Can I power a heat pump from a renewable energy source like a windmill, hydro or solar panels?
A. Yes you can. A hydro-powered heat pump is probably the most viable renewable power-source since it is fairly constant. Solar or wind inputs would be difficult, especially on a small scale. The outputs are variable and dependent on the weather, so there can be problems matching the input power requirements. The very large number of photo-electric cells required to power a heat pump would probably make this option impractical.