Heater solar water 2
TK-8A is a smart solar controller designed for non-pressurized solar water heaters, providing accurate temperature control and safe system operation.
The RIWATT TK-8A Non-Pressure Solar Water Heater Controller is designed for non-pressurized solar water heating systems, providing automatic temperature control, water level monitoring, and safe heating management. Compatible with RIWATT non-pressure solar heaters, it ensures reliable hot water supply for households, apartments, and commercial setups.

● Automatic Temperature Control: Maintains optimal water temperature without manual intervention.
● Water Level Monitoring: Works with float or probe sensors to prevent dry burning.
● LED Display: Real-time system status and temperature readings.
● Electric Heating Backup: Activates automatically when solar energy is insufficient.
● Overheat & Dry-Burn Protection: Ensures safe operation.
● Easy Installation: Compatible with RIWATT non-pressure solar water heaters.
● Energy Efficient: Low power consumption (<3W) with AC 220V input.
| TK-8A Solar Water Heater Controller Technical Parameters | ||
| Item | Specification | |
| Model | TK-8A | |
| Working Voltage | AC 220V ±10% | |
| Power Consumption | < 3W | |
| Temperature Range | 0°C – 99°C | |
| Control Mode | Automatic & Manual | |
| Water Level Control | Float sensor / probe | |
| Display | LED digital display | |
| Output Control | Solenoid valve / Pump / Heater | |
| Protection Function | Overheat, dry burning, overflow | |
| Installation Type | Wall-mounted | |
The TK-8A controller constantly monitors the water temperature and level in the solar tank using sensors. Based on the readings:
It automatically controls the water inlet valve to maintain correct water levels.
Activates the electric heating system when solar energy is insufficient.
Provides overheat and dry-burn protection for safe operation.
Displays system information on the LED panel for easy monitoring.
This ensures a stable hot water supply for daily use without manual intervention.
Remark:
For non-pressurized solar water heaters, besides using a controller, you can also use an assistant tank for automatic cold water loading.
It ensures stable water supply and protects the system from dry burning.
👉 For more details about the assistant tank, please click here.

● Non-pressure solar water heaters
● Household solar hot water systems
● Apartment or dormitory solar installations
● Solar-assisted electric water heating systems
● Commercial solar water heating projects

No, the TK-8A is specifically designed for non-pressurized solar water heater systems.
Yes, the controller can automatically activate the electric heater when solar energy is insufficient.
You need temperature sensors and a water level sensor (float or probe type) for proper operation.
Yes, it has a power failure memory function to keep all settings intact.

Sorry, no posts matched your criteria.
You can contact us any way that is convenient for you. We are available 24/7 via fax, email or telephone.
WhatsApp us