Periodically there have been questions about how does the Delta Mini/Max/Pro know when it’s charging by car and limit the current to 8A, and when it’s charging by solar and thus allow the unit’s max current limit (10A for DMin/Max, 15A for DPro). The secret is in the XT60i connector. In the car charging cable, the center pin is bridged with the main pin on the square side (+) of the connector. On the solar charging cable, the center pin is bridged with main pin on the angled side (-) of the connector. This way, the Delta Mini/Max/Pro can automatically adjust the current limit depending on which cord is connected. If you use another cable with a standard XT60 connector (no center pin), the unit will default to the 8A limit just to be safe. There have been a lot of confusion about the XT60i (orange connector) vs XT60 (yellow connector) solar cable, and whether XT60 solar cable is able to charge at more than 8 Amps of charge current. 1) XT60i cable allows more than 8A of charging with any DC power source (solar or otherwise). 2) XT60 cable allows more than 8A of charging with *ONLY SOLAR PANELS*, but not with Switched Mode Power Supply (SMPS) or standalone battery. The official word from EcoFlow engineers is that the XT60 solar cable should be able to charge at more than 8A *WHEN USED WITH A SOLAR PANEL*. Why is this distinction important? Please see below: XT60i solar cable - This is the solar cable with the orange connector at the end. This cable will ALWAYS allow for more than 8A, regardless of whether you are using it with solar panels or with an AC-DC SMPS (Switched Mode Power Supply). XT60 solar cable *WITH SOLAR PANEL* - This is the solar cable with the yellow connector at the end. This will allow more than 8A charging via solar panel. From my testing with a Delta 2 and the 220W bifacial solar panel, the charge current is over 8A. EF engineering has said that occasionally the power station may mis-identify the XT60 cable and limit it to 8A, but you can unplug and replug to get it to recognize the cable. But I have tested it multiple times, and it worked at over 8A each time.
As I know for ecoflow battery, the centre pin is used as a control signal, to tell if it's solar cable plug (centre pin is negative) or 12v cigarette plug (centre pin is positive).
Can confirm I learned this today elsewhere and am looking for info. Apparently I have been using regular XT60 connectors and not been getting the solar yields I could have been getting. No word of this in the manual or any documentation. Learned it on RU-vid.
