17 August

Just one of a huge numbers of ways you can slice and dice your energy use, with the Tesla battery software. You can see the clear increase in use (blue) in the winter, with heating. And the clear decline in solar generation over the winter months (yellow). Even after a long, dark winter, we’ve still produced more energy than we’ve used, in 2024. That surplus will take off even further now in the Spring and summer. The surplus pays for any excess winter use, with money to spare (pure profit). Some get anxious about declining feed-in tariffs, the rate you sell it back to the grid. By far the biggest savings though are replacing grid electricty (at 25-40c/kWh) for your own use, with solar (0c/kWh).