HydroCon SOLT 25-650

Solar multi-layer charging unit

Ready for operation with integrated system controller grandis 650 HK
Equipped with a high-efficiency pump class A from Wilo. Flow meter in the solar circuit and buffer circuit. Heat exchanger for 25 kW. For collector surfaces up to 50 m . Pre-wired for direct operation.
Article Description
1401HS-SOLT25-650-1A-G HydroCon SOLT 25-650, solar layer station
1401HS-SOLT25-1A-G Solar layer station without controller

General Details


  • Optimum heat transfer due to plate heat exchanger
  • For systems with buffer accumulator and multi-layer charge accumulator
  • Buffer accumulator remains maximally cool in the lower area
  • Maximal solar outflow temperatures are reached due to the speed-controlled flow rate
  • Even in the case of diffuse solar radiation, the maximum solar yield is guaranteed by the speed control and optimal heat transfer via the plate heat exchanger
  • Integrated flow transmitter and temperature sensor
  • Valve for layer charge
  • Filling and flushing device
  • Safety fittings



Technical Data

Technical Data Layer charging unit

Dimensions:W x H x D in mm: 496 x 930 x 325Solar pump:Yonos Para HU 25/7.0
Cover:EPP blackNominal voltage:230 V AC / 50 Hz
Weight:24 kgNominal output:3-45 W
KFE filling and drain valve:G3/4" ext. threadMax. conveying height:max. 7 m
Solar filling nozzle(A):G3/4" ext. threadBuffer charging pumpYonos Para HU 25/7.0
Solar drain nozzle(B):G3/4" ext. threadNominal voltage:230 V AC / 50 Hz
Return flow buffer (C):G1" ext. threadNominal output:3-45 W
Flow buffer, centre/top (D/E):G1" ext. threadMax. conveying height:max. 7 m
Solar flow (F):G1" ext. threadPlate heat exchanger:Glycol/Wasser
Solar return flow (G):G1" ext. threadOutput:25 kW
Expansion tank nozzle (H):G3/4" ext. threadInlet temperature:60°C (Glycol) / 29°C (Wasser)
Max. operating pressure:Collector circuit: max. 6 bar
Buffer circuit: max. 3 bar
Outlet temperature:35°C (Glycol) / 54°C (Wasser)
Flow rate:1000 l/h

Technical data grandis 650 HK

Operating voltage:AC 230 Volt, 50 Hz, –10 to +15 %Interfaces:RS 485 for ProBusX
Standby consumption:1,0 WInputs:10 temperature inputs for temperature sensors PT 1000 (protected by varistors), measuring range: –30 °C to +250°C
1 radiation sensor input
2 interfaces for VFS sensor
Temperature control class:VIIIProtection:Microfuse TR 5 Typ 372, 4 A/T (4 A, slow)
Correction factor:5 %Ambient temperature:0 to +40 °C
7 outputs:Electronic semiconductor relay, 230 V AC, 50 Hz,
min. 10 mA, max. 150 W, with cos f >=0,9
Storage temperature:–10 to +60 °C
1 output R0:Relay, potential-free normally open contact,
max. 250 V AC / 1 A
Housing material:100 % recyclable ABS housing
3 control outputs for HE pumps:PWM signal: 1kHz, ViL < 0,5 V DC, ViH > 9 V DC, 10 mA max.
Analog signal: 0 …+10 V DC +/– 3%, 10 mA max.
Dimensions:L x W x D in mm 176 × 162 × 44
Total output of all outputs:max. 300 WProtection class:IP30 according to DIN 40050, EN 60529