Choosing the right pool solar heating controller can optimize energy use, extend pool season, and keep water at a comfortable temperature. This article highlights five solid options that work across common solar heating setups, featuring models that support 12/24VAC and 120/240VAC outputs, valve actuation, and smart differential temperature control. Each entry includes key features, compatibility notes, and practical considerations to help you compare models at a glance.
Summary of chosen products
| Product | Brand | Output/Compatibility | Key Benefit |
|---|---|---|---|
| Replacement for Hayward Goldline GL-235 AquaSolar | E-cowlboy | 12/24VAC; 120/240VAC output; 24VAC valve actuation | OEM-style replacement with flexible voltage options |
| Hayward GLC-2P-A Solar Pool Heating Control System | Hayward | 24V valve actuation; 2 sensors | Comprehensive included hardware for solar heating |
| WERLAHO GL235 Replacement for Hayward | WERLAHO | 12/24VAC and 120/240VAC; 1HP/2HP support | Direct compatibility and programmable controls |
| Bonbo GL-235 Pool Solar Temperature Controller | Bonbo | 12/24VAC; 120/240VAC; high-limit control | Wide application and easy setpoint management |
| Hayward GL235/ AquaSolar Controller Alternative | Hayward | 12/24VAC; solar heating with automatic mode | Trusted brand with reliable solar control |
Replacement for Hayward Goldline GL-235 AquaSolar
This differential temperature controller is designed to automate solar heating or cooling for pools, spas, and hot tubs. It supports selectable low and high voltage outputs, enabling compatibility with modern solar control systems as well as legacy equipment. The unit is an OEM-style upgrade for several Hayward part numbers and features a calibrated temperature dial from 75°F to 104°F with an optional solar-off position.
Key features include a weatherproof enclosure, LED indicators for system status, and programmable recirculation freeze protection. It also supports automatic nocturnal cooling and booster pump control, depending on installation needs. Output options include 115VAC or 240VAC with SPST-NO contacts for pumps or actuators, and a jumper to support 12VAC output for older valve actuators.
Hayward GLC-2P-A Solar Pool Heating Control System
This bundle includes a 3-way valve, actuator, and two temperature sensors to automatically maximize solar heat collection. The controller actuates a 24V valve whenever solar heat is available and provides LED indicators to show system operation. It is designed for straightforward integration with existing pool controls and solar loops, making it a convenient all-in-one option for solar heating setups.
WERLAHO GL235 Replacement for Hayward
This intelligent solar water heat controller precisely regulates solar thermal energy for pools and spas using automatic differential temperature control. It emphasizes efficient heat collection with modes for heating or nocturnal cooling, plus programmable recirculation and LED status indicators. The device supports 12VAC/24VAC valve actuation and works with 115VAC or 240VAC high-voltage outputs for pump control. It’s positioned as a universal replacement for Hayward GL-235 family units.
WERLAHO GL235 Control Board Replacement
This control board replacement offers intelligent solar water heat control for pools and spas with automatic differential temperature adjustment. It provides a calibrated 75°F–104°F temperature range, solar-off option, and adjustable high-limit safety control. It also includes 12VAC/24VAC valve actuation compatibility and supports 115VAC/240VAC high-voltage outputs, making it suitable for residential and commercial pool systems seeking seamless integration with existing controls.
Hayward GL-235 AquaSolar Pool Solar Temperature Controller
This Hayward controller is designed to automatically maximize solar heat collection with a precise, easy-to-read calibrated temperature setting. It lives in a UV-protected, weatherproof enclosure to withstand outdoor use while maintaining reliable operation. The device pairs well with standard solar heating loops and is a trusted solution for consistent pool temperature management.
2025 TPE24VA Pool Valve Actuator (NO Brake)
This 24-volt valve actuator is designed for universal compatibility with all 24VAC control systems. It supports auto-rotation for 2-way and 3-way valves and includes a manual control switch for flexible operation. The actuator is built with a durable, corrosion-resistant shield to endure outdoor conditions and is suitable for pools, solar heating, spas, and related water features.
Buying Guide: Key Considerations for Pool Solar Heating Controllers
- Voltage compatibility: Verify that the controller supports your system’s voltage (12VAC, 24VAC, 115VAC, or 240VAC) and the valve actuator type you use.
- Valve compatibility: Many controllers rely on 2-way or 3-way valve actuators. Ensure the unit supports your valve brand and configuration (2-way/3-way) and offers easy jumper options if needed.
- Temperature control range: A typical desirable range is around 75°F–104°F, with a solar-off position for periods of non-use. Confirm the dial calibration and stability.
- Protection and enclosure: Outdoor pool controllers should have weatherproof, UV-protected enclosures and LED indicators for status monitoring in bright conditions or dim lighting.
- Automatic features: Look for programmable recirculation freeze protection, nocturnal cooling, and automatic heating/cooling logic that optimizes solar energy use without manual intervention.
- Installation scope: Some kits include valves, actuators, and sensors, while others are bare controller boards. Consider whether you need a full system bundle or a replacement module.
- Compatibility with existing systems: If upgrading an older Hayward or Goldline unit, confirm direct replacement compatibility and whether any jumper settings are required to match your original configuration.
- Reliability and support: Choose brands with a track record in pool heating, and check warranty terms and available replacement parts for longer service life.
- Energy efficiency impact: A well-tuned controller can maximize solar gain and reduce reliance on back-up heaters, leading to lower energy use and extended swimming seasons.
In choosing a pool solar heating controller, align your choice with the size of your solar system, the type of valve actuators used, and whether you prefer a bundled solution (valves and sensors included) or a replacement controller that integrates with your existing components. The models above cover a range of compatibility and feature sets to help you optimize efficiency while maintaining straightforward operation.