My Energy Obsession

Reader Contribution by Cam Mather
Published on February 9, 2011
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 I’m sure you’ve noticed by now that I’m a little bit obsessed with my
energy usage. I thought I’d share a typical Sunday at Sunflower Farm
Off-Grid Retreat with you, to give you some idea of just how obsessed I
am. Well, a typical day in my mind anyway. Believe me, Michelle looks at
the world radically differently than I do.

We had friends over for breakfast. I boiled water and cooked potatoes
(for the home fries) on the woodstove. When the potatoes were cooked
enough I put them into a huge cast iron frying pan with onions, again on
the woodstove. I also had a few kettles of boiling water on the
woodstove to be used for our tea and coffee. I cooked the rest of the
meal on our induction electric stovetop. It was a sunny morning and the
batteries were already fully charged so I had power to burn. I toasted
our bread in the electric toaster.

Of course the energy used to cook our food is only part of the
picture. Lots of energy is used to ship food from where it’s grown to
where it’s consumed. That morning our potatoes and onions had come from
our garden. The cream in our coffee and the eggs were local. The bread
was from a local bakery – if I’d grown and processed more wheat this
past year, it might have also come from our garden! The worse energy
offender on our menu was the coffee, which was not grown within 100
miles of our place. As meals go, it was pretty low on the carbon scale.

Later that day Michelle was working on accounting, and trying to
listen to the radio. She kept losing the station though, so I turned on
the TV/satellite dish which offers about 100 music channels including
hits from the 1970s, the 1980’s, blues, jazz, dance, you name it. It was
a mid-winter day and I was able to leave the TV on all day! How great
is that? Once my batteries are charged I’ve got to use the excess juice
some way or another!

Solar panels work best in the cold. It was -22 ° C (- 7°F) that day.
The panels also work best with the type of clean air we have this time
of year. During the summer, we often experience a “haze” of pollution
wafting in from Toronto and the Ohio valley. It’s surprising how much
particulate in the air can restrict the output of my PV panels in the
summer. This time of year we have lots of snow on the ground, which
reflects even more light at the panels. All of these conditions were
working to our advantage and when I checked my Outback Charge
Controller, it indicated that there was 2320 watts coming in from my
panels. This is close to the rated capacity of all the solar panels on
my two trackers, so was pretty exciting to see how well they were
working.

On a day like this I have way more power than I can use or store in
my batteries, so I divert the excess electricity in to a hot water tank.
Actually, the electric tank is my second hot water tank. Our Enerworks
Solar Domestic Hot Water Heater (SDHW) heats the first tank. Even though
it was -22°C that day, the Enerworks panel was heating water. If my
home was hooked up to the electrical grid I’d be able to send my excess
power to the grid, but the grid is 4 miles away and I won’t be hooked up
any time soon. Our third hot water tank is powered by propane, but with
all the hot water coming into it from tanks heated by the sun and our
excess electricity, it won’t be coming on for a while.

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