Photo Credit: Kevin L @ EcoFlow DELTA Facebook Group
Do Not Do This...Unless You Want Magic Black Smoke
You purchased a new Delta Pro and looked up the specifications - Delta Pro can take up to 1600w/150v/15a of solar input. Then you buy four EcoFlow 400w Rigid solar panels to plug them in series.
You check the math
37.1v VoC × 4 panels = 148.4v
... just under the 150v Delta Pro solar input limit. The new solar array is right at the watt limit, just under the volt limit, and a little under the amp limit. You think you are good to go, right?
Wrong!!!
This will likely create black magic smoke from your solar generator on the first cold and sunny day. This is because solar panel voltages increase as temperatures drop. We see many complaints from newbee EcoFlow customers who are all excited with their new toy, they proceed destroy their MPPT controller, then complain bitterly on social media about EcoFlow's customer support and voided warranty policy. Plugging in four 400w solar panels in series is similar to filling your gasoline powered car with diesel and wondering why the car manufacturer isn't replacing your new car.