Summary: Unless I unplug and plug in my solar input DC7909 cable into my EB150 in the morning after the sun has risen, the unit will not charge for the whole day. An in-line Watt mater shows ~41V open circuit when this is happening. Additionally, the EB150 won’t turn on when I long-press the power button until I remove the DC input cable and re-insert it.
Video of the issue (filmed just after sunrise at 8:45am): Bluetti EB150 Solar Input Problem - YouTube
- The polarity is correct, else the unit wouldn’t charge after I merely re-insert the DC cable
- I’m using the provided MC4 to DC7909 that came with my EB150
- I’ve used my EB150 for 3 weeks and have had this happen almost every single day
- My solar panel setup is as follows: 2 Renogy 100W suitcases in series on one string and 2 Golabs 100W SF100 panels in series on another string. Both strings are then combined in parallel into my EB150. The open circuit voltage difference between the two strings is 3-4V as measured. I know this isn’t ideal, but ultimately I still generate more electricity than if I didn’t do this.
- At 8:45am when I filmed this I don’t expect many input watts, plus there were some clouds in the sky which is why after re-inserting the DC plug there wasn’t much energy going in.
I’m going to write to Bluetti support but wanted to get your opinions as well.