There’s something traditional, in an American sense, about a home and two cars in the garage. We are a nation that came of age the past 100 years concurrent with the era of the automobile. For better or worse our homes and cars are together entwined with the embodied energy of our built history. For better, we can power both our homes and our cars with harvested sunshine.
On May 15th 2014, we will begin a documented 12 month effort
to power our home and our two cars, each driven an average of 12,000 miles, by sunshine
harvested from the roof of our home.
We
will attempt to make more kwhs than we use over the entire year. We will attempt to be a true zero emission transportation solution, net zero in use and
below net zero in the total cost of energy.
We will document all with our utility bills and car readouts and share
our somewhat private information with you openly at the beginning of each
month. We’ve done the math, we’ve lived
this EV + PV life for 6 years, we’ve been below zero with our home and one car,
we believe we can do it with two.
Just as the cell phone, the digital camera memory chip and
the computer have transformed how we communicate the past 20 years, Innovation
and advances in technology have led us to an arrival at an important new
intersection with our energy and transportation future. An intersection where there is an emerging “symbiosis” of
the building, the automobile, and the energy plant all working together as a
self contained system owned by a single entity, rather than separate entities at
separate locations such as a home, a gas
station and a power-plant.
It is a time primed for great change in how we make and
distribute energy and how we motor from place to place. A time when new entrepreneurs will take up the
challenge and lead us into an exciting and imaginative energy and
transportation future.
Our goal is to save money, to be more self reliant, to lesson our dependency on foreign oil and its related cost in dollars and lives, and to
improve the air quality in our city. Our goal is also to
be a demonstration of this
rapidly emerging and symbiotic new energy and transportation future.
Our home
We live in Carlsbad California in a temperate climate. We were owner builders
of our home in 2006. Our home was
nominated and was awarded the 2008 California Center For Sustainability Energy
“Excellence Award” for being a net zero energy home. This award is peer
reviewed and goes to one homeowner per year in Southern California. The main home is 3250 sq. ft. There is a 1200 sq. ft. guest home occupied by
one. Our home and guest home use approximately 5000 kwhs a year of energy, less
than half of the average home electricity use in the U.S.
Our solar PV system
In early 2007 we purchased a SunPower 7.5 kw system installed by Stellar Solar that generates
approximately 11,500kwh a year. This
7.5 kw system was architecturally integrated into our home at the plan stage and
was sized to power the home and one car. This system was completely paid off in
utility savings and gasoline savings in April of 2012.
In April of 2014, we added an additional 1kw of panels for a
total system size of 8.5kw generating 13,000kwh a year. Our system is grid connected, we charge our
cars at night from the grid when it is less expensive and less taxing to the grid and we generate extra kwhs for
the grid during peak hours, providing this energy to our neighbors during peak demand.
Our cars
Julie and I will both
be drivers of the fully electric BMW i3. We expect to take delivery around May 1st. The BMW i3 is one of the most efficient cars and just might be the
most efficient car in the world. It is a dream to drive with leading edge technology, comfort and safety.
Julie
and I have been field trial drivers of both the BMW Mini-E and BMW ActiveE for
the past five years and both of these cars have fit perfectly into our lifestyles
requiring no concessions on our part. I
drive approximately 9000 miles a year and will use approximately 2000 kwh per year.
Julie drives approximately 15,000 miles a year and will use 3600 kwh per year.
Of special note, the BMW i3 at 2650 lbs is 1400 lbs or about 30% lighter than our current car the 4050 lbs BMW ActiveE. This lightness will save us over 1000 kwhs of energy each year for the same miles travelled.
The total usage of the cars and the home equal ~10600 kwhs per year. The remaining 2400 kwh (about $860 at the top
tier rate of 36 cents per kwh) will be used to offset our annual $250 natural
gas bill.
An asterisk here as even though the energy
is priced retail at 36cents per kwh and our excess generation is sold to our
neighbors by SDG&E at that price, they only credit our account 3.8 cents per kwh for
excess generation and you cannot carry over the credit to offset your natural
gas bill.
A therm of natural gas contains the energy equal to 29.3 kwh
of electricity. So our generation of
extra kwh will offset the therms of natural gas that we use.
We’re attempting this and are willing to document and share, success or failure, as we believe that this “Sunshine Symbiosis” will soon
become the standard with millions of “symbiotic homes, cars and solar
power-plants” accomplishing this same result in just a short decade
or so. Solar is getting cheaper with a
smaller footprint, houses are getting more efficient, and electric cars are
getting better, more efficient and less expensive. Put that all together and you have disruptive change and awesomeness :)
Lastly, we are saving about $7500 annually in fuel cost and
utility cost. Our power-plant installed
in 2007 is completely paid off with the savings of the past 5 years. We are living and driving at 20% the total cost of traditional
utilities and gasoline. We look forward to those savings for the rest of our
lives.
We are on a great path America, let’s put the pedal to the CFRP (carbon fiber
reinforced plastic) and motor towards a better future.
I'll update this effort with a new post around the first of every month.
Cheers & Sunshine,
Peder Norby
Editor’s Note, Peder is the Chairman of the San Diego County
Planning Commission. His
wife Julie is Director of Curriculum and Instruction at the Solana Beach School
District. They have been Felid Trial drivers for BMW for five years. Together since 2009, they have driven 95,000
EV miles powered from roof top solar.
