{"product_id":"haywardaquasolarpoolcontrolwithlowvoltageoutputgl235hppgl235","title":"Hayward Dual Differential Solar Control | GL-235","description":"\u003cp data-start=\"0\" data-end=\"20\"\u003e\u003cstrong data-start=\"0\" data-end=\"20\"\u003eProduct Overview\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp data-start=\"22\" data-end=\"402\"\u003eThe 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.\u003c\/p\u003e\n\u003cp data-start=\"404\" data-end=\"798\"\u003eDesigned 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.\u003c\/p\u003e\n\u003cp data-start=\"800\" data-end=\"813\"\u003e\u003cstrong data-start=\"800\" data-end=\"813\"\u003eIdeal For\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp data-start=\"815\" data-end=\"871\"\u003eThe Hayward GL-235 Aqua Solar Pool Control is ideal for:\u003c\/p\u003e\n\u003cp data-start=\"873\" data-end=\"1272\"\u003eResidential solar pool heating systems\u003cbr data-start=\"911\" data-end=\"914\"\u003ePools, spas, and hot tubs using solar collectors\u003cbr data-start=\"962\" data-end=\"965\"\u003eSystems requiring low-voltage solar valve actuator control\u003cbr data-start=\"1023\" data-end=\"1026\"\u003ePool owners who want automatic solar temperature management\u003cbr data-start=\"1085\" data-end=\"1088\"\u003eSolar heating systems needing freeze protection capability\u003cbr data-start=\"1146\" data-end=\"1149\"\u003eInstallations where nocturnal cooling control is desired\u003cbr data-start=\"1205\" data-end=\"1208\"\u003ePool professionals installing or replacing solar pool controls\u003c\/p\u003e\n\u003cp data-start=\"1274\" data-end=\"1290\"\u003e\u003cstrong data-start=\"1274\" data-end=\"1290\"\u003eKey Features\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp data-start=\"1292\" data-end=\"1328\"\u003e\u003cstrong data-start=\"1292\" data-end=\"1328\"\u003eDifferential Temperature Control\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp data-start=\"1330\" data-end=\"1481\"\u003eThe GL-235 compares pool water temperature with solar collector temperature and activates the solar system when the collectors can provide useful heat.\u003c\/p\u003e\n\u003cp data-start=\"1483\" data-end=\"1517\"\u003e\u003cstrong data-start=\"1483\" data-end=\"1517\"\u003eLow-Voltage Solar Valve Output\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp data-start=\"1519\" data-end=\"1697\"\u003eThis controller provides low-voltage output for controlling a compatible automatic solar valve actuator, helping direct water through the solar collectors when heating is needed.\u003c\/p\u003e\n\u003cp data-start=\"1699\" data-end=\"1741\"\u003e\u003cstrong data-start=\"1699\" data-end=\"1741\"\u003eAdjustable Desired Temperature Setting\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp data-start=\"1743\" data-end=\"1888\"\u003eThe control allows users to select the desired pool temperature, helping maintain comfortable water conditions through automatic solar operation.\u003c\/p\u003e\n\u003cp data-start=\"1890\" data-end=\"1923\"\u003e\u003cstrong data-start=\"1890\" data-end=\"1923\"\u003eSelectable High Limit Control\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp data-start=\"1925\" data-end=\"2061\"\u003eThe GL-235 includes an adjustable temperature limit to help prevent overheating and provide better control over solar heating operation.\u003c\/p\u003e\n\u003cp data-start=\"2063\" data-end=\"2088\"\u003e\u003cstrong data-start=\"2063\" data-end=\"2088\"\u003eLED Status Indicators\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp data-start=\"2090\" data-end=\"2218\"\u003eEasy-to-read LED indicators show system status, helping users and service professionals quickly understand operating conditions.\u003c\/p\u003e\n\u003cp data-start=\"2220\" data-end=\"2248\"\u003e\u003cstrong data-start=\"2220\" data-end=\"2248\"\u003eFreeze Protection Option\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp data-start=\"2250\" data-end=\"2409\"\u003eThe programmable recirculation freeze protection feature can help circulate warmer pool water through the solar collectors when freeze conditions are detected.