{"product_id":"aquasolar-control","title":"Hayward AquaSolar Control","description":"\u003cp\u003eThe Hayward GL-235 AquaSolar is a dual differential control for solar heating of pools, spas and hot tubs. It decides when the solar panels are worth using and manages the system from there.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow differential control works\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eA solar panel is only useful while it is hotter than the water. The control reads both temperatures and calls for solar when the difference is in your favor, then stops when it is not. Without that logic a solar loop happily pumps water through cold panels at dusk and cools the pool it was meant to heat.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eThe rest of the feature set\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eA selectable high limit caps how warm the water gets, so the system stops adding heat at your chosen temperature instead of running all afternoon. Freeze protection is programmable, which matters anywhere a night can drop below freezing with water sitting in the panels. Automatic nocturnal cooling runs the loop after dark to dump heat, which is the fix for pools that overheat in hot climates.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhere it fits\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThe same control is used on pools, spas and hot tubs, so a single unit handles most residential solar installations.\u003c\/p\u003e","brand":"Hayward","offers":[{"title":"Default Title","offer_id":48627567984852,"sku":"GLD-30-0065","price":357.68,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0801\/9568\/2516\/files\/default_b933e9c9-a2c3-49df-8ced-48e4aa1ea2a8.jpg?v=1788723724","url":"https:\/\/www.activepoolsupply.com\/products\/aquasolar-control","provider":"Active Pool Supply","version":"1.0","type":"link"}