Solar and Electric Hot Water System Selection Guide
When selecting a hot water system, whether solar or electric, there are a number of factors that need to be allowed for. How many baths/showers/hot water taps there are, does the dishwasher or washing machine use hot water, how many people are living in the house and their age and sex (teenagers shower longer than others, and females shower longer than males), do you need to allow for regular or frequent visitors, how cold the area you live gets among other things.
As a guide, an average shower head uses between 12 and 15 litres of hot water a minute and an average person showers for between 10 and 15 minutes, longer during winter.
You can use the following table as an approximate guide for electric systems. For consideration of your specific needs, fill out the form below, and it will send an email to sales@maxfoxelectrical.com.au and one of our sales team will get back to you.
SE=Single Element
TE= Twin Element
| Situation | Brand | Electric System Tank Size (Litres) |
| One person with one bathroom | Saxon
Rheem Vulcan |
80 SE / 125 SE |
| Two people with one bathroom | Saxon | 125 SE / 160 SE / 160 TE |
| Rheem
Vulcan |
125 SE or 160 SE | |
| Three people with one or two bathrooms | Saxon | 160 Twin Element / 250 SE |
| Rheem
Vulcan |
250 SE / 315 SE | |
| Four people with one or two bathrooms | Saxon
Rheem Vulcan |
250 SE / 315 SE / 250 TE |
| Five people with one or more bathrooms | Saxon
Rheem Vulcan |
315 SE / 315 TE / 400 SE / 400 TE |


