Aestiva 2 Sensor Solar Controller (includes free thermal heat paste)


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Aestiva 2 Sensor Controller (includes free thermal heat paste)

Solar Hot Water Parts includes heat transfer paste and joiners with this controller.

Controller includes:

    1 x 20 roof sensor

    1 x tank sensor

    Thermal heat paste included for roof sensor installation


  • Designed in Australia for Australian conditions.
  • Comes with most features and end-user adjustability.
  • All connections are plug and play.


  • Fully digital LCD display
  • Automatic tank sensor addition
  • Waterproof controller
  • Smart Heat Management (SHM) mode for summer stagnant overheating.

Product Details

Model: Aestiva S2011 Solar Differential Controller

Display: White Back-lit LED Screen

Power Leads: 2 m Main Power Lead, 40 cm Pump Socket Lead

Tank Sensors: Default one lower tank sensor. 

Roof Sensor: 20 m, quick-release connection. Rated for 300°C, to be used in both evacuated tube and flat plate collector panels.

Water Proof: IP54 Tested

Max Load Power: 600W

Australian Electrical Approval number: SAA151245 

Connection: Fully Plug and Play

Functions: Differential Control, Frost Protection, Top Out Protection, Manual Pump, SHM

Special Feature: Every Aestiva controller comes with Smart Heat Management (SHM) mode.

During summer, the tank can reach top out temperatures during the day and the collectors will be in an overheating/stagnation condition, generating steam and unnecessary stress to the solar systems. Sometimes, it may appear as a loud banging noise.

When the SHM mode is activated, the Aestiva controller detects this condition and activates reverse differential solar control during night time to cool down the bottom half of the tank. The bottom tank water will start cooling in 2nd day and prevents stagnation from occurring. The top half tank is unaffected, as the circulation only happens at the lower half of the tank, so hot water usage during the morning is no issue.

The SHM mode can be set using Program Mode by the end-user. This is handy during the holiday season, when you may be away from home for an extended period of time.

Solar Hot Water Parts is an approved Aestiva distributor. We are continually extending our solar hot water spare parts catalogue to give you the best selection of solar hot water replacement parts to choose from.

We sell the widest range of spare parts to suit any solar hot water service, whether it be a flat plate panel or evacuated tube solar collector. The Solar Hot Water Parts range is now online and ready to order, with complete tech specs to ensure your seamless selection.