for portfolio breadth and independent market evidence. EcoFlow has category-leading breadth and extensive current independent coverage across compact and home-backup tiers. [2]
EcoFlow receives 4.75/5 for real-world power performance. ADAC measured strong output, configuration, charging, and quiet operation from the representative DELTA 3 Plus. [2]
EcoFlow receives 4.5/5 for warranty, returns, and support. Many current models receive five-year coverage with accessible U.S. support, subject to model and registration terms. [1]
Capabilities
EcoFlow receives 5/5 for charging, solar, expansion, and output capability. RIVER through DELTA Pro systems provide leading fast charging, solar, expansion, app control, RV, UPS, and home-backup integration. [2]
Pricing
EcoFlow receives 4/5 for normalized long-term value. The portfolio offers competitive capability and lifecycle value, though higher-end list prices and accessory costs prevent a category-leading value score. [2]
Support and warranty
EcoFlow receives 4.5/5 for warranty, returns, and support. Many current models receive five-year coverage with accessible U.S. support, subject to model and registration terms. [1]
Integrations and certifications
UL Solutions distinguishes UL 2743 portable power packs from UL 9540 stationary energy-storage systems and explains why certification scope must match intended installation. [1]
The DELTA Pro 3 documents 4kWh LFP capacity, 4kW output, expansion, 10ms backup switching, model-level UL 9540, UL 9540A and UL 1973 claims, BMS monitoring, and a five-year warranty. [1]