Product Overview

The Hayward Aqua Solar Pool Control with low voltage output | GL-235 is a reliable solar pool control designed to automatically manage solar heating for pools, spas, and hot tubs. This controller uses differential temperature control to compare pool water temperature with solar collector temperature, helping the system send water through the solar panels when heat is available.

Designed for simple and dependable operation, the GL-235 helps pool owners maintain a desired water temperature while improving solar heating efficiency. With low-voltage output for controlling a solar valve actuator, adjustable temperature control, LED status indicators, freeze protection, and selectable nocturnal cooling, this control is a practical solution for solar pool heating systems.

Ideal For

The Hayward GL-235 Aqua Solar Pool Control is ideal for:

Residential solar pool heating systems
Pools, spas, and hot tubs using solar collectors
Systems requiring low-voltage solar valve actuator control
Pool owners who want automatic solar temperature management
Solar heating systems needing freeze protection capability
Installations where nocturnal cooling control is desired
Pool professionals installing or replacing solar pool controls

Key Features

Differential Temperature Control

The GL-235 compares pool water temperature with solar collector temperature and activates the solar system when the collectors can provide useful heat.

Low-Voltage Solar Valve Output

This controller provides low-voltage output for controlling a compatible automatic solar valve actuator, helping direct water through the solar collectors when heating is needed.

Adjustable Desired Temperature Setting

The control allows users to select the desired pool temperature, helping maintain comfortable water conditions through automatic solar operation.

Selectable High Limit Control

The GL-235 includes an adjustable temperature limit to help prevent overheating and provide better control over solar heating operation.

LED Status Indicators

Easy-to-read LED indicators show system status, helping users and service professionals quickly understand operating conditions.

Freeze Protection Option

The programmable recirculation freeze protection feature can help circulate warmer pool water through the solar collectors when freeze conditions are detected.

Nocturnal Cooling Capability

Selectable nocturnal cooling allows the system to help cool pool water by circulating through the solar collectors at night when conditions are appropriate.

Microprocessor-Based Operation

The microprocessor-based design supports accurate, reliable performance and automatic system control.

Weatherproof Enclosure

The GL-235 is housed in a locking, weatherproof enclosure designed for outdoor pool equipment environments.

Professional Installation Solution

Because solar controls involve electrical wiring, sensor placement, valve actuator wiring, and system configuration, professional installation is recommended.

Benefits

The Hayward GL-235 Aqua Solar Pool Control helps make solar pool heating easier and more efficient by automatically managing when water should be routed through the solar collectors. Instead of relying on manual valve adjustments, the controller uses temperature sensors and differential control logic to help maximize available solar heat.

For pool owners, this can improve comfort, reduce manual operation, and help make better use of solar heating equipment. Features such as freeze protection, nocturnal cooling, LED indicators, and adjustable temperature settings make the GL-235 a dependable control option for compatible solar pool heating systems.

Specifications

Customer-Facing Q&A

What is the Hayward GL-235 used for?

The Hayward GL-235 is used to automatically control solar heating for pools, spas, and hot tubs. It monitors pool and solar collector temperatures and activates the solar system when heat is available.

Does this control a solar valve actuator?

Yes. The GL-235 provides low-voltage output for controlling a compatible 24VAC automatic solar valve actuator.

Can this help heat my pool with solar panels?

Yes. When installed with a compatible solar heating system, the GL-235 helps route pool water through the solar collectors when the collectors are warmer than the pool water.

Does this controller have freeze protection?

Yes. The GL-235 includes programmable recirculation freeze protection, which can help circulate pool water through the solar collectors when freeze conditions are detected.

Can it cool the pool at night?

Yes. The GL-235 includes selectable nocturnal cooling, allowing the system to circulate water through the collectors at night to help cool the pool when conditions are suitable.

Does this include temperature sensors?

Sensors are not confirmed for this product configuration and may vary by package. Customers should verify included components before ordering.

Is this the same as a complete solar heating system?

No. This is the solar control only. It does not include solar panels, plumbing, sensors unless specified, valve actuator, pump, or additional installation components.

Is professional installation recommended?

Yes. Installation requires proper wiring, sensor placement, actuator connection, solar plumbing coordination, and system setup. Professional installation is strongly recommended.