We have a new Leaf !

Leaf31We bought a generation 2 (40kWh battery) Leaf a few weeks ago. This has far surpassed my expectations – it is a very big step up from our earlier Leaf. Sad to see our lovely little blue car go after 5+ years but the replacement is better in almost every way. We are now able to do some much longer fossil fuel free trips. So many things to like but I think I most appreciate the way Nissan has incorporated regen driving into the new car.

I have written an article about our first weekend road trip in the new Leaf.  This was published on The Driven.

2018 Annual Report

This is my third Annual Report for our energy transition project. 2018 was a special year as it was the first full year where we had our Tesla Powerwall 2 in place – this made a big difference! We are now getting much closer to our Fossil Fuel Free goal: in 2018 90% of our electricity came from our solar PV system (60% direct; 30% via the battery (and 10% from the grid)). About 98% of our hot water energy use was from solar PV and about 90% of our EV energy use was from solar.

Petrol is the area where we now need to focus – unfortunately we’re not going to achieve any great reduction in our transport carbon footprint until we are able to buy a new generation EV.  Where are they?

You can download the 2018 Annual Report from here.

You can view an embedded version of the report below.

Amazing Low Power Heater

In the past two weeks I’ve acquired a brilliant personal heater. A heated hoodie. This is a beautifully made garment; lovely and soft and comfortable to wear indoors. Most importantly it only uses about 10W to give amazing warmth. It has three heating panels – one at the back and two in the front (see image). It far surpasses other heated clothing I have tested. I certainly find no need to have a heater on in a room when I’m wearing this. I bought it @ https://www.zarkie.com.au/product/evolve-heated-hoodie-grey/
heated hoodie

2017 Annual Report – Our Energy Transition

I have just released my Annual Report for 2017. In many ways 2017 was a year of consolidation – we made steady but not spectacular progress toward our fossil fuel free goal. The major step forward in 2017 was the installation of a Tesla Powerwall 2 in September. This is going to be a game changer! In the five months which we have had it in place only about 3% of our electricity has come from the grid. We will not achieve this for the whole of year 2018 but I think we may come close if we add more solar PV.

You can download the 2017 Annual Report from here.

Our Warm Low Energy Winter

I have just completed my report on our home heating experience over a somewhat cold 2017 Canberra winter.  This year for the first time we did not heat our home over winter.  We heated ourselves.  We kept nicely warm and made some very impressive energy savings.

You can view an embedded version of the report in the window below – you can also download the report from the bottom of  the window.

More Work on Far Infrared (FIR) Heating

Over the first three months of this year I’ve been been delving further into FIR heating.

I have produced a short document which describes what I have been doing.


This document covers two topics. First of all, I talk about a very simple ‘poster’ FIR heater which I have imported from Europe: it weighs about 400g and rolls up just like a poster – this is a very interesting device. For some time now I’ve been thinking about how to improve the temperature control of FIR heaters – in the second part of the document I describe my testing of two potential controllers.

2016 Annual Report on our energy transition

About a year ago I laid out our plans for becoming a fossil fuel free family in my book ‘Our Household Energy Transition: Becoming a Fossil Fuel Free Family.’

Its now one year on (Feb 2017): we’re going well and are still on track to being fossil fuel free within the next few years.

You can find my 2016 Annual Report here.

cover page


I’ve included some more details at the ‘Household’ tab.

Far Infrared Heating Panels: Beautiful Heat; Low Energy

Over the past five months of the Canberra winter we’ve been heating our house using Far Infrared (FIR) heating panels.

 I’ve prepared a report assessing the heating performance which you can access from here.

sway cover 2


In just a few words I believe FIR heating is brilliant – gorgeous thermal comfort and extremely energy efficient.

New Book: Our Household Energy Transition

I have just released my latest book:
Our Household Energy TransitionBecoming a Fossil Fuel Free Family.  You can download this from the ‘Downloads’ or ‘Household’ tabs on the yellow bar at the top of the page.  You can also view an embedded version of this book at the ‘Households’ tab.  This book describes our journey, so far, to fossil fuel freedom.

cover pictureI always intended this site to simply be a repository of books/reports that I produce from time to time.  Over the past four years the scope of my work has broadened: I started out in 2012 producing the first of my three books on the carbon footprint of aviation; I then moved on to electric vehicles; and now I have released my fifth book.  While all the books are on related topics, for ease of access I’m placing new material on separate pages.

The aviation carbon footprinting material is still the most commonly viewed information on this site and I am therefore giving this the easiest access – you can view some of this material from the ‘Recent Posts’ links to the right or by scrolling down the home page.  Alternatively you can use the ‘Aviation’ tab on the yellow bar at the top of all pages on the site.  The tab bar also gives access to the ‘Electric Vehicles’ and the ‘Household’ material.  All my publications are accessible from the ‘Downloads’ tab.

Carbon Footprint of Global Scheduled Domestic Passenger Flights 2012

I have just completed the third book in my aviation carbon footprinting trilogy.  My new book – Aviation Carbon Footprint: Global Scheduled Domestic Passenger Flights 2012 – focuses on the carbon footprint of global domestic aviation but it also captures key elements of the footprint of international aviation.  My previous book examined the carbon footprint of international aviation.  Together these two books provide a picture of the total carbon footprint of global scheduled passenger flights in 2012.

In order to facilitate comparisons between footprints my new book uses the same computational method and reporting style as the earlier books in the trilogy.  In a similar manner to the earlier books, this document is designed as a resource for researchers, industry analysts, policy developers & interested members of the public.

Carbon Footprint Profile Generators – tools which let the user generate carbon footprint information for all the countries, airports & airlines which were involved in scheduled passenger flights in 2012 – can be downloaded from the downloads page.

This is a free ebook and you can download a pdf version via the ‘Downloads’ tab at the top of the page.