The EcoFlow DELTA 3 Ultra takes up to 800 W of solar through one solar input (11–60 V, 18 A, 800 W). The quickest refill from a maker panel on sale today: 1 × Jackery SolarSaga 500 X, 1 panel on the solar input, which brings it to 500 W and refills its 3,072 Wh in about 6.1 h of full sun.
Solar limit
800W
Fastest refill
6.1h of sun
Panels
1× 500 W
The panels cost $799 at Jackery, checked Oct 11, 2026. At a more typical 70% panel yield the refill takes about 8.8 h. Every arrangement here keeps the panels' open-circuit voltage under the limit on a -10 °C (14 °F) morning. Every panel we track.
1 × Jackery SolarSaga 500 X on the EcoFlow DELTA 3 Ultra: 1 panel on the solar input; 500 W in.
EcoFlow DELTA 3 Ultra: solar input limits from EcoFlow
solar input
11 to 60 V, 18 A max, 800 W
All inputs together
800 W
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 3 Ultra
11 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 3 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
EcoFlow does not list a solar cable in the station's own box, so check the panel's box or buy the cable for its plug.
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 3 Ultra holds 3,072 Wh
Setup
3 h of sun
4 h of sun
5 h of sun
6 h of sun
1 × Jackery SolarSaga 500 X
1,050 Wh34% of the battery
1,400 Wh46% of the battery
1,750 Wh57% of the battery
2,100 Wh68% of the battery
1 × EcoFlow 400W
840 Wh27% of the battery
1,120 Wh36% of the battery
1,400 Wh46% of the battery
1,680 Wh55% of the battery
Check another panel on the DELTA 3 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 3 Ultra takes, and how to wire them.
EcoFlow product page: "Solar input: 11-60V⎓18A MAX, 800W" · "Solar/DC input port" · "Ensure that the total voltage does not exceed the power station's maximum input limit."
EcoFlow product page: "Solar charging: 800W max" · "both models have universal solar charging ports"
Panel figures: each panel's own page links its maker's spec sheet.
