User Manual

PowerOptimal Elon® 100 User Manual

Version date: 2022/06/28

Page 10 of 24

Version number: 2.15

property and/or information contained herein remain vested in PowerOptimal, except if otherwise agreed in

writing.

Please note: The water in your geyser should be heated to 60 °C at least once a week to

prevent Legionella bacterial growth

. If you have heavily overcast weather for more than

a week on the SOLAR ONLY setting, turn the dial clockwise outside of the SOLAR ONLY

zone for a day in order to supplement the solar water heating with grid electricity to reach

the thermostat temperature setting.

When is the best time to shower?

If the control dial is set to “SOLAR ONLY”, it is best for people in the household to shower either in

the morning or in the evening, but not both. (If you shower in the evening, cold water will mix with

the remaining warm water overnight, and you will have cold water the next morning. If you do not

shower again in the morning, the water will be heated during the day.)

If the control dial is set to any setting outside “SOLAR ONLY” or "MAINS ONLY", it is best to shower

in the morning for maximum savings.

General hot water energy saving tips

• Shower, don’t bath

• Install water-saving / low flow shower heads (these also save energy because of reduced

hot water use!)

• Reduce shower duration

• Check that your geyser is well insulated

South Africa is a water-scarce country – reducing hot water use saves both energy and water!

See for example:

http://www.eskom.co.za/sites/idm/Documents/Legionaires_Fact_sheet_hot_water

_bacteria_simple_facts.pdf and http://standards.nsf.org/apps/group_public/download.php/

30413/How%20to%20Avoid%20LD%20at%20Home.pdf