In current PVT systems, coolant circulates with constant flow rate, thus causing terrific declines in power and heat harvesting capacity of the solar power and heat modules and in PV systems no coolant even exists. Cutting-edge VOLVAR Technology optimizes the fluid flow so as to optimize net total power and heat output. VOLVAR Clean-Tech maximizes the net total Solar Power and Heat output and carbon abatement. Customers optimally produce power, heat, cold with reduced investment and additional cost savings.