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Solar · EcoFlow

Solar panels for the EcoFlow DELTA Pro

Written by Ian Schneider·Solar & Off-Grid Tester

The DELTA Pro has one solar input, and EcoFlow drew it wide. 11 to 150 volts, 15 amps, 1600 W, through the same socket the car charging cable uses. The DELTA 2 and DELTA 3 families stop at 60 volts. Thirty-one of the forty-one panels we track have a published voltage, eight of them EcoFlow's own, and the tallest of the thirty-one reads 52.63. On its own, nothing we track gets near the ceiling.

That ceiling is for strings. Wire panels in series, the positive lead of one into the negative of the next, and the station sees their voltages added while the current stays at one panel's worth. On a 60 V station, two of Renogy's 590 W rigid panels in series are already over. On the DELTA Pro the pair fits with room to spare.

Behind the socket is 3600 Wh, and nothing we track fills the input. The biggest set we can build is three of Anker's SOLIX 440W Rigid panels, 950 W delivered, with the battery full in a little under four hours of good sun. One 200 W folding panel gives about 144 W and needs about twenty-five hours. At the cabin I'd run the three as one string and then watch the pines. A series string slows to the pace of its most shaded panel, and the shadow that crosses one panel by mid-afternoon takes the whole string with it.

The door
11–150 V
Its width
1600 W
Plug
Full battery, best case
~2.3 h
EcoFlow DELTA Pro portable power station
EcoFlow's port diagram labels it the Solar/car charging input port and stops there. One EcoFlow page points at an XT60 cable, the yellow DC plug most solar leads end in, and another at the XT60i. Our catalogue says XT60, and we have not put a plug in it to check.

The door

Every panel we track, lined up at the DELTA Pro's solar input

Every panel we track with a published voltage, in a line by that voltage. The figure is the open-circuit voltage, Voc on the back label, the most a panel will ever show the station, which is in sun with nothing connected. The black line is 150 V. The tallest bar, Renogy's 590 W rigid, reaches 52.63. Above it is a lot of empty chart.

That space is for strings. Each bar is one panel. Put two in series and the station sees one bar twice as tall. Three, and it sees three stacked. Stack as many bars as you have panels and see whether the stack clears the line. Two of the Renogy 590s do. Three do not.

The pale cap on each bar is the extra voltage a −10 °C morning adds, about 10%. On one panel it changes nothing here. On a string it is 10% of the whole stack. My deck in January gives the honest reading. A string that clears the line in July has not been tested yet.

Hover a bar and it names its panel. If yours is not in the catalogue, type its Voc into the box and the chart adds it to the line, one bar high. The stacking is yours to do.

Swipe sideways for the whole line-up.

050100150200volts, open-circuit+1++yours?150 V · the lintel11 V · the step

Hover or tap a bar for the panel’s name and its verdict.

  • Fits through the door
  • Too tall
  • Extra height on a −10 °C morning
  • Maker prints only the operating voltage; the real height is above the dashes
  • 1Our pick: Anker SOLIX 440W Rigid

What we'd buy

The best solar panel for the DELTA Pro

Picked by the numbers on this station, not by brand.

Best overall

Anker SOLIX 440W Rigid Solar Panel

3 panels deliver 950 W.

Check price at Anker

Best value

Eco-Worthy 195W N-Type 18BB Bifacial Solar Panel (GW-L02M195NTM)

About $0.93 for every watt it actually delivers here. 6 panels deliver 842 W.

Check price at Eco-Worthy

Best to carry

Renogy 200W Portable Solar Panel Blanket (RPP200SB-SE)

144 W from a 8.82 lb panel, the most delivered watts per pound.

Check price at Renogy

A day on solar

How long the DELTA Pro takes to charge on solar

A little over two hours, with the full 1600 W arriving. Nothing we track delivers that. The nearest is 950 W, from three Anker SOLIX 440W Rigid panels or six EcoFlow NextGen 220W Bifacial folders, and either has the battery full in a little under four hours.

One 200 W folding panel gives about 144 W in real sun and needs about twenty-five hours. One 100 W panel gives about 72 W and needs about fifty. A good day has 3 to 6 hours of sun that strong. The 200 W panel is most of a week. The 100 W panel is closer to two, and I wouldn't start that in November. The system builder turns the hours into days for your state and your month.

a good day's sun: 3 to 6 h0 h1 h2 h3 h4 h5 h6 h7 h8 h9 h10 h11 h12 h13 h14 h15 h16 h17 h18 h19 h20 h21 h22 h23 h24 h25 h26 h27 h28 h29 h30 h31 h32 h33 h34 h35 h36 h37 h38 h39 h40 h41 h42 h43 h44 h45 h46 h47 h48 h49 h50 h51 hInput full (1600 W) · full in 2.3 hOne 200 W panel (144 W delivered) · full in 25 hOne 100 W panel (72 W delivered) · full in 50 h

Hours of good sun, from empty. Where you live and the month decide how many of those a day gives; the system builder works it out.

Every panel that fits

Solar panels compatible with the DELTA Pro

Thirty-one fit, eight of them EcoFlow's own. For each: what a single panel delivers in good sun, and the most the DELTA Pro will take from a set of them. The cable column is blank on this page. EcoFlow never names the socket as a specification and we don't guess a plug. Most rigid panels end in MC4, the black weatherproof connectors on the back of nearly every rooftop panel, and most folding panels end in a barrel plug or an XT60. Whichever lead yours needs, it is not in the box. The sets run from two rigid panels to six folders. Sorted by delivered watts.

Own a panel that isn't in the line-up?

Type its voltage into the door chart above for the height test, then put the rest of the label into the panel checker, already set to the DELTA Pro, for current and plug too. Or build the whole system to see how it keeps up where you live.

The plain answers

How long does the DELTA Pro take to charge on solar?

One 100 W panel delivers about 72 W in good sun and refills the 3600 Wh battery from empty in about 50 hours.

One 200 W panel delivers about 144 W in good sun and refills the 3600 Wh battery from empty in about 25 hours.

At its 1600 W solar limit it refills in about 2.3 hours. More panel watts than that won't charge it any faster.

A day gives three to six hours of sun that good, depending on season and place, so one 100 W panel takes 9 to 17 days to fill it. The system builder works it out for your state and month.

What adapter does the DELTA Pro need for solar?

Every panel we track needs a cable to reach its input. None comes in the box.

31 panels don't have a named plug from their maker, so check the lead before you buy a cable.

Can you use non-EcoFlow solar panels with the DELTA Pro?

Yes. What decides it is the panel's voltage and plug, not the brand. 23 panels from Renogy, Jackery, Anker SOLIX, BLUETTI, Eco-Worthy and Rich Solar work with it, as long as the panel stays under 150 V on a cold morning and starts above 11 V.

The strongest single panels here are the Renogy 590W N-Type Bifacial (425 W delivered) and the Jackery SolarSaga 500 X (360 W delivered).

Can you connect two solar panels to the DELTA Pro?

Yes, joined into one input with a series or parallel cable.

Wired in series, up to 3 BLUETTI PV100 FX Flexible panels fit under its 150 V limit, even on a -10°C morning. Series adds voltage; parallel adds current.

Past 1600 W delivered, more panels only help on cloudy days.

What is the DELTA Pro's solar input?

Solar/car charging input port (spec row: "Solar Charger"): 11–150 V, up to 15 A, 1600 W.

Input limits from EcoFlow's documents, checked 2026-09-18 (source). Delivered watts assume 72% of the panel's rating in good sun.