I took my final reading tonight. It worked out that my daily average for week 4 was 16.8 kWh, which was similar to my baseline reading. Now that the weather is heating up, the airconditioning is being used sparingly, but still it uses so much of our daily consumption. I estimate that on hot days, our demand goes up by at least 40%. You can tell just by a quick glance at the graph below which 4 days were the ones over 30 degrees C! They stick out like a sore thumb.
Here are a few statistics from my end of the challenge.
Highest electricity generated by Solar PV in one day: 19 kWh (5th December)
Highest electricity drawn from the grid in one day: 17.6 kWh (18th December)
Most exported to the grid in one day: 13.6 kWh (5th December)
Lowest electricity generated by Solar PV in one day: 2 kWh (26th November)
Lowest electricity drawn from the grid in one day: 6.4 kWh (6th December)
Least exported to the grid in one day: 0 kWh (26th November)
Highest daily total consumption in the home: 28.4 kWh (9th December)
Lowest daily total consumption in the home: 11.1 kWh (6th December)
Biggest cost in one day: $2.31
Biggest profit in one day: $7.46
Total profit: $64.16 for the month!
Our electricity consumption was variable, however we had more days under 15 kWh than we had above it, which is quite pleasing.
So what have I personally learnt. My first point of action will be to replace a very old air-conditioner in the living area, which is the box type that fits into a hole in the wall. I estimate that it uses about 3000 watts per hour, and has the biggest impact on our daily consumption. Over the next few months I will be saving up for a replacement. The old one is about 15 years old and on its last legs, so I will not feel guilty replacing it. Once it is replaced with a more energy efficient one, we should be able to keep our consumption below 15 kWh, even on a hot day!
As we come to the end of the challenge, I would just like to thank everyone for participating. I hope that everyone gained a bit more insight into their electricity usage, and what events and appliances are the culprits for high energy utilisation.
From the initial response that I had via comment and on my Facebook page for the blog, there were about 30 to 40 people who gave the challenge a go. I don’t know how many made it to the end, but if you did, well done and please leave a comment with either your week 4 confession, or just a friendly note. I would really appreciate it as well as any feedback you may have.