Just like a laptop panels and batteries are not lightweight or space savvy.
Dynamo hub or solar panel.
The two products i m comparing specifically are the shimano dynamo hub and the guide 10 goal 0 solar panel.
The solar panel folds down quite well still a little bulky but it easily fits in my frame bag or is left exposed when needed.
If you have dynamo lights already do yourself a favour and grab a power supply to start charging your devices.
My preference is to use dynamo hubs.
The solar panel has the advantage of being usable for other sports and with other bikes should i ever upgrade.
My biggest concerns are the rolling resistance on the hub and the availability of sun.
A 20w would recharge a 20000mah powerbank 2 3 times per sunny day.
I m trying to weigh the benefits of a solar panel over a dyno hub while racing the td.
You can choose different sizes for different power a 10 15w panel is more packable and will keep most users well charged.
I ll be powering 2 headlights a garmin edge 800 and an iphone.
However the dynamo hub seems more reliable for generation and doesn t rely on having a rack or flat surface on which to mount it.