Long-Lasting Portable Home Backup. Unmatched Performance.
3600W Output, 7200W Surge—Powerful. Stable. Built to Handle It All
DELTA 3 Ultra Plus (3072Wh) delivers 3600W rated-output (7200W surge) , with X-Boost™ 3.0 technology, it supports devices up to 4600W—effortlessly handling heavy-duty appliances. The inverter samples AC voltage and current every 33μs with high precision with a DSP chip, ensuring a pure sine wave output with beyond grid-level stability—ideal for powering sensitive electronics reliably.
Kitchen
Living Room
Laundry Room
Office
RV Camping
Garage
Easily Scales Up—From Hours to Days
3–11kWh expandable capacity
Compatible with Smart Generators for unlimited runtime
Half-Day Outage
Require connecting 1 × DELTA 3 Ultra Plus + 2 × DELTA 3 Max Plus Smart Extra Battery or 1 × DELTA 3 Ultra Plus + 2 × DELTA Pro 3 Smart Extra Battery with EcoFlow Smart Extra Battery Expansior Adapter. The EcoFlow Extra Battery Expansion Adapter has released US local now.[20]
1-Day Outage
Delivers 1 days of outage protection—ensuring uninterrupted cooking, heating, lighting, and connectivity. [3]
* Require connecting 1 × DELTA 3 Ultra Plus + 2 × DELTA 3 Max Plus Smart Extra Battery or 1 × DELTA 3 Ultra Plus + 2 × DELTA Pro 3 Smart Extra Battery with EcoFlow Smart Extra Battery Expansion Adapter.
2-Day Outage
Powers home essentials for up to 2 days [5] with 7kWh capacity—keeping your kitchen running, lights on, and devices connected. [4]
* Require connecting 1 × DELTA 3 Ultra Plus + 2 × DELTA 3 Max Plus Smart Extra Battery or 1 × DELTA 3 Ultra Plus + 2 × DELTA Pro 3 Smart Extra Battery with EcoFlow Smart Extra Battery Expansion Adapter.
3-Day Outage
Supports a family of four through 3 days of everyday living [3] with 11kWh capacity—keeping food fresh, heat running, lights on, and entertainment devices charged. [5]
* Require connecting 1 × DELTA 3 Ultra Plus + 2 × DELTA 3 Max Plus Smart Extra Battery or 1 × DELTA 3 Ultra Plus + 2 × DELTA Pro 3 Smart Extra Battery with EcoFlow Smart Extra Battery Expansion Adapter.
Go Hybrid—Extend Backup with a Smart Generator
Pair DELTA 3 Ultra Plus (3072Wh) with an EcoFlow Smart Generator [6] to achieve longer runtime—automatically switching between fuel and battery to keep you powered through multi-day outages or off-grid adventure.
Two Easy Ways to Connect to Your Home
6 Ways to Charge Up — Ready in Just 48 Mins [1]
Wall Charging
1800W Input, 0-80% in 89 mins. [9] EcoFlow’s exclusive Storm Guard Mode [10] monitors severe weather alerts and automatically triggers AC charging remotely using industry-leading X-Stream fast charging tech—so it can be ready long before a disaster hits.
Generator Charging
Charges at up to 3200W via smart generator—0–80% in 53 minutes. With exclusive Generator Auto Start/Stop Mode, [11] the EcoFlow Smart Generator 4000 (Dual Fuel) recharges DELTA 3 Ultra Plus automatically when battery levels run low—delivering hands-free backup power for storms, outages, and off-grid use.
Solar Charging
1600W input, 0–80% in 101 mins. After the storm clears, just 101 mins of sunlight is all it takes to recharge DELTA 3 Ultra Plus. Pair it with EcoFlow 400W Solar Panels (25% high-efficiency) for reliable power during camping trips, van life, or off-grid living. [12]
Alternator Charging
1000W Input, 0-80% in 142 mins. With EcoFlow Alternator Charger Plus 1000, [13] get ready in just over 2 hours while on the move—10× faster than conventional solutions. [14]
Solar + Generator Dual Charging
3960W Input, 0-80% in 48 mins. Fastest charge in just 48 mins with 3960W dual input from solar panels and the Smart Generator 4000.
Solar + Alternator Dual Charging
2600W Input, 0-80% in 60 mins. Dual input from 1600W solar and 1000W alternator charging keeps you powered faster than ever, even on the go.