\u003c\/p\u003e\n\u003cp data-start=\"2411\" data-end=\"2443\"\u003e\u003cstrong data-start=\"2411\" data-end=\"2443\"\u003eNocturnal Cooling Capability\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp data-start=\"2445\" data-end=\"2601\"\u003eSelectable nocturnal cooling allows the system to help cool pool water by circulating through the solar collectors at night when conditions are appropriate.\u003c\/p\u003e\n\u003cp data-start=\"2603\" data-end=\"2637\"\u003e\u003cstrong data-start=\"2603\" data-end=\"2637\"\u003eMicroprocessor-Based Operation\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp data-start=\"2639\" data-end=\"2740\"\u003eThe microprocessor-based design supports accurate, reliable performance and automatic system control.\u003c\/p\u003e\n\u003cp data-start=\"2742\" data-end=\"2768\"\u003e\u003cstrong data-start=\"2742\" data-end=\"2768\"\u003eWeatherproof Enclosure\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp data-start=\"2770\" data-end=\"2877\"\u003eThe GL-235 is housed in a locking, weatherproof enclosure designed for outdoor pool equipment environments.\u003c\/p\u003e\n\u003cp data-start=\"2879\" data-end=\"2917\"\u003e\u003cstrong data-start=\"2879\" data-end=\"2917\"\u003eProfessional Installation Solution\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp data-start=\"2919\" data-end=\"3077\"\u003eBecause solar controls involve electrical wiring, sensor placement, valve actuator wiring, and system configuration, professional installation is recommended.\u003c\/p\u003e\n\u003cp data-start=\"3079\" data-end=\"3091\"\u003e\u003cstrong data-start=\"3079\" data-end=\"3091\"\u003eBenefits\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp data-start=\"3093\" data-end=\"3433\"\u003eThe 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.\u003c\/p\u003e\n\u003cp data-start=\"3435\" data-end=\"3749\"\u003eFor 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.\u003c\/p\u003e\n\u003cp data-start=\"3751\" data-end=\"3769\"\u003e\u003cstrong data-start=\"3751\" data-end=\"3769\"\u003eSpecifications\u003c\/strong\u003e\u003c\/p\u003e\n\u003cdiv class=\"TyagGW_tableContainer\"\u003e\n\u003cdiv class=\"group TyagGW_tableWrapper flex flex-col-reverse w-fit\" tabindex=\"-1\"\u003e\n\u003ctable data-start=\"3771\" data-end=\"4935\" class=\"w-fit min-w-(--thread-content-width)\"\u003e\n\u003cthead data-start=\"3771\" data-end=\"3798\"\u003e\n\u003ctr data-start=\"3771\" data-end=\"3798\"\u003e\n\u003cth data-start=\"3771\" data-end=\"3787\" data-col-size=\"sm\" class=\"last:pe-10\"\u003eSpecification\u003c\/th\u003e\n\u003cth data-start=\"3787\" data-end=\"3798\" data-col-size=\"md\" class=\"last:pe-10\"\u003eDetails\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody data-start=\"3809\" data-end=\"4935\"\u003e\n\u003ctr data-start=\"3809\" data-end=\"3828\"\u003e\n\u003ctd data-start=\"3809\" data-end=\"3817\" data-col-size=\"sm\"\u003eBrand\u003c\/td\u003e\n\u003ctd data-start=\"3817\" data-end=\"3828\" data-col-size=\"md\"\u003eHayward\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"3829\" data-end=\"3858\"\u003e\n\u003ctd data-start=\"3829\" data-end=\"3844\" data-col-size=\"sm\"\u003eProduct Line\u003c\/td\u003e\n\u003ctd data-col-size=\"md\" data-start=\"3844\" data-end=\"3858\"\u003eAqua Solar\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"3859\" data-end=\"3877\"\u003e\n\u003ctd data-start=\"3859\" data-end=\"3867\" data-col-size=\"sm\"\u003eModel\u003c\/td\u003e\n\u003ctd data-start=\"3867\" data-end=\"3877\" data-col-size=\"md\"\u003eGL-235\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"3878\" data-end=\"3915\"\u003e\n\u003ctd data-start=\"3878\" data-end=\"3905\" data-col-size=\"sm\"\u003eManufacturer Part Number\u003c\/td\u003e\n\u003ctd data-col-size=\"md\" data-start=\"3905\" data-end=\"3915\"\u003eGL-235\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"3916\" data-end=\"3932\"\u003e\n\u003ctd data-start=\"3916\" data-end=\"3922\" data-col-size=\"sm\"\u003eSKU\u003c\/td\u003e\n\u003ctd data-start=\"3922\" data-end=\"3932\" data-col-size=\"md\"\u003eGL-235\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"3933\" data-end=\"3965\"\u003e\n\u003ctd data-start=\"3933\" data-end=\"3949\" data-col-size=\"sm\"\u003eUPC \/ Barcode\u003c\/td\u003e\n\u003ctd data-col-size=\"md\" data-start=\"3949\" data-end=\"3965\"\u003e761418003907\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"3966\" data-end=\"4003\"\u003e\n\u003ctd