In TECNALIA, during MEZeroE project, we have developed new tests to obtain information on the power, efficiency and constructive viability of BIST and BIPV-T development phase systems in an operational environment, subject to real generation and demand conditions. The performance of the system can be compared against standard PV and ST products tested simultaneously with the test sample during a period of time. Once these first results have been obtained, we can carry out the outdoor tests of the façade and roof standard (wind, impact and watertightness) on the test sample and repeat the test to find out the impact of the outdoor tests on the thermal-electrical performance of the system under development. In addition, with this test we offer the evaluation of the capacity of the system for integration into the building from a constructive aspect as an envelope system and connection to the building's installations.