Long-Lasting, Durable, Always Ready for Emergencies
Automotive-Grade Full-Tab LFP Cells
Rugged exterior and intelligent BMS for unmatched reliability
Built to Last
From battery chemistry to structural design, DELTA 3 Ultra Plus (3072Wh) is engineered for extreme durability, environmental resilience, and whisper-quiet performance—delivering power you can count on for over 10 years. [2]
Battery Protection
EcoFlow’s advanced BMS uses a high-performance ARM Cortex chipset and intelligent algorithms to monitor your battery in real time. By tracking SOC, SOH, temperature, and more, it ensures peak performance, extended battery life, and worry-free operation.
CTC Structure
Built with a cell-to-chassis (CTC) structure, DELTA 3 Ultra Plus (3072Wh) is drop-resistant (0.2m) —protecting against overnight condensation and off-road bumps during transport. You get stable power even in the most demanding conditions. [17]
Durable Qualities
DELTA 3 Ultra Plus (3072Wh) keeps your power flowing through freezing cold, scorching heat, humid environments (95% humidity tolerance), or coastal air (5% salt spray resistance). [17]
Class B Certified
Certified to Class B EMC standards, it won’t interfere with TVs, Wi-Fi, or other home electronics.
25dB [18]
Powered by X-Quiet™ 3.0, EcoFlow’s stepless fan control adjusts airflow smoothly to maintain precise thermal regulation—keeping your home or workspace peacefully quiet, even under heavy loads.
Deeper Insights, Easier Control
Monitor your energy usage, savings, and solar generation—all with one intuitive dashboard. Easily track battery status, real-time electricity rates, and financial savings.
Compatibility
What's In The Box
Warranty: 2-Year Unit · 5-Year battery
[1] 0-80% in 48 minutes was measured in optimal conditions using the EcoFlow Smart Generator 4000 (Dual Fuel) and Solar Panels, total 3960W input.
[2] Based on proper product usage, DELTA 3 Ultra Plus (3072Wh) is estimated to have a lifespan of approximately 10 years, according to internal simulation test data. This information is for reference only; actual user experience may vary.
[3] Multiple appliances' backup time based on ideal conditions; actual results may vary.
[4] Require connecting 1*DELTA 3 Ultra Plus + 2* DELTA 3 Max Plus Smart Extra Battery with EcoFlow Smart Extra Battery Expansion Adapter. The EcoFlow Extra Battery Expansion Adapter will be released soon.
[5] Require connecting 1*DELTA 3 Ultra Plus + 2* DELTA Pro 3 Smart Extra Battery with EcoFlow Smart Extra Battery Expansion Adapter. The EcoFlow Extra Battery Expansion Adapter will be released soon.
[6] EcoFlow Smart Generators are sold separately.
[7] Manual Transfer Switch is sold separately.
[8] This accessory should be purchased separately.
[9] All charging speed data comes from EcoFlow labs and is for reference only. The actual data may vary slightly depending on the usage environment, device condition, software version, and other factors.
[10] Feature requires preset activation via the EcoFlow App.
[11] To enable this feature, connect DELTA 3 Ultra Plus (3072Wh) to the Smart Generator using the charging cable and enable the preset in the EcoFlow App. Communication is handled via Bluetooth or Wi-Fi.
[12] EcoFlow Solar Panels are sold separately.
[13] EcoFlow Alternator Charger Plus 1000 will be launched soon and it's sold separately.
[14] Compared with car cigarette port charging.
[15] Refers to the internal resistance of EF Full-Tab LFP Cells being 1.5mΩ, which is 25% lower than the 2mΩ internal resistance of the previous EF #C33 Battery Cell.
[16] A 25% reduction in single-cell internal resistance. According to the heat generation formula Q = I²Rt, under the same current, a 25% reduction in resistance leads to a proportional 25% decrease in heat generation.
[17] Unless otherwise noted, all above data comes from EcoFlow labs and is for reference only. The actual data may vary slightly depending on the usage environment, device condition, software version, and other factors.
[18] Noise levels measured at 1m under 25°C ambient: ≤25dB (600W) for charging/discharging.[19] Unless otherwise noted, all images, videos, and screen display contents about the product itself on this page are for reference only. Actual product effects (including but not limited to appearance, color, and size) and screen display contents (including but not limited to backgrounds, UI, and illustrations) may vary.
[19] Unless otherwise noted, all images, videos, and screen display contents about the product itself on this page are for reference only. Actual product effects (including but not limited to appearance, color, and size) and screen display contents (including but not limited to backgrounds, UI, and illustrations) may vary.
[20] DELTA 3 Ultra Plus works with: DELTA 3 Max Plus Smart Extra Battery, DELTA Pro 3 Smart Extra Battery, EcoFlow 800W Alternator Charger, EcoFlow Alternator Charger 600, EcoFlow Alternator Charger Plus 1000.
