Will the EcoFlow 175W Rigid Solar Panel work with the EcoFlow DELTA Pro Ultra?
No. Open-circuit voltage 25.5V is below the 80V minimum for this input, so it will not start charging. Two panels: works (2 panels in series on Low-PV), about 350 W.
Don't connect
Do not plug this in. Open-circuit voltage 25.5V is below the 80V minimum for this input, so it will not start charging.
- Open-circuit voltage 25.5V is below the 80V minimum for this input, so it will not start charging.
- EcoFlow's spec table labels the 7.85 A figure as a voltage; it is the operating current.
175 W, open-circuit 25.5 V, short-circuit 8.3 A, working 22.3 V / 7.9 A. Brand page Panel details
EcoFlow DELTA Pro UltraSolar input High-PV: 80 to 450 V; Low-PV: 30 to 150 V, 5600 W max. Brand page Station details
Change the count or temperatureTwo panels: every way to wire them
| Wiring | Input | Volts at 20F | Amps | Watts | Verdict |
|---|---|---|---|---|---|
| 2 panels in series on Low-PV Best option | Low-PV | 55.8 | 7.9 | 350 | Works |
| 1 panel on High-PV + 1 panel on Low-PV Open-circuit voltage 25.5V is below the 80V minimum for this input, so it will not start charging. | High-PV + Low-PV | 27.9 | 7.9 | 0 | Don't connect |
| 2 panels in parallel on High-PV Open-circuit voltage 25.5V is below the 80V minimum for this input, so it will not start charging. | High-PV | 27.9 | 15.7 | 0 | Don't connect |
| 2 panels in series on High-PV Open-circuit voltage 51V is below the 80V minimum for this input, so it will not start charging. | High-PV | 55.8 | 7.9 | 0 | Don't connect |
| 2 panels in parallel on Low-PV Open-circuit voltage 25.5V is below the 30V minimum for this input, so it will not start charging. | Low-PV | 27.9 | 15.7 | 0 | Don't connect |
Quick answers
Will the EcoFlow 175W Rigid Solar Panel work with the EcoFlow DELTA Pro Ultra?
No. Open-circuit voltage 25.5V is below the 80V minimum for this input, so it will not start charging. Two panels: works (2 panels in series on Low-PV), about 350 W.
Can I connect two 175W Rigid Solar Panel panels to the DELTA Pro Ultra?
Yes, 2 panels in series on Low-PV. That gives about 350 W.
Is it safe on a cold morning?
Panel voltage rises in the cold. One 175W Rigid Solar Panel goes from 25.5 V on its label to about 27.9 V at 20°F and 28.8 V at 0°F. The DELTA Pro Ultra accepts up to 450 V on the High-PV.
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Other panels that work with the DELTA Pro Ultra
- EcoFlow DELTA Pro Ultra: solar input 80 to 450 V on the Solar in 1 (High-PV). EcoFlow sets this limit on open-circuit voltage (Voc), so we hold the panels' Voc on your coldest morning to it.
- Cold raises panel voltage: we add 0.30% per °C below 77F (25°C), a typical figure, since this panel does not publish its own. At 20F one panel's 25.5 V becomes 27.9 V.
- Current over the 15 A cap is safe: the station takes 15 A and you get fewer watts. We count only the capped watts.
- Max 4,000 W on this input, 5,600 W across all inputs.
- Cold-morning voltage uses 0.30% per °C, typical for crystalline panels. This panel's own value is not published.
- Expected watts are the best case in full sun. Real-world midday output is usually 60 to 80% of that.