4000-Watt Output

EcoFlow DELTA Pro 3 solar generator paired with two 400W solar panels provides a complete off-grid power system — the DELTA Pro 3's 4096Wh LFP battery with 4000W AC output handles whole-home essential loads, and the 800W solar panel array recharges the battery in 5-6 sun hours to sustain daily energy consumption. This bundle eliminates the separate sourcing of panels, cables, and adapters for users setting up a solar backup system from scratch.

800W Solar Input for Daily Recharge

800W of solar input in 5 peak sun hours generates approximately 3,500-4,000Wh of energy — close to the DELTA Pro 3's full 4096Wh capacity from a single day of good sun. This means a household running essential loads at 300-400W sustained (roughly 2,400-3,200Wh per day) can maintain full battery capacity daily in good sun conditions without grid power. Cloudy days reduce solar harvest by 70-90% — the system provides buffer through its battery capacity, but multi-day overcast conditions in high-load scenarios will deplete the battery without supplemental grid or generator input.

• 4096Wh LFP battery — full-day essential load backup without solar
• 4000W AC output — runs central AC, well pumps, and large appliances
• Two 400W solar panels included — 800W array for daily recharge in sun
• Expandable to 12kWh — add EcoFlow Smart Extra Batteries for more storage
• Smart EMS — automatically manages loads to prevent overload

DELTA Pro 3 vs. DELTA 2 Max for Whole-Home Use

DELTA 2 Max (2046Wh, 2400W): covers essential loads for 5-7 hours; appropriate for typical outage scenarios under 24 hours with solar recharge. DELTA Pro 3 (4096Wh, 4000W): covers essential loads for 10-14 hours; appropriate for multi-day outages, larger home essential load sets, and scenarios requiring 240V appliance support. The Pro 3 also supports expansion to 12kWh, making it a viable long-term whole-home energy system rather than purely a backup device. The panel bundle makes this the most practical entry point for a complete solar backup system.