Solar Panel Installation

On Monday last week we were able to complete the first major piece of work on our journey to becoming carbon negative: our photovoltaic system was installed.

Solar panels on the roof

We have 10 panels on our north-facing roof for a combined capacity of 2.75kW. The power company estimates that we will generate an average of between 5.62 – 11.82kWh electricity per day, as per the table below:

System Performance Estimate

Based on our electricity bills, our daily generation will either cover or surpass our daily usage. This means that we will be either carbon neutral or carbon negative for our electricity consumption throughout the year. The electricity that we don’t use will be exported to the grid, which will help the it to reduce its emissions by a tiny amount too.

The electrical inspector came by on Tuesday this week and turned on the system for us. We still need to sort out the changes to our electricity plan so that we are paid for what we export to the grid, but from the environmental perspective we are done. We got dressed up, we went out, and we celebrated.

If you’re playing along at home…

…have you installed solar panels? Please share in the comments below how much of your electricity usage you were able to generate yourself.

Our First Electricity Bill

We started working on reducing our carbon footprint in September this year, and we have now received our first electricity bill that has been generated entirely during this project. From when we moved into this house our usage had been consistently increasing, so we were all curious to see whether or not we had been able to change our behaviour and curb our consumption. The snapshot below is from that bill.

Our daily electricity use has dropped by 24.62% since last year.

We now pay an additional 5.10 c/kWh for 100% renewable energy, which only added $18.20 onto the bill. By managing to bring our consumption down so low, we were able to get our bill well under $200 for three months. At a time when Australians are suffering severe financial strain due to energy prices, this isn’t putting a significant financial burden on our family. The following table compares our summer usage to that of other households in the area.

Our electricity usage is significantly lower than comparable households.

As you can see, our four person household is using significantly less electricity than a one person household in our area. We’re really proud of ourselves for cutting back where we could and offsetting what we couldn’t reduce. At this point it would be easy to say that we’ve gone as far as we can and that now it’s time to sit back and relax, but that defeats the spirit of this challenge. We’re working on a lot of ideas that will reduce our household consumption even further – we still need to get through next winter in a house warmed by gas appliances – and I can’t wait to share with you next year some of the creative ideas that we’re testing.

If you’re playing along at home…

…please share in the comments below some of the emissions that you’ve been able to reduce this year. How far have you been able to come with your electricity bill? How far do you still have to go? What is your baseline for making 2019 better for the planet?

Switching to Green Electricity

One of the fastest and easiest ways that we can reduce our emissions is by being aware of the electricity that we use and where it comes from. As a nation, Australia is heavily reliant on fossil fuels for electricity, which provided 83.7% of our electricity in 2016 compared to renewable sources at 16.3%. We live in Victoria, which isn’t exactly dazzling in converting to renewable energy; in 2016 only 16% of the state’s energy came from renewable sources. The state government has committed to increasing renewables to 25% by 2020 and 40% by 2025 but, even if those targets are met, a lot of our electricity will still be coming from fossil fuels.

Even though the state grid has a limited amount of renewable energy being supplied to it, as a consumer we still have a degree of choice about how our power is produced. Electricity companies offer two types of electricity plans: green and default. The default plan that most homes sign up for allows the company to produce electricity from whatever source takes their fancy. The green plans require the company to produce a certain amount of your electricity from renewable sources. I’ve seen green plans range from 10% renewable all the way to 100% renewable.

Switching to a green energy plan can seem a bit superficial; the electricity that we actually use in our home is pooled, so just because we might pay for a green energy plan doesn’t mean that the specific electricity used in our home is green. The important thing here is the symbolism; companies like to follow dollars, and your dollars can speak louder than emails and phone calls will.

Finding a new electricity provider can involve a lot of research and ridiculous comparison websites. If you’re interested in shopping around, there’s a comparison page at the Green Electricity Guide that lists a lot of retailers I’ve never heard of before and a bit of information about their environmental credentials. It looks fancy and informative, but I’ve got a bit of a headache and I can’t be bothered, so I decided to just call our current company and switch with them. I signed up for a 100% green electricity plan, which took me 17 minutes on the phone, and I managed to negotiate a pay on time discount that fully offsets the slight increase in cost. Winning!

If you’re playing along at home…

If you aren’t already on a 100% green electricity plan, now is a great time to switch. With more and more companies realising the importance of offering green power to their customers, you might be able to save some money as well as the environment. Please share in the comments how much carbon you’ve been able to save and what sort of impact it had on your bill.