What exactly do you want to perform? Charging a battery when there is light enough and living on that saved energy 365/24
Or just running your Pioneer kit when there is light (which will be difficult at the power-up time)?
Afaik there is a PSoC1 project with the technical background for charging batteries with solar panels. Just type "solar charger" (with quotes!!) into the keyword search field at top of this page,
Am not looking forward to charge the battery, just that it should work when the light is enough and fall back to power-on-board when its dark. Still looking for the feasibility of this idea.
Thanks for the reference Bob