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PV string voltage differences
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<blockquote data-quote="binky" data-source="post: 555139" data-attributes="member: 490"><p>General rule if thumb, if it's working there's nothing wrong! </p><p></p><p>Your south array will always outperform your west array, especially in this gloomy weather we have been having recently. The MPPTs adjust voltages down from Voc to increase ampage and maximise power from the arrays. A simple test you could try is to turn off the AC effectively stalling the inverter, that should then stall the DC so you can see what the stalled voltages are. Ideally you would turn off the DC and test string voltages, but messing with DC is not recommended unless you know what your doing - it's dangerous stuff <img class="smilie smilie--emoji" loading="lazy" alt="⚡" title="⚡" src="https://cdn.jsdelivr.net/joypixels/assets/8.0/png/unicode/64/26a1.png" />.</p><p></p><p>I'm not sure what would happen if 2 panels had been cross connected, but I suspect that string would be down by the equivalent of 4 panels, or just not work.</p></blockquote><p></p>
[QUOTE="binky, post: 555139, member: 490"] General rule if thumb, if it's working there's nothing wrong! Your south array will always outperform your west array, especially in this gloomy weather we have been having recently. The MPPTs adjust voltages down from Voc to increase ampage and maximise power from the arrays. A simple test you could try is to turn off the AC effectively stalling the inverter, that should then stall the DC so you can see what the stalled voltages are. Ideally you would turn off the DC and test string voltages, but messing with DC is not recommended unless you know what your doing - it's dangerous stuff ⚡. I'm not sure what would happen if 2 panels had been cross connected, but I suspect that string would be down by the equivalent of 4 panels, or just not work. [/QUOTE]
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