The basic problem I had with the sunflower solar power manager 5v is it can only use 6V panels.
I switched to the larger sunflower solar power manager 9v 12v 18v which allows a much larger range of panels. I have a 2000mAh LiPo connected to this and charge via a 20W 12V panel.
Jaycar 12v 20w solar panel, it says 12V but the measured voltage is 18v with nothing connected. The panel has been on my roof for about 2 years and works really well, every so often I go up to wash the dust and dirt of it.
Cheers
JIm
