Intelligent Measurement Systems' flagship product is PVfit: a secure web service for fitting solar photovoltaic (PV) performance model parameters from current-voltage (I-V) measurements. PVfit is also available as an API (Application Programming Interface) for edge/remote/deployed systems.

PVfit's source code has been made public, and it has been updated to fit the SDM to IEC 61853-1 matrix measurements as well as limited specification datasheet info.

PVfit re-parameterizes common lumped-parameter single-diode model (SDM) for PV performance so that it seamlessly integrates with tried-and-true I-V curve measurement techniques. PVfit's novel approach to model calibration brings streamlined performance measurement and modeling workflows to practitioners Reduced complexity means less cognitive overhead. With equal or better accuracy, this translates into more credible predictions. PVfit also enables the replacement of conventional meteorological stations with potentially more accurate PV-based sensors for effective irradiance and cell temperature.

A presentation on PVfit's various capabilities was given at the 2022 PVPMC Workshop.