As the price of silicon panels has continued to come down, we’ve reached the point where they’re a small and shrinking cost of building a solar farm. That means that it might be worth spending more to ...

The concept of the “high-efficiency furnace” in popular consciousness dates back to the 1980s. That’s when the National Appliance Energy Conservation Act of 1987 required all new furnaces be 78 ...

Why not change the powertrain altogether? Make them diesel hybrids. This company home built a rig with a small diesel motor married to a electrical generator and a small battery bank (compared to a ...