Solar panels on window sills and balconies can supply more power than you would think.
Directly coupling DC power sources with DC loads can result in a significantly cheaper and more sustainable solar system.
Hydraulic power transmission is very efficient compared to electricity when it is used to operate powerful but infrequently used machines.
Energy storage is often ignored when scientists investigate the sustainability of PV systems.
The hydro power installations in use today are less energy efficient than those of earlier centuries.
About a quarter of the existent wind turbines would suffice to power as many electric velomobiles as there are people.
The present approach to pedal power results in highly inefficient machines.
Boat mills, bridge mills and hanging mills were almost as widespread as windmills.
We don’t need better batteries, we need better cars.
Would it make sense to revive the industrial windmill and again convert kinetic energy directly into mechanical energy?