IRNAS Institute is a Slovenian non-profit organization involved into DIY science projects, education and open source technology development.
They participate in many events and they demonstrated how additive and subtractive machines can be used powered by photovoltaic panels.
Here is their Troublemaker 3D printer in off-grid configuration:
Here is their GoodEnough Hybrid CNC making Aker planters on solar power:
Link to more extensive article and some other cool project by IRNAS: