Best Pool Solar Heating Controller Options for Efficient Heating
The following selection focuses on reliable pool solar heating controllers that optimize solar heat collection, protect against freezing, and integrate with common 12/24VAC and 120/240VAC systems. Each option supports automatic heating and cooling modes, with straightforward controls for setting target temperatures. The table below summarizes five strong choices, so you can compare compatibility, outputs, and features at a glance.
| Product | Brand | Key Features | Output Compatibility |
|---|---|---|---|
| Hayward GL-235 AquaSolar | Hayward | Automatic heating, precise temp setting, UV-protected enclosure | 12/24VAC and 120/240VAC |
| Replacement for Hayward GL-235 AquaSolar (E-cowlboy) | E-cowlboy | Differential temp control, adjustable high limit, weatherproof | 12/24VAC and 115/240VAC |
| WERLAHO GL235 Replacement | WERLAHO | Differential temp control, nocturnal cooling, LED indicators | 12/24VAC and 120/240VAC |
| Bonbo GL-235 Replacement | Bonbo | Wide application, auto heating or cooling, adjustable temp | 12/24VAC and 120/240VAC |
| Thiadrs TPE24VA 24-Volt Actuator | Thiadrs | Universal compatibility, manual control, adjustable cam | 24VAC control systems |
Note: The selection emphasizes compatibility with common pool features such as 24V actuators, valve control options, and robust weatherproofing, ensuring dependable operation across residential and commercial setups.
Replacement for Hayward GL-235 AquaSolar
This differential temperature controller is designed for solar heating or cooling across pools, spas, and hot tubs. It supports selectable low/high voltage outputs and serves as a direct OEM-style replacement for multiple Hayward models. A single dial allows setting the desired pool/spa temperature, while an LED indicator shows system status. The unit includes a weatherproof enclosure and offers programmable features such as recirculation freeze protection and nocturnal cooling, with optional booster pump control.
Key capabilities include input power options of 115V or 240V and an output that controls a 24V valve actuator. A jumper lets you select 12V or 24V output for different valve actuators, and the high/low voltage outputs enable flexible integration with existing pool pumps and controllers.
Hayward GLC-2P-A Solar Pool Control System
This system comes with a 3-way valve, actuator, and two temperature sensors to maximize solar heat collection. It automatically actuates a 24V valve when solar heat is available and provides LED indicators for quick status checks. The integrated components simplify installation for solar pool heating projects and help ensure efficient operation through automatic valve actuation and monitoring.
WERLAHO GL235 Replacement for Hayward
Intelligent solar water heat control provides precise regulation of solar energy with automatic differential temperature control. It optimizes heat collection and supports heating or nocturnal cooling modes. Features include programmable recirculation freeze protection and LED status indicators for clear operation feedback. The unit is designed as a direct replacement for Hayward models GL-235 family.
With 12V/24V actuator compatibility and support for 115V or 240V high-voltage outputs, this controller integrates with a wide range of pool control systems. The universal design ensures compatibility with common pool pumps and valve actuators, making it a versatile retrofit option.
Bonbo GL-235 Pool Solar Controller Replacement
Bonbo’s GL-235 replacement supports energy-efficient solar pool heating and cooling for pools, spas, and hot tubs. The unit covers 12/24VAC and 120/240VAC outputs and offers installer-programmable features to match diverse system needs. Temperature range control from 75°F to 104°F and a high-limit setting help maintain desired water conditions while leveraging solar energy.
The automatic heating and cooling feature ensures the pool reaches and maintains comfort levels without manual intervention. Recirculation freeze protection guards against winter damage, and the design emphasizes a straightforward setup for existing Hayward or compatible systems.
Thiadrs TPE24VA 24-Volt Valve Actuator
Designed for universal compatibility with 24VAC control systems, this valve actuator supports two-way and three-way valves and offers auto-rotation for reliable flow control. A manual control switch adds flexibility, while an adjustable cam setting tailors valve performance for pools, spas, solar heating, and water features. The unit is built to withstand outdoor conditions with corrosion resistance and robust construction.
The actuator supports seamless integration with Pentair, Compool, Ortega, or Jandy valves and is suitable for retrofits or new installations. Its universal design reduces the need for additional parts, streamlining installation in solar heating setups.
Buying Guide: Key Purchase Considerations
- System compatibility: Confirm the controller’s output voltage (12V/24V or 120V/240V) matches your pump and valve actuators.
- Control features: Look for differential temperature control, heating/cooling modes, and programmable freeze protection for year-round reliability.
- Valve actuator compatibility: Ensure the controller works with your existing 2-way or 3-way valve actuators and any preferred brands.
- Ease of installation: Favor units with clear installation instructions, a weatherproof enclosure, and jumper settings that accommodate older equipment.
- Diagnostics and indicators: LED indicators or status displays help monitor system performance and troubleshoot quickly.
- Reliability and durability: A robust build and weatherproof housing protect the controller in outdoor pool environments.
- Retrofitting vs. new installs: Check whether the unit can replace your current controller directly or requires minor wiring changes.
When selecting a pool solar heating controller, consider your climate, pool size, and whether you want automated cooling in addition to heating. A controller with clear indicators and straightforward dial adjustments makes routine maintenance easier and can improve overall solar efficiency by ensuring your system operates at the optimal temperature range.