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Accessories › EcoFlow DELTA Pro Ultra
EcoFlow DELTA Pro Ultra accessories
The solar panels and add-on batteries that EcoFlow itself sells for the DELTA Pro Ultra. We list an accessory only where the maker states the pairing, and show that statement, its source and the date we last confirmed it.
Solar panels
| Panel | Price | One panel refills it in (est.) | Why it's listed | |
|---|---|---|---|---|
| EcoFlow 400W Portable Solar Panel 400W | $599 2026-10-11 | 20 sun-hours | EcoFlow sells the DELTA Pro Ultra with it as a kit: “DELTA Pro Ultra + 2 × 400W Portable Solar Panels” (source, confirmed 2026-10-11) |
Refill time is our estimate, not a test: 6,144Wh ÷ (panel watts × 75% real-world output). A "sun-hour" is an hour of strong, direct sun; most of the US gets 3–5 a day, fewer in winter. The DELTA Pro Ultra accepts up to 5,600W of solar in total (EcoFlow's figure), so more panels charge it faster up to that limit; check the manual for how to connect more than one. Prices are EcoFlow's store prices on the date shown.
Add-on batteries
| Battery | Price | Capacity with one added | Fridge runtime with it (est.) | Why it's listed | |
|---|---|---|---|---|---|
| EcoFlow DELTA Pro Ultra Series Smart Extra Battery 6,144Wh | $2,399 2026-10-11 | 12,288 Wh from 6,144 | 8.3 days from 4.1 days | EcoFlow's listing says so: “Compatible with DELTA Pro Ultra and DELTA Pro Ultra X Inverters” (source, confirmed 2026-10-11) |
Capacities are EcoFlow's published figures. Fridge runtime is our estimate (full-size fridge, 85% inverter efficiency), not a test. EcoFlow says the DELTA Pro Ultra can be expanded to 90,000Wh in total.
Back to the EcoFlow DELTA Pro Ultra, or size a whole setup with solar and add-on batteries in the home backup planner.