Switching it off when the panels cool prevents a reversal of the process and loss of heat from the store. Switching the pump on transfers the heat in the panel to the store. The pump is usually switched on when the solar panel is hotter than the water in the store's heat exchanger and off when the panel is colder. The controller's main function is to switch the circulating pump on or off. Power for the controller and the pump can come from a mains electric supply or from a photovoltaic (PV) module. Commercial controllers use a microprocessor usually with a LCD display and simple user interface with a few pushbuttons. The simplest solar controller circuit uses a comparator with two temperature inputs, one at the solar panel and one at the thermal store's heat exchanger, and an output to control the pump. Most commercial controllers display the temperature of the hot water in the store and provide general status information about the system, including overall energy production. Overheat protection is achieved by turning the pump off when the store reaches its maximum temperature and sometimes cooling the store by turning the pump on when the store is hotter than the panels. Heat is available whenever the temperature of the solar panel is greater than the temperature of the water in the heat exchanger. The basic job of the controller is to turn the circulating pump on when there is heat available in the panels, moving the working fluid through the panels to the heat exchanger at the thermal store. Please help improve this article by introducing citations to additional sources.Ī solar controller is an electronic device that controls the circulating pump in a solar hot water system to harvest as much heat as possible from the solar panels and protect the system from overheating. Relevant discussion may be found on the talk page. Help.This article relies largely or entirely on a single source. Please make your preferred cookie selection to continue. ![]() In order to understand how our site is generally used and to make your visit more interesting and personalized, we use cookies and other technologies. You can change your cookie setting at any time on our data protection site.Ĭookies are important for the correct functioning of a website. Cookies are not set with this option, except for technical reasons. The website may not work properly without these cookies. Necessary cookies help to make a website usable by enabling basic functions such as page navigation and access to secure areas of the website. Only accept cookies that are necessary for the function of this site: These are, for example, cookies, which influence the way a website behaves or looks like (eg your preferred language or the region you are in). In addition to the necessary cookies, additional cookies are loaded, which are used by the website operator for this website. Only allow cookies that are set by this website: These are cookies for marketing, statistics and others. These include cookies from external providers, such as Youtube or Vimeo, to allow the playback of videos and cookies, which are not only necessary for the operation of the website. This feature allows all cookies for tracking and page analysis, website personalization cookies or social media services. ![]() You can manage your preferences in the cookie settings and change them anytime.Īttention: If you are not yet 16 years old, please be sure to deactivate all cookies that are not necessary, as cookies must be licensed by children under 16 years of age to have the consent of a legal guardian. We also share information about your use of our website with our social media, advertising and analytics partners in accordance with our privacy policy. In order to understand how our site is generally used and to make your visit more interesting and personalized, we collect information about the use of this site. Cookie EinstellungenWe respect your privacy and privacy.
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