In these days we have installed six LSI LASTEM’s weather stations supplied to GreenPowerMonitor for a solar power plant of 223 MW capacity in Brazil. Each station is made by three poles with a complete set of meteorological sensors including five heated and ventilated Class A pyranometers, PV module temperatures and calibrated reference cells to determine the soiling losses. Each system produces nearly 80 parameters, the set nearly 500 parameters. Our Alpha-Log data logger send, every five seconds by Modbus-TCP protocol, the instant values of all the parameters (80 channels) to the local Scada system. Local data storing and data communication to remote server is also part of the features list.