gisywaterboy 3 Posted November 4, 2020 Share Posted November 4, 2020 Hi All, Just a simple question, is there any reason why I couldn't run a VSR off my solar panel so that when the house bank is charged the solar starts charging the start battery? I already have a VSR running off my alternator that charges the start battery primarily, then the house. It is a simple system on a 9m yacht, 50w solar panel. Thanks heaps, any advice deeply appreciated. Quote Link to post Share on other sites
Island Time 1,211 Posted November 4, 2020 Share Posted November 4, 2020 If the one you have is a dual (senses batt voltage either side) then you already have that. If not, just update it to a dual model, and your good to go. The VSR does not care what provides the voltage, once the set voltage is reached, it will engage and connect batts together. Once together, current can flow in either direction, the VSR is not a blocking device. Quote Link to post Share on other sites
gisywaterboy 3 Posted November 4, 2020 Author Share Posted November 4, 2020 Ok, Thanks Island time, I didnt realise that the VSR didnt care which battery had reached voltage before engaging. I will test mine out with a standard battery charger, if it works I can rewire so the VSR is upstream of the battery switches. Cheers. Quote Link to post Share on other sites
Island Time 1,211 Posted November 4, 2020 Share Posted November 4, 2020 Some models sense only one side - you need a dual, but yes, battery fuses then the VSR , THEN the batt switches... Quote Link to post Share on other sites
2flit 52 Posted November 6, 2020 Share Posted November 6, 2020 The other option would be a dual battery solar charge control. A very good brand name is Morningstar https://www.morningstarcorp.com/products/sunsaver-duo/ however, the amperage is more that you need and the cost is high. There are much less expensive ones on Amazon, but I have no experience with the quality of that gear. Quote Link to post Share on other sites
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