SR201 Solar Water Heater Controller
Product Introduction
The SR201 solar water heater controller is a microcomputer-based, fully automatic control system specially designed for integrated non-pressure solar water heaters. Built with a high-performance 32-bit single-chip microcomputer, this intelligent controller delivers precise, reliable operation for residential and commercial solar heating systems.
All electronic components are manufactured to industrial standards, ensuring stable performance even in harsh environments, including cold temperatures, high heat, and high humidity. A dedicated clock chip guarantees accurate time-based control, making the SR201 ideal for applications requiring scheduled filling, heating, and pipe insulation.
With a clear LCD display, sleek design, and easy installation, the SR201 controller has become the preferred choice for solar water heater manufacturers and installers worldwide. It is available in both Chinese and English language versions, making it suitable for both domestic and international markets.
Key Features & Benefits
High-performance 32-bit MCU: Fast, responsive control logic with stable performance
Dual-language support: Chinese and English versions for global users
Wide operating range: Works reliably from -10℃ to 50℃ ambient temperature
Precise temperature control: ±1℃ accuracy for both tank and collector measurements
Multiple safety protections: Anti-freezing, overheat, overflow, and low-pressure safeguards
Low-maintenance design: IP40 enclosure and industrial-grade components for long service life
Easy installation and setup: Compact size and user-friendly interface
Main Technical Specifications
| Parameter | Specification |
|---|---|
| Model | SR201 Solar Water Heater Controller |
| Housing Dimensions | 187mm × 128mm × 46mm |
| Power Supply | 100–240V AC, 50–60Hz |
| Temperature Measurement Accuracy | ±1℃ |
| Tank Temperature Measuring Range | 0℃ ~ 99℃ |
| Temperature Control Accuracy | ±1℃ |
| Maximum Water Loading Pump Power | ≤200W |
| Maximum Heating Cable Power | ≤600W |
| Maximum Electric Backup Heating Power | ≤1500W |
| Solenoid Valve Options | DC 12V / AC 220V (pressure or low-pressure type) |
| Pressure Valve Working Pressure | 0.02MPa ~ 0.8MPa (for tap water supply) |
| Non-Pressure Valve Working Pressure | 0.0MPa (for tank-fed or low-pressure water supply) |
| Ambient Operating Temperature | -10℃ ~ 50℃ |
| Water Proof Grade | IP40 |
Full List of Functions
Time setting for accurate scheduling
Three-section timed water filling and heating for customized daily use
Pipe insulation (heating cable) function to prevent freezing in cold weather
Booster pump control for improved water flow
Hot water circulation function to maintain consistent water temperature
Delayed water filling when the tank is low on water
Celsius/Fahrenheit unit switch for international use
Beeper error warning system for quick fault alerts
Forced water filling function for emergency use
Manual water filling override option
Manual heating override option
Tank high-temperature protection to prevent overheating
Collector tube overheat protection for safety
Tank anti-freezing protection in low temperatures
Low water pressure protection to prevent damage
Overflow protection to avoid water waste
Memory protection to retain settings during power outages
Screen saver function to reduce power consumption and extend display life
Applications
The SR201 solar controller is widely used with non-pressure integrated solar water heaters, including residential solar heating systems, small commercial installations, and off-grid solar water heating projects. It is compatible with both tap water and low-pressure tank-fed water supplies, making it a versatile solution for different installation scenarios.