PVmet Weather Station
Solar Energy Efficiency Monitor

 
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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 specific to PV power generation and communication option that provide a powerful add-on to any solar power plant. These affordable stations are compact and simple to install.

The PVmet-150 is an entry level high-end utility grade station.The PVmet-150 uses a precise second class thermopile pyranometer allowing for bankable data and is mounted on a tilting bracket to provide global or plane-of-array measurements. The PVmet-150 is available with ISO 9060:1990 and WMO second class, first class and secondary standards pyranometers.

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

Features

  • Adjustable Solar Irradiance Sensor for Global or Plane-of-Array Monitoring
  • 1 or 2 x Back-of-PV Panel Temp Sensors(s)
  • Ambient Air Temperature Sensor
  • Modbus RS-485 Communication
  • Ethernet Modbus TCP Option Available
  • Sunspec Ver 1.1 Option Available
  • Additional Irradiance Sensor Option
  • Available with Prince

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-150 supports two sensors. The second may be purchased separately.

Communications

The PVmet-150 has a single, 2 wire, half duplex, RS-485 port. Termination can be enabled or disabled using a jmper located near the RS-485 screw terminals.

By default the PVmet-150 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

Installation

The PVmet-150's compact, light weight design makes installation quick and easy. Various mounting options are available, including the RainWise Mono Mount. The PVmet-150 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.

Customization

The firmware in the PVmet-150 can be updated through the RS-485 port using a simple PC application. The feature ensures that the PVmet-150 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-150 can also be customized to support customor specific sensors. This service is only available to volume OEM customers.