PVmet Weather Station
Solar Energy Efficiency Monitor
PVmet 300

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The PVmet series of weather stations were designed to meet the needs of alternative energy power generation, specifically solar generation. These stations feature sensors and communication option that provide a powerful add-on to any solar power plant.

The PVmet-300 is the utility level station option.It features sensors specific to PV power generation. This low cost station is compact and simple to install.

As with all PVmet stations it includes a RS-485 Modbus interface.


  • Global Solar Irradiance Sensor
  • Optional Plane of Array Irradiance Sensor
  • 1 or 2 PV Back-of-PV Panel Temp Sensor(s)
  • Ambient Air Temperature Sensor
  • Wind Speed Sensor
  • Wind Direction Sensor
  • Relative Humidity Sensor
  • Barometric Pressure Sensor
  • RainGauge Sensor
  • Wireless Communication to Modbus Data Logger (up to 1 mile)
  • Modbus RS-485 Communication
  • Sunspec Ver. 1.1 Protocol Optional

Sensors & Options

Ambient Air Temperature
Housed in a passive solar shield.

Global Irradiance or Plane-of-Array Irradiance
The irradiance sensor is adjustable and can be set up to provide global irradiance (when horizontal)
or plane-of-array irradiance when installed to match the PV panel angle

Back-of-Module Temperature
These sensors are attached to the back of the PV panel using thermal conductive adhesive tape. They provide accurate panel temperatures, an important parameter for efficiency monitoring. One sensor is shipped with each system. The PVmet-200 supports two sensors.


The PVmet-200 has a single, 2 wire, half duplex, RS-485 port. Termination can be enabled or disabled using a jumper located near the RS-485 screw terminals.

By default the PVmet-200 is configured to operate as a Modbus slave at address 60. The Modbus register layout is compatible with SunSpec Ver 1.1. A simplified register set is located at address 200 for those that do not wish to use the SunSpec data format.

For users that wish to change setting, a configuration mode is provided. A simple terminal emulator application such as HyperTerminal is required to make changes


The PVmet-200's compact, light weight design makes installation quick and easy. Various mounting options are available, including the RainWise Mono Mount. The PVmet-200 is supplied with a detachable mast section that can be bolted to an existing structure

All electrical connections are made using screw terminals. Standard sensors are factory installed. As a user/installer the only connections required are power, communications and external BOM sensors. Connections are accessed by removing the front cover. The cover is secured with 4 screws.

For OEM customers the PVmet-200 an be supplied with factor installed power and communication cable. This completely eliminates the need for installer to remove the cover.


The firmware in the PVmet-200 can be updated through the RS-485 port using a simple PC application. The feature ensures that the PVmet-200 can be kept up to date with the latest available firmware. In addition, RainWise can provide certain OEM firmware customization. This includes register configuration, specific defaults and protocols.

The PVmet-200 can also be customized to support customor specific sensors. This service is only available to volume OEM customers.