The RESOL DeltaSol® SLL is the smallest controller of the SL series. Its equipment is optimised for small and medium-sized solar thermal and heating systems, 10 pre-configured basic systems are available.

The DeltaSol® SLL is also the first controller of its category to offer the automatic function control according to the VDI 2169 directive.

Additionally, it is equipped with a potential-free extra-low voltage relay for backup heating demand and a V40 flowmeter input for heat quantity measurement.

Versatile and easy to operate!

  • 3 relay outputs (inc. 1 potential-free extra-low voltage relay)
  • 4 inputs for Pt1000, Pt500 or KTY temperature sensors
  • 1 V40 impulse input
  • 2 PWM outputs for the speed control of high-efficiency pumps
  • 10 basic system layouts to choose from
  • Automatic function control according to VDI 2169

RESOL have over 40 years manufacturing experience and their products currently control more than 4 million systems in over 70 countries worldwide.

The products we use in our solar thermal systems: