Electricity grows cleaner

Dear Pat: We’re considering buying an electric vehicle and switching from a propane furnace to a heat pump. We care about the environment and are wondering if using more electricity would be beneficial.  –  Jason and Chelsea

Dear Jason and Chelsea: The decisions about how to heat your home and how to fuel your transportation needs are among the most important environmental decisions you can make.  There are many changes happening in the energy sector, and with electric co-ops in particular, that are making electricity cleaner.

Decades ago, coal was the preferred fuel for electricity generation. As investments in environmental upgrades took hold, the energy industry increased the use of low sulfur coal and found ways to clean the coal and burn it more efficiently. Scrubbers were installed in coal plants to reduce sulfur emissions, but even after these improvements were made, natural gas turbines were still considered environmentally preferable to coal plants. In 1990, utilities depended on coal to generate more than half of their electricity, but by 2016, that dropped to less than one third.

In recent years, solar and wind generation have taken off and now provide more than 8 percent of utility energy generation. Electric co-ops have installed solar at a record pace with solar capacity growing more than four times since 2015. Electric co-ops have pioneered community solar programs, where members subscribe to a community project and the co-op installs a large array that is much less costly per kilowatt than smaller rooftop projects. Nearly 200 co-ops offered community solar programs in 2017, and more than 500 co-ops across the country use electricity generated by wind power.

These statistics are national, but the environmental impacts of electricity depend upon where you live and where your electric co-op purchases electricity. Many co-ops publish this information on their website or in their annual reports on the sources of electric generation. Some include information on carbon emissions.

With all that in the back of your mind, let’s get to the decisions you are looking to make: home heating and vehicle purchase.

The heat pump you’re considering is a good option. Heat pumps are about 1.5 times more efficient than they were in the 1970s, and they’re functioning better in colder temperatures. Heat pumps take care of your cooling needs as well, and can do so with about half the energy they required in 1990. The best choice for home heating and cooling depends on climate. In more extreme climates, you’ll need more heating or cooling capacity and can justify splurging for more energy efficient models.

As our energy supply becomes cleaner, electric vehicles are becoming a better
environmental choice across the country. The environmental advantage depends on how electricity is generated in different locations, and there are other factors to consider when looking at an electric vehicle. The fuel cost of an electric vehicle is, on average, half as much per mile as a gasoline vehicle. Electric vehicles generally require less maintenance, but the batteries eventually need replaced. Battery costs are dropping, but potential buyers should note this will still be a hefty bill. Electric vehicles cost more upfront than their gas counterparts, but the cost is coming down with every new model.

As you make your decision on a heating system and new vehicle, remember there are other things you can do to reduce the environmental impact of your energy use. Insulate and seal the air leaks in your home. Set the thermostat a little lower in the winter and a little higher in the summer. Also, check with your local electric co-op to see if they offer a community solar program or additional energy-saving tips.

I hope these ideas help you make your decision.

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