I found this the other day, while I was paddling with a green kayak. I would not say it is solarpunk, but I think it could lead us to the right direction

What is the Economy for the Common Good?

ECG is an economic model, which makes the Common Good, a good life for everyone on a healthy planet, its primary goal and purpose.

At the heart of this concept lies the idea that values-driven businesses are mindful of and committed to:

• Human Dignity
• Solidarity and Social Justice
• Environmental Sustainability
• Transparency and Co-Determination

Such businesses gain a competitive advantage in this new economy.

The good thing about this "new economy" is that it is compatible with capitalism in such that you can start with your current company, but make an extra Matrix, which can then be used by other companies.

It is already in use and not an inaccessible theoretical idea, which might never work.