Solar is becoming more green thanks to development of several biobased materials.
In this instance, solar panel manufacturer Solar Panels Plus developed SPP corn glycol for use as a heat transfer fluid in solar thermal system. The company said the corn glycol is an alternative to traditional petroleum-based propylene glycol.
The corn glycol is completely biodegradable, 100% from renewable source (from corn oil if I’m not mistaken), and is said to be even safe for human consumption, although it is not suggested by the company as you might be disappointed by its taste.
You can check out the company’s website to know more about this formula.