| | SCU124 | SCU224 | Vitosolic 200 |
| Relay outputs | 2 | 2 | 6 |
| Sensor inputs | 4 | 4 | 8 |
| System layouts | 2 | 9 | 15 |
| Number of heat loads (tanks) | 1 | 2 | 3 |
| Additional Δ T control logic | – | 1 | 2 |
| Thermostat function (heat rejection, excess solar energy use, reheating by boiler) | 1 | 1 | 2 |
| kWh meter | √ | √ | √ |
| Emergency collector shut-off | √ | √ | √ |
| V-Bus accessories | √ | √ | √ |
| Pump operating hour counter | √ | √ | √ |
| Illuminated LCD display | √ | √ | √ |
| Collector cooling function (to protect glycol from overheating) | √ | √ | √ |
| East-west collector arrays | – | √ | √ |
| Boiler suppression | – | – | √ |
| External heat exchanger | – | – | √ |
| Bypass function | – | – | √ |
| Optional Solar-Divicon mounting kit | √ | √ | – |
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