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Wattmon - Intelligent Remote Monitoring and Control

Wattmon helps you log data, monitor and control your devices over the Internet


Access your data over the Internet using any browser or smart phone


Log data and control your devices with automated rules - no programming required!


View intuitive graphs to understand and troubleshoot your system easily

Where can Wattmon be used?

Keeps track of remaining capacity and battery health with options to automatically control charging.
Interface with Inverters and Power meters to log AC energy - monitor your grid tie solar inverter production remotely.
Control devices around your home or company automatically. Meet the Internet of Things!
Remotely monitor your AC & DC solar pumps including water flow rate and power
Monitor solar energy production and DC energy generated
Monitor wind speed or energy generation from your turbine
Measure temperature, pressure, humidity, irradiation, wind speed, rainfall and more
Monitor telecom tower batteries and automate charging

Features & Benefits

Highly Versatile
Lets you customise device to your exact needs with intuitive interfaces
Easy To Use
Allows non-programmers to configure and automate things
Accessible from your phone, tablet and pc through our proxy server from anywhere
Industry Compliant
Integrate new and existing devices easily using Modbus RTU & TCP
Local Storage
Securely store your data locally, control who can see it
Cloud Ready
Upload data to your own server or use our advanced cloud portal
Write your own scripts in a built-in editor using uPHP to extend functionality

How Can Wattmon Help You?

Versatile Solutions

Monitoring Hardware
Devices that let you get to your data remotely with minimal hassle
Cloud Portal
Find out how our cloud based portal can help you
Understand the Wattmon system quickly

The Solar Radiation Sensor, or solar pyranometer, measures global radiation, the sum
at the point of measurement of both the direct and diffuse components of solar
irradiance. The sensor’s transducer, which converts incident radiation to electrical
current, is a silicon photodiode with wide spectral response. From the sensor’s output
voltage, the console calculates and displays solar irradiance. It also integrates the
irradiance values and displays total incident energy over a set period of time.
The outer shell shields the sensor body from thermal radiation and provides an airflow
path for convection cooling of the body, minimizing heating of the sensor interior. It
includes a cutoff ring for cosine response, a level indicator, and fins to aid in aligning the
sensor with the sun’s rays. The space between the shield and the body also provides a
runoff path for water, greatly reducing the possibility of rain- or irrigation-water
entrapment. The diffuser is welded to the body for a weather-tight seal; it provides an
excellent cosine response. The transducer is an hermetically-sealed silicon photodiode
with integrated amplifier . Spring-loaded mounting screws, in conjunction with the level
indicator, enable rapid and accurate leveling of the sensor. Each sensor is calibrated
against a secondary standard Pyranometer in natural daylight.

Operating Temperature : -40° to +65° C
Storage Temperature : -45° to +70°C
Transducer : Silicon photodiode
Spectral Response : 400 to 1100 nanometers
Cosine Response
Percent of Reading : ±3% (0° to ±70° ), ±10% (±70° to ±85° )
Percent of Full Scale : ±2% (0° to ±90°)
Temperature Coefficient : + 0.12% per °C
Reference temperature : 25°C
Housing Material : UV-resistant PVC plastic
Weight : 250 g
Range : 0 to 1800 W/m2
Accuracy : ±5% of full scale
Drift : up to ±2% per year
Output : 0 to 3 VDC (0- 1800 w/m2)
Power supply : 5 VDC


This device can be interfaced directly with the WattmonPRO or with the A5S1

Contact us for pricing details.

Connection Diagram


REI 2018

It's that time of year again!  We look forward to interaction with all of you this year at REI 2018 in Greater Noida (if you aren't already planning it - it's between September 18 and 20, 2018).   We have had a great year and expanded our support for inverters and power meters, perfected power control for both zero export and diesel generator protection, and most importantly we are going to be launching a new product as is our tradition every year!

So make sure to visit us at Hall 1 Booth 6 - right at the entrance on the right side!

Update March 2018

We would like to share some interesting projects we have been working on over the past few months.  Our blog has been rather dormant as we have been extremely busy with new and existing clients - and we will try to do better, promise!

Off grid street light and pumping system

This project is interesting because it integrates several components together to form a complete monitoring and control system.  A lithium battery bank of 48v is connected to a Victron inverter and solar charge controller.  A Sundrax street light controller is connected to a string of 10 street lights over powerline communication, and bridged to Wattmon via Modbus RTU.  The Victron is connected to Wattmon via RS232 for monitoring and via a digital output to force charge from the grid if and when necessary.  A vortex filtration pump is also controlled via Wattmon at specific times of the day when energy is available. An AC power meter is also connected over Modbus RTU providing a comprehensive overview of the entire system.  What makes this project unique is that it seamlessly bridges components that would not normally work together and provides a smart platform that helps optimise the use of renewable energy while at the same time ensuring the overall health of the batteries.  We have also integrated it with a university project focussed on weather prediction, and it regularly updates its run schedules based on data from their engine.

Remote Power Monitoring

We have worked together with a multinational power company to provide a remote view of a 250MW power plant using Wattmon.  One wattmon device at the power plant collects active power values from a meter and pushes it every 15 seconds to a second wattmon installed at the main headquarters.  This data is then shown on a large 4 digit display in the control room allowing for immediate responses to anomalies.  We achieved this using MQTT and both devices are connected via 3G dongles making this type of solution truly portable.

Power control with Multiple Diesel Generators

A one megawatt power plant installed at a factory provides fuel saving when one or more diesel generators are running.  The challenge with a diesel generator is to ensure that a certain load is always present to prevent tripping the system, especially when this is used in a factory where certain processes require uninterrupted power.  The additional challenge in this project is that we had to monitor 4 diesel generators and set the solar production levels to match the acceptable limits.  Each genset had a different power rating.  We also implemented dynamic power factor correction at the inverter to increase the overall efficiency.