The EcoFlow DELTA Pro Ultra takes up to 5,600 W of solar through a high-voltage solar input (80–450 V, 15 A, 4,000 W) and a low-voltage solar input (30–150 V, 15 A, 1,600 W). The quickest refill from a maker panel on sale today: 8 × BLUETTI SORA 500, 6 in series on the high-voltage solar input, plus 2 in series on the low-voltage solar input, which brings it to 4,000 W and refills its 6,144 Wh in about 1.5 h of full sun.
Solar limit
5,600W
Fastest refill
1.5h of sun
Panels
8× 500 W
The panels cost $6,792 at BLUETTI, checked Oct 11, 2026. At a more typical 70% panel yield the refill takes about 2.2 h. Every arrangement here keeps the panels' open-circuit voltage under the limit on a -10 °C (14 °F) morning. Every panel we track.
8 × BLUETTI SORA 500 on the EcoFlow DELTA Pro Ultra: 6 in series on the high-voltage solar input, plus 2 in series on the low-voltage solar input; 4,000 W in.
EcoFlow DELTA Pro Ultra: solar input limits from EcoFlow
high-voltage solar input
80 to 450 V, 15 A max, 4,000 W, MC4 plug
low-voltage solar input
30 to 150 V, 15 A max, 1,600 W
All inputs together
5,600 W (EcoFlow: "Total 5600W, 2 ports")
Two panels in series add their voltages; strings in parallel add their currents. A panel's open-circuit voltage (Voc) rises on cold, bright mornings, so each arrangement below is checked with the panel's own temperature coefficient, or -0.35% per °C where the maker publishes none, at -10 °C (14 °F). Strings in parallel are kept within the input's current figure; a single string that could give more is held back by the input itself.
Every maker panel we track, on the DELTA Pro Ultra
5 of the 18 panels fit, fastest refill first. Each uses every input that can take it; the hours are full sun, from empty.
Maker panels on the EcoFlow DELTA Pro Ultra; prices Oct 11, 2026
"Full sun to refill" is the ideal floor: the station taking its input limit every hour. Panels rarely deliver their rating, so the 70% column is closer to a good day, and a usable day holds four to six hours of full sun in most of the US. Panels whose maker does not name an MC4 plug are counted one to an input, since they link to others only through the maker's own adapters.
Cables between panel and station
BLUETTI PV350 and other panels with the same plug: MC4 on both, so the panel plugs straight in. Its cable: 20A MC4 to XT60 Solar Charging Cable (1.5m).
Panels in series need no extra part: each panel's positive MC4 plug clicks into the next panel's negative.
What a day of sun puts back
Watt-hours back in a day, at a 70% panel yield and the station's input limit. Winter in the northern US gives about 3 hours of full sun, a clear summer day in the Southwest 6 or more.
Watt-hours back per day; the DELTA Pro Ultra holds 6,144 Wh
Setup
3 h of sun
4 h of sun
5 h of sun
6 h of sun
8 × BLUETTI SORA 500
6,144 Wha full refill
6,144 Wha full refill
6,144 Wha full refill
6,144 Wha full refill
8 × EcoFlow 400W
6,144 Wha full refill
6,144 Wha full refill
6,144 Wha full refill
6,144 Wha full refill
1 × Jackery SolarSaga 500 X
1,050 Wh17% of the battery
1,400 Wh23% of the battery
1,750 Wh28% of the battery
2,100 Wh34% of the battery
Check another panel on the DELTA Pro Ultra
Type the figures from the panel's label or spec sheet (they are given at 25 °C). The check assumes MC4 plugs, so panels can go in series or parallel.
Enter the four figures to see how many of these panels the DELTA Pro Ultra takes, and how to wire them.
