I love the idea, but the device is way too expensive (€650). After 01-2027 it will save you the tax (€0.12) and maybe prevent paying for negative prices.
I calculate a return after 3Mwh (€650/€0.20€/kWh) of energy.
The return energy logic can easily be build in homey.
So in fact hou only need a device that can module power and is connected to homey.
Any other cheap ideas?
