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Senztek Solar Hot Water Controllers & Sensors
Senztek controllers are fitted to a very large share of Australian solar hot water systems, often badged as something else entirely — Apricus, Edson, AAE, Bosch, Endless Solar, SolarArk, ZEN, Rotex, Reclaim and Chromagen units are frequently Senztek underneath.
If your system isn't working — no hot water, wrong temperatures, or the pump not running — the controller is often the cause.
✔ Solar circulation controllers (SolaStat)
These manage circulation between the roof collectors and the tank using temperature sensors. This is the controller most systems have.
- 1-2 sensor — roof + one tank sensor, for tanks with a single sensor port
- 1-3 sensor — roof + tank + inlet. All three sensors must be connected.
- 2-3 sensor — roof + tank + inlet, with a second output for the electric booster element. All three sensors must be connected.
Match the model on your existing controller. If you're unsure, email us a photo of the controller and the sensor ports on your tank, and we'll confirm the right one.
✔ Booster element controllers (AlphaStat)
These manage the electric heating element, controlling when the system boosts using electricity rather than the sun. Fitted to systems with electric backup heating.
✔ Heat pump controllers (Reclaim)
The Reclaim Heat Pump Controller V1.1 is a Senztek controller, supplied pre-programmed with the tank sensor and RJ45 cable fitted. It suits Reclaim CO₂ heat pump systems only — it is not a substitute for a SolaStat or AlphaStat.
✔ Replacement boards
Where only the circuit board has failed and the enclosure is sound, a replacement board is the cheaper fix. We carry boards for the SolaStat ST Plus, SolaSmart Plus and SolaSmart Lite ranges.
✔ Sensors
20m roof sensors and tank sensors to suit the Senztek range, including the versions badged for Apricus, AAE, Edson, Bosch, Endless Solar, SolarArk, ZEN and Rotex systems. Free thermal heat paste is included with most sensors and controllers.
✔ Complete pump stations
Pump station assemblies with a Senztek SolaStat controller and full enclosure — the simplest fix when the pump, controller and valves have all reached end of life together.
✔ Common signs your controller needs replacing
- No hot water or poor heating
- Pump not turning on
- Incorrect temperature readings
- System overheating or shutting down
- Booster or heat pump not operating correctly
✔ Why buy from us
- Full Senztek range, including the rebadged versions that are hard to identify
- Solutions for discontinued and hard-to-find systems
- Practical experience with solar hot water repairs
- Same-day dispatch before 3pm, free delivery over $150
✔ Not sure which one you need?
Email sales@solarhotwaterparts.com.au a photo of your existing controller and the label on your tank, and we'll identify the right replacement for you.
