SR501 Tuya WIFI Solar Water Heater Controller

Key Features & Benefits

• Tuya WIFI smart control: Remote monitoring and control via smartphone app

• Latest NEC high-performance MCU: Fast, responsive control logic with stable performance

• Comprehensive safety protections: Anti-freezing, overheat, overflow, low-pressure, tank high-temperature safeguards

• Flexible heating power options: Heating element support for ≤1500W / ≤3000W (dual model options)

• Precise temperature management: ±2℃ accuracy for tank temperature measurements and control

• Multi-functional timing control: Three-section timed water filling, heating and recirculation

• Intelligent water management: Constant water level filling, temperature-controlled filling, low water level delay filling

• User-friendly operation: Celsius/Fahrenheit unit switch, manual override functions, error code display

• Low-maintenance design: Industrial-grade components, memory protection for power outages, screen saver function

• Versatile valve compatibility: DC 12V / AC 220V solenoid valves (pressure or low-pressure type)

Main Technical Specifications

Full List of Functions

• SET CLOCK - Clock setting for accurate time scheduling

• Timing control water loading and backup heating at preset three time sections

• Temperature controlled water loading

• CTH (Constant Temperature Heating) function

• LWPR (Low Water Pressure Protection) function

• CWL (Constant Water Level Filling) (preset 100% tank water level)

• PUMP (Water filling pump) control function

• TCYC (Temperature/Flow Recirculation) within three time-sections

• AH (Automatic Thermostat) function

• OTF (Three Time-Sections Setting) for customized operation

• TKPR (Tank High Temperature Protection) function

• CFR (Tank Anti-Freezing Protection) function

• LWS (Preset Water Level Filling) for low water tank conditions

• LWSD (Run-on time of water filling) for low water tank conditions

• OTDI (Thermal Disinfection) function for hygienic water supply

• UNIT (Celsius/Fahrenheit) temperature unit switch

• BEEP (Beeper Error Warning) system for quick fault alerts

• Manual water filling override option

• Compulsive water filling function for emergency use

• Manual heating override option

• Manual DHW (Domestic Hot Water) circulation

• Factory reset manually

• Water level & water temperature sensor sensitivity adjustment

• Pipe anti-freezing protection function

• View the measuring value function

• Overflow protection to avoid water waste and damage

• High temperature protection of collector tube

• Memory protection to retain settings during power outages

• Screen protection (screen saver) function to extend display life

• Trouble protection system

• Error code description for easy troubleshooting

• Tuya WIFI remote control & monitoring via smartphone APP

Applications

The SR501-Tuya-WIFI solar controller is widely used with integrated un-pressurized solar thermal systems, including residential smart solar heating systems, small commercial installations, and off-grid solar water heating projects. With Tuya WIFI connectivity, users can enjoy smart home integration and remote control capabilities. It is compatible with both direct tap water and low-pressure tank-fed water supplies, making it a versatile solution for different installation scenarios across global markets.