Patent ID: 8829930

Claim:
A method of testing electrical impedance of a multiplicity of regions of a photovoltaic surface comprising the steps of: a. providing a multi-tipped impedance sensor comprising a tip of only a multiplicity of spaced apart impedance probes separated by an insulating material extending from a first end to a second end of the each impedance probe, each impedance probe of the multiplicity of spaced apart impedance probes directly adjacent at least three other impedance probes, and each impedance probe having the first end adapted for contact with a photovoltaic surface and the second end in operable communication with an impedance measuring device; b. contacting the multi-tipped impedance sensor with a surface of a dielectric layer of a photovoltaic surface, the surface being on a side of the dielectric layer that is opposite a side comprising an electrode for the impedance sensor; and c. measuring electrical impedance of the dielectric layer between individual first ends of the probes.