Homecamp is a loose collaboration between various hackers, businesses and organisations looking to accelerate the rate of deployment of energy efficiency aids for the consumer.
There is a very good forum, with a good deal of Arduino based hacking going on. The Google Powermeter API is now available to all, with companies like Current Cost providing bridges to it from their energy monitor devices. Also check out Pachube. And there are a lot of energy monitor devices hitting the market, see:
- www.currentcost.com
- www.diykyoto.com
- www.eco-eye.com
- www.efergy.com
- www.ewgeco.com
- www.greenenergyoptions.co.uk
- www.onzo.co.uk
- www.theowl.com
To name a few.
Supporting companies include Tinker in London, and Arduino (order from BitsBox or Nuelectronics or many others).
And here is an interesting open source energy monitoring project based on Arduino.
Navitron has links to FIT payback and other solar related calculators, plus lots of supplies.