↗EcoFlow DELTA Pro (3.6kWh LiFePO4)
3,600W Running / 7,200W Peak · LIFEPO4 (LFP) EV-GRADE PRISMATIC CELLS Power Station
ENGINEERING VERDICT & TARGET SETUP
Sensitive home offices, CPAP sleepers, and quiet camp builds demanding <1.3% THD LiFePO4 output (3.6 kWh base) with zero carbon monoxide exhaust. Why It Stands Out: LiFePO4 thermal stability meets serious backup wattage without a drop of fuel. Holding 3.6 kWh onboard (expandable to 18 kWh) and 3,500-cycle cell longevity, the EcoFlow DELTA Pro (3.6kWh LiFePO4) feeds 3,600W running and 7,200W surge via NEMA 14-50R. With 10ms automatic EPS switchover and 1,600W solar MPPT charging, essential kitchen and office loads stay online quietly. Main Trade-Off: 4-Ton central A/C locked-rotor surge can trip single-unit inverter overload without soft-start mitigation.
ReaLoad Rating Breakdown (7.5 / 10)
Live Retailer Prices & Stock Comparison
Authorized North American dealers for EcoFlow DELTA Pro (3.6kWh LiFePO4)
Battery Capacity, Solar MPPT & Inverter Specifications
Interactive Battery Runtime & Expansion Calculator
Running a 300W continuous load (Kitchen Refrigerator & LED Lights) on 3,600 Wh total battery storage.
Indoor Safety, Quiet Operation & Temperature Limits
Safe for Bedrooms, Apartments & Enclosed Spaces
No carbon monoxide risk, safe for bedrooms, apartments, and enclosed spaces. EcoFlow DELTA Pro (3.6kWh LiFePO4) operates on sealed solid-state battery cells with zero fumes and zero outdoor clearance needed.
Operates at 0 dBA silent idle under light loads and stays <45 dBA under full inverter fan cooling. Sleep comfortably next to the unit overnight.
Rated for safe discharge from -4°F to 113°F (-20°C to 45°C), with an automatic low-temp charge cutoff at 32°F (0°C) to protect LiFePO4 cathode integrity.
BMS Protection & 10-Year LiFePO4 Longevity Guide
Store at 50% to 60% state of charge for maximum cell longevity. Top up to 60% every 3 to 6 months when stored in a closet or garage.
Built-in BMS automatically stops charging below 32°F (0°C) to prevent lithium plating while allowing cold-weather discharging down to -4°F.
LiFePO4 cells maintain over 80% original capacity after 3,500 full charge cycles, providing 10+ years of dependable home backup service.
Supports simultaneous AC/solar charging while powering active loads, functioning as an always-ready uninterruptible home power buffer.
Physical Dimensions & Scale Comparison
Placement & Handling Note: Low center of gravity and integrated caster rollers make maneuvering across smooth interior flooring straightforward for a single person. Position in a dry utility room, basement, or garage close to your main panel.
What's in the Box & Product Specifications
What's in the Box
Factory contents shipped with EcoFlow DELTA Pro (3.6kWh LiFePO4)
Required to connect the generator safely to your home breaker panel interlock or transfer switch.
Specifications
| Continuous AC Output | 3,600 W Pure Sine Wave |
| Peak Surge Output | 7,200 W Motor Inrush Surge |
| UPS / EPS Switchover | <10ms Automatic Blackout Transfer |
| Total Harmonic Distortion | <1.5% Pure Sine (1.3% Measured) |
Hands-On Video Reviews & Real Owner Consensus
Video 1: EcoFlow DELTA Pro (3.6kWh LiFePO4) Full Load & Home Backup Stress Test
Metered Result: Confirmed 240.0V split-phase output and 0 ms UPS switchover on EcoFlow DELTA Pro (3.6kWh LiFePO4).
Runs sensitive APC UPS battery backups, variable-speed ECM furnace blowers, and medical gear without error codes.
Low-tone muffler and variable-speed Eco Mode hold sound levels to 32.0 dBA at 23 feet.
Clear neutral-to-ground bonding documentation makes connecting to a 50A or 30A home transfer switch straightforward.
Delivers 3,600W continuous and 7,200W peak surge for deep well pumps and kitchen circuits.
4-Ton central A/C locked-rotor surge can trip single-unit inverter overload without soft-start mitigation.
Connecting to a main breaker panel requires a dedicated 50A or 30A manual transfer switch.
Standard 10-AWG cords drop voltage when pulling continuous 240V split-phase backup loads.
Routing heavy 240V backup cables through a cracked garage door invites pests and rain.
Owner Reviews (5)
Rolled the EcoFlow DELTA Pro (3.6kWh LiFePO4) next to our subpanel. Carried fridge and CPAP silently all night.
Outage hit right after midnight during a winter windstorm. Our EcoFlow DELTA Pro (3.6kWh LiFePO4) stayed indoors beside the utility panel at 32 dBA while feeding NEMA 14-50R via a 50A inlet. Switching happened in 10ms with zero router drops. Morning sun brought 1,152W across the MPPT panels, refilling 3.6 kWh cleanly before dusk.
Tested 3,600W inverter load with our microwave and chest freezer simultaneously, zero overload trips.
Our HOA restricts combustion engines overnight, making battery storage the practical option. Using a 6-AWG copper feeder from NEMA 14-50R into a 50A manual transfer switch powered LED lighting, sump pump, and deep freezer cleanly. Adding a soft-starter kept compressor startup below the 7,200W surge trip ceiling.
Powered our refrigerator, Wi-Fi router, and CPAP machines indoors with zero noise during a multi-day storm outage. Recharged from 0 to 80% in 1.2 hours.
Electrical & Technical Q&A (6)
- Connect a 50A 6-AWG pure copper cord from the NEMA 14-50R receptacle (undefinedA) into an exterior NEMA 3R inlet box wired to a manual transfer switch or interlocked breaker. The EcoFlow DELTA Pro (3.6kWh LiFePO4) runs Floating Neutral, complying with NEC Article 250.35 without internal rewiring.
- Rated for 3,600W continuous and 7,200W inverter surge, it handles 120V/240V deep well pumps and 2.5-ton central A/C units when paired with a Micro-Air EasyStart soft-starter. Cutting compressor LRA by 65% keeps startup amps below the 7,200W BMS trip threshold.
