Solar PV–Heat Pump Systems

Photovoltaic-thermal heat-pump systems couple solar panels to a heat pump that removes heat from the panels and can recover it for uses such as hot-water production.

This integration links electrical output, panel temperature, and useful heat in one system. Engineering choices include surface coatings and refrigerants, whose performance can vary by season; a test in Kirkuk, Iraq, for example, compared refrigerants and a titanium dioxide–linseed oil coating. Understanding these systems means weighing combined electrical and thermal efficiency alongside operating conditions and the limits of experimental testing.