Solar controller DeltaSol® AL E HE

The DeltaSol® AL E HE controller is especially designed for standard solar systems with a high-efficiency pump and an electric backup heating. It is equipped with a PWM output and two high-current relays to which an electric immersion heater of up to 3 kW (230 V~) can be connected. The heater can be directly connected to the controller without the need of auxiliary relays. For data communication, the controller has a RESOL VBus®.


Direct connection of an electric immersion heater up to 3 kW (230 V~)
DHW heating with rapid heat-up and thermal disinfection
Time and temperature control of the electric backup heating
Solar backup heating suppression
Heat quantity measurement via VFD Grundfos Direct Sensor™
PWM output for the speed control of a high-efficiency pump
Quick access to the holiday and the manual modes
Status display for a bidirectional HE pump
Drainback option and tube collector function
Commissioning menu

Inputs: for 4 Pt1000 temperature sensors, thereof 1 x RCTT, 1 x Grundfos Direct Sensor™ VFD, 1 x PWM feedback
Outputs: 1 semiconductor relay, 2 high-current relays for electric immersion heater, 1 PWM output
PWM frequency: 512 Hz
PWM voltage: 10 V
Switching capacity:
1 (1) A 240 V~ (semiconductor relay)
14 (3) A 240 V~ / 24 V⎓ (high-current relay, potential-free)
Power supply: 100 – 240 V~ (50 – 60 Hz)
Supply connection: type Y attachment
Standby: 0.67 W
Temperature controls class: I
Energy efficiency contribution: 1 %
Mode of operation: type 1.B.Y 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, heat quantity measurement, time-controlled thermostat function, DHW heating with rapid heat-up, thermal disinfection, holiday mode and backup heating suppression
Housing: plastic, PC-ABS, and PMMA
Mounting: wall mounting, mounting into patch panels is possible
Indication/Display: System-Monitoring-Display for visualization, 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 at the front of the housing
Ingress protection: IP 20 / DIN EN 60529
Protection class: I
Ambient temperature: 0 … 40 °C
Pollution degree: 2
Dimensions: 144 x 208 x 43 mm

popup overlay