data-start=\"3966\" data-end=\"3981\" data-col-size=\"sm\"\u003eProduct Type\u003c\/td\u003e\n\u003ctd data-col-size=\"md\" data-start=\"3981\" data-end=\"4003\"\u003eSolar Pool Control\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"4004\" data-end=\"4055\"\u003e\n\u003ctd data-start=\"4004\" data-end=\"4019\" data-col-size=\"sm\"\u003eControl Type\u003c\/td\u003e\n\u003ctd data-col-size=\"md\" data-start=\"4019\" data-end=\"4055\"\u003eDifferential temperature control\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"4056\" data-end=\"4104\"\u003e\n\u003ctd data-start=\"4056\" data-end=\"4070\" data-col-size=\"sm\"\u003eOutput Type\u003c\/td\u003e\n\u003ctd data-col-size=\"md\" data-start=\"4070\" data-end=\"4104\"\u003eLow-voltage solar valve output\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"4105\" data-end=\"4176\"\u003e\n\u003ctd data-start=\"4105\" data-end=\"4122\" data-col-size=\"sm\"\u003eVoltage Output\u003c\/td\u003e\n\u003ctd data-col-size=\"md\" data-start=\"4122\" data-end=\"4176\"\u003e12\/24VAC and 120\/240VAC output commonly referenced\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"4177\" data-end=\"4247\"\u003e\n\u003ctd data-start=\"4177\" data-end=\"4193\" data-col-size=\"sm\"\u003eValve Control\u003c\/td\u003e\n\u003ctd data-start=\"4193\" data-end=\"4247\" data-col-size=\"md\"\u003eControls compatible 24VAC automatic valve actuator\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"4248\" data-end=\"4317\"\u003e\n\u003ctd data-start=\"4248\" data-end=\"4262\" data-col-size=\"sm\"\u003eApplication\u003c\/td\u003e\n\u003ctd data-start=\"4262\" data-end=\"4317\" data-col-size=\"md\"\u003eSolar heating control for pools, spas, and hot tubs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"4318\" data-end=\"4372\"\u003e\n\u003ctd data-start=\"4318\" data-end=\"4337\" data-col-size=\"sm\"\u003eHeating Function\u003c\/td\u003e\n\u003ctd data-start=\"4337\" data-end=\"4372\" data-col-size=\"md\"\u003eAutomatic solar heat collection\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"4373\" data-end=\"4424\"\u003e\n\u003ctd data-start=\"4373\" data-end=\"4392\" data-col-size=\"sm\"\u003eCooling Function\u003c\/td\u003e\n\u003ctd data-start=\"4392\" data-end=\"4424\" data-col-size=\"md\"\u003eSelectable nocturnal cooling\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"4425\" data-end=\"4493\"\u003e\n\u003ctd data-start=\"4425\" data-end=\"4445\" data-col-size=\"sm\"\u003eFreeze Protection\u003c\/td\u003e\n\u003ctd data-start=\"4445\" data-end=\"4493\" data-col-size=\"md\"\u003eProgrammable recirculation freeze protection\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"4494\" data-end=\"4565\"\u003e\n\u003ctd data-start=\"4494\" data-end=\"4516\" data-col-size=\"sm\"\u003eTemperature Control\u003c\/td\u003e\n\u003ctd data-start=\"4516\" data-end=\"4565\" data-col-size=\"md\"\u003eAdjustable desired temperature and high limit\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"4566\" data-end=\"4604\"\u003e\n\u003ctd data-start=\"4566\" data-end=\"4579\" data-col-size=\"sm\"\u003eIndicators\u003c\/td\u003e\n\u003ctd data-start=\"4579\" data-end=\"4604\" data-col-size=\"md\"\u003eLED status indicators\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"4605\" data-end=\"4651\"\u003e\n\u003ctd data-start=\"4605\" data-end=\"4617\" data-col-size=\"sm\"\u003eEnclosure\u003c\/td\u003e\n\u003ctd data-start=\"4617\" data-end=\"4651\" data-col-size=\"md\"\u003eLocking weatherproof enclosure\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"4652\" data-end=\"4720\"\u003e\n\u003ctd data-start=\"4652\" data-end=\"4671\" data-col-size=\"sm\"\u003eSensors Included\u003c\/td\u003e\n\u003ctd data-start=\"4671\" data-end=\"4720\" data-col-size=\"md\"\u003eNot confirmed \/ commonly sold as control only\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"4721\" data-end=\"4787\"\u003e\n\u003ctd data-start=\"4721\" data-end=\"4738\" data-col-size=\"sm\"\u003eCertifications\u003c\/td\u003e\n\u003ctd data-start=\"4738\" data-end=\"4787\" data-col-size=\"md\"\u003eNSF, UL, and cUL approved commonly referenced\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"4788\" data-end=\"4846\"\u003e\n\u003ctd data-start=\"4788\" data-end=\"4799\" data-col-size=\"sm\"\u003eWarranty\u003c\/td\u003e\n\u003ctd data-start=\"4799\" data-end=\"4846\" data-col-size=\"md\"\u003e5-year