23 April

You can also use a home battery with no solar panels at all. For example, you could use it to store off-peak electricity overnight, to use in your house during the day. That alone can cut your electricity bill in half. WIth the Tesla batteries, you can do both, charge them with both solar and off-peak power, in the dark days of winter, if you need more electricity. It will do all the calculations for you in its brain, to determine the optimum time to charge and discharge, to give you the lowest electricty bill. This is why the software is as important as the hardware.