Portable power and solar generators

Which Numbers Matter More Than Watts When Pairing a Panel With a Power Station?

Published September 23, 2026 · By the SolarPanelX editors · Prices and specs as of that date, from the pages under Sources

Summary

The voltage and current window on the power station's solar input. EcoFlow's DELTA 2 manual lists that input as 11 to 60 V, 15 A max, 500 W max, and asks owners to confirm the panel's output voltage is within 60 V before connecting. A panel under 500 W can still fall outside the input conditions on voltage.

The panel side of the equation

Panels sold for similar jobs can carry very different electrical ratings.

Panel	Rating	Open-circuit voltage (Voc)	Short-circuit current (Isc)
Renogy 100W Lightweight Flexible (Black Division)	100 W	23.5 V	5.51 A
BougeRV Arch Pro 100W	100 W	37.8 V	3.2 A
Qcells Q.PEAK DUO BLK ML-G10+, a rooftop module	400 W	45.30 V	11.14 A

Datasheet values are measured at standard test conditions with a 25 °C cell, and Voc climbs in the cold. BougeRV gives a Voc temperature coefficient of −0.3%/K, so at a 0 °C cell the Voc works out about 7.5% higher, near 40.6 V. Qcells lists −0.27%/K for its module. When several panels are wired together, the 60 V limit still applies to whatever arrives at the input port.

Then watts and weight

Once voltage and current fit, watts set the charging speed, up to the input ceiling. DELTA 2 accepts 500 W at most, so a larger array will not charge it faster than that. The two flexible 100 W panels weigh 2.4 kg (Renogy) and 2.1 kg (BougeRV). SolarPanelX does not certify panel and power station pairings; the specifications from both manufacturers decide.

Shopping for one? Browse portable power stations →

Sources

We have not tested these products. Specs, prices, stock and terms are as published on these pages on the date above and can change; check the manufacturer or retailer before you buy.

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