{"id":5232,"date":"2020-03-22T12:28:30","date_gmt":"2020-03-22T16:28:30","guid":{"rendered":"https:\/\/ncocra.org\/WordPress_v1\/?p=5232"},"modified":"2020-03-23T10:58:24","modified_gmt":"2020-03-23T14:58:24","slug":"5232","status":"publish","type":"post","link":"https:\/\/ncocra.org\/WordPress_v1\/2020\/03\/22\/5232\/","title":{"rendered":"From the Land of Magic – Solar Panel Load Controller"},"content":{"rendered":"

From the Land of Magic! a high tech solar panel load controller, built for son Pete. You can see that the latest components and construction methods are employed.<\/p>\n

There’s a differential amp that drives an Ebay PWM speed controller ($11) to load the panels to their max power voltage, regardless of the insolaton<\/strong>* level. A sample of the panel voltage is compared to a Zener reference to generate the control signal to the PWM unit.The load is a 4500W water heater element in a tank in front of his regular water heater. There are three 235W panels with 29.4 V max power voltage.<\/p>\n

I had a great talk with a dealer recently. It seems that PV power is now cheaper than heating water directly with wet panels. Cheaper panels and good inverters seem to have made a big difference.<\/p>\n

Wilson, W4BOH<\/p>\n

insolation*<\/strong> – No that’s not a mispillin’\u00a0 Insolation<\/b>‘ is the solar radiation (power\/Unit Area) that reaches the earth’s surface, which average high sun is close to 1KW\/square meter.<\/span><\/span><\/em><\/h3>\n

\"\"<\/p>\n

Controller Schematic<\/h1>\n

\"\"<\/p>\n","protected":false},"excerpt":{"rendered":"

From the Land of Magic! a high tech solar panel load controller, built for son Pete. You can see that the latest components and construction methods are employed. There’s a differential amp that drives an Ebay PWM speed controller ($11) … Continue reading →<\/span><\/a><\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[16],"tags":[],"class_list":["post-5232","post","type-post","status-publish","format-standard","hentry","category-projects-homebrew-hamshack"],"acf":[],"_links":{"self":[{"href":"https:\/\/ncocra.org\/WordPress_v1\/wp-json\/wp\/v2\/posts\/5232","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/ncocra.org\/WordPress_v1\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/ncocra.org\/WordPress_v1\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/ncocra.org\/WordPress_v1\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/ncocra.org\/WordPress_v1\/wp-json\/wp\/v2\/comments?post=5232"}],"version-history":[{"count":10,"href":"https:\/\/ncocra.org\/WordPress_v1\/wp-json\/wp\/v2\/posts\/5232\/revisions"}],"predecessor-version":[{"id":5243,"href":"https:\/\/ncocra.org\/WordPress_v1\/wp-json\/wp\/v2\/posts\/5232\/revisions\/5243"}],"wp:attachment":[{"href":"https:\/\/ncocra.org\/WordPress_v1\/wp-json\/wp\/v2\/media?parent=5232"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/ncocra.org\/WordPress_v1\/wp-json\/wp\/v2\/categories?post=5232"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/ncocra.org\/WordPress_v1\/wp-json\/wp\/v2\/tags?post=5232"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}