We delve into energy conversion efficiencies of solar photovoltaics, fuel cells, the Hydrogen Economy, steam and hydro-turbines and ways you can conserve energy in your home.With Vic Hudson and John Chidgey.Previous Pragmatic Episode Links: Episode 2: The Battery Problem Episode 2a: The Battery Problem Follow-up Part A Episode 2b: The Battery Problem Follow-up Part B Episode 2c: The Battery Problem Follow-up Part C Episode 2d: The Battery Problem Follow-up Part D Solar System Design Presentation Embedded Episode Links: Episode 2: The efficiency of coal vs combustion engine Episode 2: Gas heating efficiency Episode 2: Photovoltaics Episode 2: Aurora PV inverter Generator Efficiency Links: Max Efficiency of Internal Combustion Engine - Physics Stack Exchange Diesel Engines Efficiency Energy Conversion Efficiency Shockley-Queisser Hydroelectric Power Generation PV Cell Efficiencies Electric Generator Fuel Cell Basics Fuel Cell Efficiency Fuel Cells and Hydrogen Fluid Mechanics Equations Home Energy Efficiency Links: Glazing Your Home Tubular Skylights Insulate A Floor Building Insulation Where To Insulate Your Home Building Material U-Values Best Insulation Material Conservation of Energy