Personal experiences of saving 42% on my electricity use

I have owned an energy monitor for 3 years and using the data downloaded to my PC, can provide good evidence for my significant energy savings:

• 2008 - Got my energy monitor (DIY Kyoto Wattson)
• 2009 - Changed behaviours (like turning off lights) saved 2 kWh per day
• 2010 - A new A++ Fridge saved a significant 1.4 kWh per day.
• The Panasonic fridge freezer has vacuum insulated panels rather than solid insulation.
• 2011 - Replaced most Halogen bulbs with LEDs saved another 1.3kWh per day.
• We are starting a "Halogen Busters" campaign through Transition Towns in North London.

This has resulted in total savings of 4.8 kWh/day which is 58% of the original amount and results in savings of £245 per year.

This histogram chart below shows the distribution of power use. By replacing appliances with more efficient ones, the peaks move to the left (less instant power) and reduce in height (less overall energy). The cumulative lines show the overall savings.

This histogram chart type is going to be incorporated into the OpenEnergyMonitor emoncms by Trystan Lea.

Weather station sending data to Pachube via Arduino

Using Practical Arduino's code to decode the data from a Technoline WS2350 weather station.
Then extended to send weather data and internal temperature (using one-wire DS18B20) to Pachube.
Note the Hope 434 MHz AM receivers are currently in short supply (try www.futurlec.com).

Multi-line charts using dHunter's Pachube Google Visualization API for Pachube app: