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PowerOptimal Elon® 100 Installation Manual
Version date: 2022/05/23
Page 10 of 37
Version number: 2.20
© PowerOptimal (Pty) Ltd 2022. The content of this document is confidential and all rights to the intellectual
property and/or information contained herein remain vested in PowerOptimal, except if otherwise agreed in
writing.
4. Elon® 100 installation
1. Isolate the geyser – switch off the geyser circuit breaker at the main electrical distribution board
(DB) AND switch off the geyser isolator at the geyser.
2. Confirm with a multimeter that there is no voltage across the wires.
3. Install circuit breaker (or isolator and fuse) for solar PV (DC) supply. Also install AC supply isolator
/ circuit breaker if there is none. NB Ensure that the DC circuit breaker is rated for the DC voltage
and current of the installed solar PV array.
4. The circuit breakers / isolators must be installed within 1.5m of the geyser AND must be line of
sight / visible (i.e. do not install them at the back of the geyser).
5. The DC wires must not be earthed – i.e. they must be fully isolated from earth. Do NOT test with
a Megger.
6. Keep the DC wires as short as possible.
7. Avoid any coils in DC wires.
8. Recommended wiring size is at least 2.5 mm². Use panel wire for all connections to the Elon®
100.
9. Install the Elon® 100 unit according to wiring diagram (see Section 2).
a. Mount the Elon® 100 unit close to the geyser and protect from outside elements. The
maximum wire length between Elon® 100 and geyser is 3 m.
b. Mount the controller (remote control) inside or next to the main DB in the house or in
another convenient and accessible location (for example the garage). Double-sided
mounting tape and Genkem contact adhesive work well for most surfaces. When inserting
the controller wire into the Elon® 100 unit, make sure the connector clicks into place.
c. Connect the Elon® 100 and thermostat last.
You will have been provided with either a wiring kit (Figure 4.1 - FOLLOW INSTRUCTIONS 9A) OR an
element adapter (Figure 4.2 - FOLLOW INSTRUCTIONS 9B). See also the training videos on how to
install either of these here:
https://www.poweroptimal.com/elon-100-training/.
Figure 4.1 Wiring kit for TSE &
Thermowatt thermostats
Figure 4.2 Element adapter for TSE &
Thermowatt thermostats (front & side
view)