Instruction Manual

PowerOptimal Elon® 100 Installation Manual

Version date: 2022/05/23

Page 13 of 37

Version number: 2.20

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

writing.

a. Confirm solar PV array supply voltage and DC power to geyser when thermostat is closed.

The Elon® 100 will switch DC power to the geyser approximately 10 to 15 seconds after DC

power to the Elon® has been switched on (if there is enough sunlight). (If thermostat is not

closed, open hot water tap in house until thermostat closes.)

b. Test mains power supply by turning the dial to "MAINS ONLY". The red light should start

flashing (except if geyser is already at thermostat setpoint temperature). NOTE THAT THE

ELON® WILL ONLY SWITCH TO MAINS 5 MINUTES AFTER MAINS POWER SWITCH-ON OR

RECONNECTION. This is to allow grid power to stabilize after a power failure.

c. Confirm that no power is supplied to geyser element when thermostat is open (turn

thermostat set point to lowest setting).

d. Set thermostat back at desired temperature (60 °C maximum).

14. Set control dial to setting “2” (the 6 o' clock position). (For new property development

installations, you can set the control dial to setting “1” (the 9 o’clock position). This ensures that

new residents can settle in before deciding on the setting that suits their habits best.)

Note: if doing any maintenance, rewiring or disconnecting the Elon® 100 or geyser element for any

reason, it is good practice to first switch off both the AC & DC circuit breakers / isolators, and then

disconnect one of the wires between the Elon® 100 and thermostat before disconnecting the rest

of the wires.

Figure 4.9 Label positions (see step 10 on previous page)

Please note: DO NOT install a separate timer on the AC side to try and regulate mains power use. Use

only the Elon’s control dial to control mains power use. If you install a second timer, it will work at

cross-purposes with the Elon and you will reduce performance and hot water availability.