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The RESOL DeltaSol® AL solar controller is a temperature differential controller that offers all the vital functions for a standard solar thermal system. The controller is equipped with the comprehensive System-Monitoring-Display, which shows the system parameters quickly and easily. For data communication, the controller has a VBus®. Operation and function controls are simple as usual.    

Manuals available:
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  • System-Monitoring-Display
  • Up to 3 Pt1000 temperature sensors
  • Heat quantity measurement
  • Function control
  • Operating hours counter
  • Intuitive operating concept
  • RESOL VBus®
  • Extra-low standby power consumption
  • 1 x 20m FKP6 roof sensor
  • 1 x 2.5m FRP6 tank sensor



Max. number of collector fields: 1
Max. number of stores: 1

Temperature sensor inputs: 3
Sensor type: pt1000
Relay outputs in total: 1
■ electromechanical relay: 1
Data interface: VBus®
Power supply:100 ... 240 V~

Heat quantity measurement
■ with flowmeter  

Software functions
Antifreeze function for solar circuit
Collector minimum limitation
Collector emergency shutdown
Store maximum limitation
Store emergency shutdown
Tube collector function
Cooling functions and cooling mode
Function control

Inputs: 3 Pt1000 temperature sensors
Outputs: 1 electromechanical relay with change-over contact
Switching capacity: 4 (1) A 240 V~ (electromechanical relay)
Total switching capacity: 4 A 240 V~
Power supply: 100 ... 240 V~ (50 ... 60 Hz)
Supply connection: type Y attachment
Standby: 0.33 W
Mode of operation: type 1.B action
Rated impulse voltage: 2.5 kV
Data interface: RESOL VBus®
VBus® current supply: 35 mA
Functions: Function control, operating hours counter, tube collector function and heat quantity measurement. The controller is additionally equipped with a time-controlled thermostat function.
Housing: plastic, PC-ABS and PMMA
Mounting: wall mounting, mounting into patch panels is possible
Indication/Display: LCD graphic system-monitor for visualisation, 16-segment display, 7-segment display, 8 symbols for system states, background illumination and operating control LED
Operation: 3 push buttons and 1 slide switch
Ingress protection: IP 20 / IEC 60529 (with IP 22 seal)
Protection class: II
Ambient temperature: 0 ... 40 °C
Pollution degree: 2
Dimensions: 144 x 208 x 43 mm
Bus: RESOL VBus® (max. current drain 35 mA)
Protection class: II