This is the general rule of thumb we follow for recommending our systems:

But it is not a one-size-fits-all approach, there could be other factors in your lifestyle or location that will impact what you need. We recommend watching this video/article to get a better understanding.
Case study
Here we have an example of one of our customers. They have a 3-bedroom home with a family of 2 adults and 2 children.This is an estimation of their daily power consumption:


Based on this family's required energy needs the calculator has matched them with our Bach Kit, The Tui Solar Nest or The Freedom Pro. All of these packages will generate enough daily power to keep this family going, as well as allow for a decent amount of head room for safety even in the winter months.
| Required Energy | The Bach | The Tui Solar Nest | The Freedom Pro | |
| Daily Average Generation | 5175 Wh | Summer: 14kWh Winter: 8.8kWh |
Summer: 21kWh Winter: 13.2kWh |
Summer: 14kWh Winter: 8.8kWh |
This family chose to go with the Tui Solar Nest, they are very happy with it's convenience and are finding they have more than enough power.

Your results may vary if you are more on the conservative side of your power consumption or if you are rather power hungry. We recommend filling out the Solar Calculator to see what your total average daily generator number will be.
If you’re in a similar situation as the example above, we recommend:
- The Bach Kit – for a more power conservative approach.
- The Retreat Pro – for higher power, without constant monitoring.
Things to consider:
- Swap your cooking and water heating to alternatives like gas or wood fire.
- Have a back-up generator.
If you're interested in learning the maths behind these calculations or a more detailed explanation of how to size your solar package to your specific situation have a read of this article.
