HubiRetro - 1 - WinterExpansionPanel (10w) HubiRetro - 1 - Winter Expansio...Hubi Retro - 1 - Winter Expansion Panel (10w) Hubi Retro - 1 - Winter Expansion Solar Panel. Boost the power of your Hubi Retro 1 with an additional 10w solar panel. Particularly useful for the winter months when solar energy generation can be lower,...more