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SCK2.1: Solar power

I’m looking for more informations about the battery and a solar panel. All the documentation available seems to be outdated.

  • what are the specs for a solar panel?
  • how to connect the solar panel?

thanks for your help!
Best Regards from switzerland!

Looking for the same

I am looking at the following but no ideas if it is suitable.

I am currently using a similar solar usb charger on my setup.

It does work in that the battery charges quite quickly in bright conditions but when it is not charging the unit seems to drain power. I would say on average the battery lasts about 50% less with this attached. In the middle of summer this was fine but even now barely past the equinox I get more and more device off line warnings as the battery runs out.

Admittedly the panel is facing due east and is mounted to a window so the angle is not ideal but even so I would not expect a solar charger to draw power when not charging.

Here’s a picture of my current setup:


Thank you for showing your setup and pointing to the draining issue.

I’m now thinking about a solar panel together with a small charge controller like this one: (sorry german only). This would also allow the connection of a big lead battery to ensure operation of the kit in winter times.

My colleague @victor is currently running different experiments to find the best solar power setup, including tuning the firmware

We hope we can release our recommendations as part of the documentation soon!


@pral2a, please do, I am looking forward to that :slight_smile: .

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Yes, we are working on that and I hope in a couple of weeks we will have some documentation and a firmware version with some tweaks specifically for solar panel setup (like the drain issue that you mention).
I’ll keep you posted!



Hi everyone,

We keep working on the tests!

We’ll publish some conclusions soon!

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Any news on this? I could not find anything for SCK 2.1 but need to do a demo with solar powered kits