At this point, I'm hoping that one day someone makes an ASIC-like machine that people could use to prove they are capturing solar energy, which would then automatically grant them SLR to the wallet of their choice.
In fact that has been worked on by several community members including myself, my contribution here
https://www.youtube.com/watch?v=AhpkXsFDTQE. However a non-deterministic input like energy readings needs a trusted oracle (incredibly hard to actually achieve).
Now consider a little product like the
https://www.zymbit.com/ that allows you to make a Raspberry Pi into a trusted platform with decentralized private/public key security, and effectively tamper proof in deployment.
Of course there is no guarantee the Foundation would grant SLR based on this tech, its a community project, but at least we try to make a real difference.