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Green Renewable Energy Forum
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Hi and a solar controller question
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<blockquote data-quote="binky" data-source="post: 509108" data-attributes="member: 490"><p>OK, I mostly work with 240V grid tied inverters. All of these have a minimum voltage at which they start working, like 90V. Now I noticed you say you've tried several 30A MPPT controllers, your panel will only be outputting about 8A. Now, the only controller I can find that states minimum voltage is a Victron unit, which works from 15V , cheap chinese stuff may require a higher voltage than that? Once running the stalled voltage of the panel will drop as the controller tries to find the optiumum voltage / ampage balance to maximise power output (MPPT means Maximum Power Point Tracker.) So maybe I'm wrong, but perhaps your single panel isn't man enough to get the charger controller working? If your multimeter has DC amp setting check how many amps you are getting from the panel. It might also be just that the panel is knackered. </p></blockquote><p></p>
[QUOTE="binky, post: 509108, member: 490"] OK, I mostly work with 240V grid tied inverters. All of these have a minimum voltage at which they start working, like 90V. Now I noticed you say you've tried several 30A MPPT controllers, your panel will only be outputting about 8A. Now, the only controller I can find that states minimum voltage is a Victron unit, which works from 15V , cheap chinese stuff may require a higher voltage than that? Once running the stalled voltage of the panel will drop as the controller tries to find the optiumum voltage / ampage balance to maximise power output (MPPT means Maximum Power Point Tracker.) So maybe I'm wrong, but perhaps your single panel isn't man enough to get the charger controller working? If your multimeter has DC amp setting check how many amps you are getting from the panel. It might also be just that the panel is knackered. [/QUOTE]
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Green Renewable Energy Forum
Solar PV Forum
Hi and a solar controller question
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