Charges even in cloudy weather or without direct sun!

The panel (15 Watt version) depends on the balcony railing 90degrees smoothly down towards the west side.
With clear skies it loads already at 8:00 clock with about 100mAh noon to 300mAh
When the sun from 14 clock appears on the panel loads it with more than 1000mAh! More
Power takes my bank not to. (IHarbort® 10000mAh Dual USB Port External Battery)
So when clear skies come ca 7000mAh together on the day. If it is cloudy day
ca. 3000-5000 mAh. A test with a 2. Power Bank on 2 parallel connection to the high performance with Sun
capture is in progress but it will both banks charged simultaneously.

Important some benches Power switch off if there is insufficient charging current and do not restart!