7 guides
The battery chemistries in home solar systems and electric cars, what each is good and bad at, how long they really last, and why the next big thing isn't a reason to wait.
Kilowatts are the rate, kilowatt-hours are the amount. The one idea behind every solar quote, battery spec, EV charger and power bill, with video.
The one-line sum for charging time, how fast a wall socket and a 7 kW charger really are, what limits the speed, and charging from your own solar.
How to work out a home battery's payback from your own bill: usable kWh, what each stored kWh saves, rebates in 2026, and when a battery makes sense.
Supply charges, usage rates, time-of-use, demand charges and feed-in tariffs, line by line, with a worked example so you can check your own bill.
A four-step sum using your power bill, your local sun and when you use power. Worked examples for 20 kWh a day, 1,000 kWh a month and adding an EV.
About 24–29 kWh a day on average in Australia's capital cities, far less in winter. The numbers by city, by season and per hour, and how to check yours.