Bulgaria Guide: Heating & Air-conditioning, Heathing systems and costs: As a mountainous country Bulgaria has

The eastern European country saw the addition of only a few hundreds kilowatts of PV over the past few years, and for 2017 just around 200 kW of new PV systems are expected to come online. Source: Bulgarian solar market still halted by unfavorable regulatory framework – pv magazine International

Source: Heat Pumps | AirTech

You would think that the more sunlight that hits a solar panel, the better. When it comes to efficiency though, that’s not the case – as photovoltaic cells heat up their efficiency decreases. To capture that heat and put it to good use, a team of scientists from Brunel University London has created a hybrid…

Estimating the Cost and Energy Efficiency of a Solar Water Heater Source: Estimating the Cost and Energy Efficiency of a Solar Water Heater | Department of Energy