limited warranty commonly referenced\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"4847\" data-end=\"4908\"\u003e\n\u003ctd data-start=\"4847\" data-end=\"4867\" data-col-size=\"sm\"\u003eInstallation Type\u003c\/td\u003e\n\u003ctd data-start=\"4867\" data-end=\"4908\" data-col-size=\"md\"\u003eProfessional installation recommended\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"4909\" data-end=\"4935\"\u003e\n\u003ctd data-start=\"4909\" data-end=\"4924\" data-col-size=\"sm\"\u003eManufacturer\u003c\/td\u003e\n\u003ctd data-start=\"4924\" data-end=\"4935\" data-col-size=\"md\"\u003eHayward\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp data-start=\"4937\" data-end=\"4960\"\u003e\u003cstrong data-start=\"4937\" data-end=\"4960\"\u003eCustomer-Facing Q\u0026amp;A\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp data-start=\"4962\" data-end=\"5002\"\u003e\u003cstrong data-start=\"4962\" data-end=\"5002\"\u003eWhat is the Hayward GL-235 used for?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp data-start=\"5004\" data-end=\"5205\"\u003eThe 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.\u003c\/p\u003e\n\u003cp data-start=\"5207\" data-end=\"5252\"\u003e\u003cstrong data-start=\"5207\" data-end=\"5252\"\u003eDoes this control a solar valve actuator?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp data-start=\"5254\" data-end=\"5364\"\u003eYes. The GL-235 provides low-voltage output for controlling a compatible 24VAC automatic solar valve actuator.\u003c\/p\u003e\n\u003cp data-start=\"5366\" data-end=\"5415\"\u003e\u003cstrong data-start=\"5366\" data-end=\"5415\"\u003eCan this help heat my pool with solar panels?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp data-start=\"5417\" data-end=\"5591\"\u003eYes. 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.\u003c\/p\u003e\n\u003cp data-start=\"5593\" data-end=\"5641\"\u003e\u003cstrong data-start=\"5593\" data-end=\"5641\"\u003eDoes this controller have freeze protection?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp data-start=\"5643\" data-end=\"5815\"\u003eYes. The GL-235 includes programmable recirculation freeze protection, which can help circulate pool water through the solar collectors when freeze conditions are detected.\u003c\/p\u003e\n\u003cp data-start=\"5817\" data-end=\"5851\"\u003e\u003cstrong data-start=\"5817\" data-end=\"5851\"\u003eCan it cool the pool at night?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp data-start=\"5853\" data-end=\"6030\"\u003eYes. 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.\u003c\/p\u003e\n\u003cp data-start=\"6032\" data-end=\"6074\"\u003e\u003cstrong data-start=\"6032\" data-end=\"6074\"\u003eDoes this include temperature sensors?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp data-start=\"6076\" data-end=\"6218\"\u003eSensors are not confirmed for this product configuration and may vary by package. Customers should verify included components before ordering.\u003c\/p\u003e\n\u003cp data-start=\"6220\" data-end=\"6276\"\u003e\u003cstrong data-start=\"6220\" data-end=\"6276\"\u003eIs this the same as a complete solar heating system?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp data-start=\"6278\" data-end=\"6444\"\u003eNo. This is the solar control only. It does not include solar panels, plumbing, sensors unless specified, valve actuator, pump, or additional installation components.\u003c\/p\u003e\n\u003cp data-start=\"6446\" data-end=\"6491\"\u003e\u003cstrong data-start=\"6446\" data-end=\"6491\"\u003eIs professional installation recommended?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp data-start=\"6493\" data-end=\"6671\"\u003eYes. Installation requires proper wiring, sensor placement, actuator connection, solar plumbing coordination, and system setup. Professional installation is strongly recommended.\u003c\/p\u003e","brand":"Hayward","offers":[{"title":"Default Title","offer_id":52762811695414,"sku":"HPPGL235 -H","price":375.38,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0873\/1167\/9798\/files\/HPPGL235_0_a53d1bb4-ae26-4041-997d-fd2dd78b54a7.jpg?v=1755535605","url":"https:\/\/poolsupplydepot.net\/products\/haywardaquasolarpoolcontrolwithlowvoltageoutputgl235hppgl235","provider":"Pool Supply Depot","version":"1.0","type":"link"}