GPX web system pilot

Prototype 2

Demo website

The GPX Prototype.

The prototype website showing the energy account of the prototype is shown below as screendump. It has has been permanently active since 2 April 2007 from off 09:23 hours, but is now closed after succesfull performance of the principles of operation. The account website shows numerical and graphical consumption, production, totals and balance. When the balance reaches the setpoint (standard on zero), an automatic switch (relay) will turn off the load on the consumption-unit.

Visit the Live Website (now closed), or have an impression of what you will see with a "picture" (screendump) of the production site here below.

Visit the live-website (now closed) and use demogpx in both fields (not functional at present)

For both username and password use: demogpx .
The live website shows the graph of consumption and production of today, and the balance (Resultaat).

To view details of production or consumption on any other moment click on the symbol on the right side next to the graph.
Below the graphs the total production, total consumption and the balance ("resultaat") is shown. The balance is the "stock" of green that is possible to use later.

In case balance reaches zero (standard setpoint), the consumption unit will switch off.

Picture of the present location of the solar energy GPX production.
The connected metering units are presently in Utrecht,
with the production unit at the Scorelstraat in Utrecht, since Saturday 14 July 2007.
  The Meter Starting Positions on demowebsite are:
  production: 153206 Watt hour, consumption: 10032,5 Watt hour, balance 143173 Watt hour
  The setpoint for "switch off" (switching of the consumption) was set to 143173 Watt hours (143,2 kWh).

GPX demonstrates below an example of the connection of the production with consumption. The meter data is presented on a web-page, shown as screen-dump below from the day of 12 April 2007. Since the start on 2 April, a total energy consumption of 690 Wh was registered, mainly for the telecom-module. In the same 10 days, a total energy production of 19734 Wh was made as green energy. The resulting "stock" of available green energy is 19053 Watthours. Until 14 July 143173 Watt hours - solar energy - were produced at the roof of the school.

The energy source has been - since 2 April 2007 - a set of 3 solar panels on the primary school - Jan Ligthartschool, Arnhem.

The first amount of energy (38Wh) was consumed with the GPX system on 10 April for charging a battery for a mobile drill as equipment needed for a new extension of the bird-house for the Great Tit (Parus Major).

The balance is positive: 19053 Wh. (Now functioning as a strategic green reservoir). The automatic switch does not consume energy in steady state. Only the sole switch action will use some energy (order of magnitude: 1 Watthours). The consumption for telecom-use is relatively high due to the pilot situation. The system in the GPX module is continuesly busy with sampling the pulse signal from the pulse-output from the kWh-meter. This takes a power consumption of 2,7 Watt. Future development will lower this "self-consumption".

With this action, the world's first GPX system is set to use in this testing phase. We congratulate all partners involved.

Picture: screendump 12 April 2007 at 16.48 hours, showing GPX connection details (consumption/production and balance). Supported by AVIC.
To visit the live-website, type in both fields (username and password): demogpx