Measuring soil thermal resistance by in situ tests.

Measuring soil electrical resistivity by the voltamperometric method.

Measuring ground resistance and testing earth systems (CEI 11-1).

Land surveys by GPS technique.

Measuring the performance of the PV power plants.

Testing PV power plants (MD 19/02/2007) and acceptance test.

Determination of “hot spots” on PV modules by infrared thermography.

Test voltage on medium-voltage wires (CEI 11-17).