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Last month we set a new household record.  

Blame the baby, the extra washing, the old house, the cold weather, the dehumidifier, and whatever else. But despite booking in hours of free electricity across the month, between the gas heating and electricity, our family energy bill for June 2025 was the highest it’s ever been: $540.   

I know we’re very comfortable relative to so many families, but even so, that has gotta change. But while of course there are things we as a family can improve upon, I’m very aware that there are only so many gains to be won from policing light switches and shower times. I’m seriously wondering about solar.  

I read an amazing set of stats in the New Yorker magazine this week about the scale and development of solar energy around the world. This is all big picture stuff... mainly the huge industrial solar farms, rather than household solar, but a couple of these numbers absolutely blew me away.  

First of all, solar power is now growing faster than any power source in history. Globally, a gigawatt’s worth of solar panels is being installed every fifteen hours on average, which means if you set a stopwatch running right now, new solar panels equal to the entire electricity generation capacity of New Zealand will be installed and running by midnight on Thursday night. Next week? The same. And the week after that. And the week after that.   

Another fact. It took 68 years from the invention of solar panels for the world to install the first terawatt of solar generation. That was 2022. It took just two years to install the second terawatt of generation. And it’s gonna take a year to 18 months to install the third.   

By next year, the International Energy Agency says solar energy will generate more electricity than all the world’s nuclear power plants combined. By 2029, more than hydro dams. By 2031 more than gas and by 2032, more than coal. Globally, we are generating a third more energy through wind and solar than this time last year.   

The Chinese are miles ahead of anyone else on this, but even gas-guzzling America is changing fast.   

Why? Are we doing it because it’s the right thing? The moral thing? The climate-conscious thing?  

No. The huge surge in solar is being driven by economics. Put simply, solar power is way, way, way cheaper than other forms of electricity generation. Between batteries and solar panels, the technology is only getting better and only getting cheaper. Ten years from now, as reported in that article, the International Energy Agency says solar power will become the world’s main source of all energy... not just electricity, but all energy.  

I’m not naïve about solar’s limitations. Few of us need reminding —especially given the last couple of weeks— that there are times when the sun doesn’t shine. And right now, in the depths of winter, when our family’s energy bill is the highest, is the time of year when solar panels on our rooftop would likely be generating the least electricity.  

But if I take a step back and think about solar in the context of the whole year, it makes increasing economic sense to me. In summer I reckon I could wipe off a massive chunk from our energy bill. And whatever savings I make then can contribute to offsetting the bills in the middle of winter.  

All I knew when I looked at my energy bill this week is the status quo isn’t gonna be sustainable for our family. Rather than debating if we’ll go to solar, the only question for us now, is when.