Recently bought a 180W panel for my Anker C300 and it delivers well. Was able to get 50 to 94W. A little heavy but gets the job done. Im so excited to use it during camping and probably use it during power outage.
It is so refreshing to just put the panel out, not optimal angle, and get greater then the panels rating. Zoila 450 watt suitcase panel.
11.8 amps, voltage unknown, 453 watts
BLUETTI EL300 (60V, 22A charge controller).
I will buy 450 watt panel when I catch another flash sale and report back what I get. It will be interesting to see what the charge controller can do, because the two panels will exceed the maximum current.