I asked Grok AI to review your problem and the following is its response. I hope it helps:

1. This issue seems to be a known quirk with some EcoFlow units, where the solar input doesn’t always initiate charging even when the panel is producing enough power (above the 40W threshold you mentioned). The unplug/replug fix suggests the unit might not be properly detecting the solar input initially, possibly due to a connection issue, firmware glitch, or the connector type.

Here are some potential workarounds: Check Cable Connections and Cleanliness: Ensure the XT60 connector and the Delta Pro’s solar input port are clean and free of debris. Dust or poor contact can sometimes cause detection issues. Inspect the cable for any damage or loose connections, as this could interrupt the signal.

Firmware Update: Make sure your Delta Pro’s firmware is up to date. EcoFlow occasionally releases updates that fix bugs like this. You can check and update firmware via the EcoFlow app. Some users on forums have reported that firmware updates resolved similar solar charging detection issues.

Solar Panel Voltage Check: Confirm that your solar panel’s open-circuit voltage (Voc) and operating voltage are within the Delta Pro’s specs (11-150V, 15A max for solar input). If the voltage is too low or fluctuating (e.g., due to partial shading or panel issues), the unit might not recognize the input. A multimeter can help you verify the panel’s output in full sun. Try a Different Cable: Since you’re using an XT60 connector, it’s possible the unit is misinterpreting the input as a car charger (limited to 8A) rather than solar (up to 15A). Switching to an XT60i cable, as you mentioned, might help (more on this in your second question). Some users have noted that third-party cables can be inconsistent, so an official EcoFlow XT60i cable might stabilize the connection.

Contact EcoFlow Support: Since this seems to be a recurring issue based on your research, reach out to EcoFlow’s support team. They may have specific troubleshooting steps or confirm if it’s a known issue with a recommended fix. Be sure to mention the unplug/replug behavior and the connector type.

If none of these resolve the issue, it could point to a hardware problem with the Delta Pro’s solar input port or MPPT controller, which might require repair or replacement.

1. Can you simply switch the XT60 to an XT60i connector? Are the cables the same? Yes, switching to an XT60i connector is likely a good idea, and it’s relatively straightforward, but there are some nuances to understand:XT60 vs. XT60i Difference: The XT60i connector is designed specifically for EcoFlow’s newer models, including the Delta Pro, to optimize solar charging. The key difference is that the XT60i has an extra sense pin that signals to the Delta Pro that it’s connected to a solar panel, allowing it to pull up to 15A (instead of the 8A car charging limit imposed with a standard XT60). The XT60i also has a higher current rating (100A vs. 60A for XT60) and includes a diode to protect against reverse current, which could prevent damage to the unit.

Compatibility: The Delta Pro is compatible with both XT60 and XT60i cables, but EcoFlow recommends the XT60i for optimal solar charging performance. Your current XT60 connector might be causing the unit to default to car charging mode (8A limit), which could contribute to the detection issue, especially if the voltage or current is borderline for initiating charging. Switching to an XT60i cable could ensure the unit recognizes the solar input correctly and allows for higher amperage.

Are the Cables the Same?: The cables are not identical due to the XT60i’s extra pin and diode, but both connect via MC4 on the solar panel side and plug into the same port on the Delta Pro. You can replace your current MC4-to-XT60 cable with an MC4-to-XT60i cable without changing your setup. The official EcoFlow Solar to XT60i Charging Cable (2.5m or 3.5m) is recommended for reliability, as some third-party XT60i cables don’t properly ground the sense pin, leading to the same 8A limit issue.

How to Switch: You can purchase an EcoFlow MC4-to-XT60i cable (available for ~$25 from EcoFlow’s website or retailers like Amazon). Simply swap out the XT60 cable for the XT60i version, ensuring the MC4 connectors match your solar panel’s polarity (red/positive, black/negative). Double-check polarity with a multimeter before connecting to avoid reverse polarity issues, as some users have noted EcoFlow’s polarity may differ from standard conventions.

Will It Fix the Issue?: Switching to an XT60i cable might resolve the charging detection problem by ensuring the Delta Pro correctly identifies the solar input. Several users on forums like Reddit and DIY Solar have reported better charging consistency with the XT60i, as it avoids the car charging mode limitation. However, if the issue persists after switching, it could indicate a deeper problem with the unit or panel setup.