The Most Portable Home Solar Battery
The EcoFlow DELTA Pro 3 (EFD521) is a premium, high-capacity portable power station equipped with a massive 4096Wh LiFePO₄ battery, delivering 4000W continuous AC output (8000W surge) and up to 6000W via X-Boost technology, while supporting dual 120V/240V split-phase capability to power nearly all essential home appliances—including high-demand items like 3-ton central AC units, 1 HP water pumps, electric boilers, dryers, or even electric vehicles—making it ideal for whole-home backup during extended outages, off-grid living, RV adventures, job sites, or emergencies.
It charges rapidly from 0-80% in as little as 50 minutes with multi-charge combinations up to 7000W (including AC, solar, car, or generator inputs), features ultra-fast solar input up to 2600W (or higher in expanded setups), and expands dramatically—up to 12kWh per unit with two extra batteries or 48kWh system-wide with multiple units paralleled for scalability to 12kW+ output. With whisper-quiet operation (under 30 dB at loads below 2000W), <10ms UPS switchover for seamless protection of sensitive electronics, IP65-rated battery durability, 4000+ cycles to 80%+ capacity for long-term reliability, app-based Wi-Fi/Bluetooth monitoring and control, multiple ports (including AC, high-power USB-C, USB-A, car, DC5521, and Anderson), and a robust yet portable design (around 51.5 kg with wheels and handles), the DELTA Pro 3 stands out as one of the most powerful and versatile home backup solutions available, blending massive energy storage, extreme output, and smart features for dependable performance in demanding scenarios.
Key Features
Massive Power Output with Dual Voltage
It delivers 4000W continuous AC output (8000W surge) and up to 6000W via X-Boost technology, supporting dual 120V/240V split-phase capability to run nearly any essential household appliance—from high-demand items like 3-ton central AC units and 1 HP water pumps to dryers, EVs, or multiple devices simultaneously—making it exceptionally suited for whole-home backup, heavy-duty tools, or off-grid power needs.
Exceptional Expandability
Starting with a 4096Wh base capacity, the unit expands to 12kWh per single system by adding up to two Smart Extra Batteries, or scales dramatically to 48kWh and 12kW+ output when paralleling multiple DELTA Pro 3 units, providing days to weeks of reliable energy storage for extended outages, remote living, or large-scale applications without sacrificing performance.
Ultra-Fast Multi-Charging Options
It supports rapid charging from 0-80% in as little as 50 minutes using combinations up to 7000W (AC, solar, car, generator, or EV stations), with ultra-high solar input up to 2600W (or more in expanded setups) across multiple methods including seven unique and 18 combo charging paths for quick replenishment in any scenario, from grid blackouts to solar-dependent off-grid use.
Long-Lasting and Safe Battery Design
Powered by premium LiFePO₄ (LFP) cells rated for 4000+ cycles to 80%+ capacity, it offers exceptional longevity (often 10+ years of heavy use) along with enhanced safety through stable chemistry, advanced BMS protection, IP65-rated durability for outdoor exposure, and whisper-quiet operation under 30 dB at loads below 2000W to avoid disturbing environments.
Seamless UPS and Smart Integration
With a <10ms UPS switchover time for uninterrupted power to sensitive electronics like computers or medical devices, it includes full app control via Wi-Fi/Bluetooth for real-time monitoring of battery status, power usage, remote adjustments, and smart features—plus a wide array of ports (AC, high-power USB-C/USB-A, car, DC5521, Anderson) and wheels/handles for practical portability despite its robust 51.5 kg build.
What’s in the Box
- EcoFlow DELTA Pro 3 Portable Power Station
- User Manual
FAQs
How much can I expand the DELTA Pro 3?
Base 4096Wh. Add up to two extra batteries for 12kWh per unit. Parallel up to three units for up to 48kWh total capacity and 12kW+ output.
How fast does it charge?
0–80% in ~50 minutes using multi-input up to 7000W (AC + solar + generator + others). Solar input up to 2600W. Full charge time varies by method but is very quick with combined inputs.
Does it have UPS functionality?
Yes — <10 ms switchover time. Provides seamless backup for computers, NAS, routers, medical devices, and other sensitive electronics during outages when plugged into the wall.
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