From the sun!
This may seem strange, but we had 16 photovoltaic panels attached to our roof since January, but they were not connected to our electrical system so they just sat there generating electricity for no good reason. It is assumed that the pandemic caused a shortage in competent workmen to finish the job and there was real fears that the installing company did not follow the city rules. Of course, when the permit was up for renewal, the company sent a crack team to fix what needed to be fixed and now we are currently getting current from the sun. (We don’t know exactly how much energy was a getting because the idiots forgot to attach the WiFi antenna to the WiFi card.