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<blockquote data-quote="Skipper" data-source="post: 560162" data-attributes="member: 38292"><p>That is exactly correct. You can hang a fair bit more off them, and providing the string remains within the maximum *voltage* rating of the MPPT, you are fine. The MPPT is simply a buck converter, it can adjust the current being drawn from the string to maximie the power, but it can also reduce the current being drawn and let the voltage rise if the output reaches the maximum permissible current for the string. </p><p></p><p>You only need to peruse the documentation for most inverters to confirm this is true, the Solis 4.6k I am looking at for example has a recommend max PV array of 8kW ... providing you stay within the max PV voltage of 600V you really could put *any* size array on it, it will just adjust the PWM ratio of the buck converter to not draw more than the max rated string current.</p></blockquote><p></p>
[QUOTE="Skipper, post: 560162, member: 38292"] That is exactly correct. You can hang a fair bit more off them, and providing the string remains within the maximum *voltage* rating of the MPPT, you are fine. The MPPT is simply a buck converter, it can adjust the current being drawn from the string to maximie the power, but it can also reduce the current being drawn and let the voltage rise if the output reaches the maximum permissible current for the string. You only need to peruse the documentation for most inverters to confirm this is true, the Solis 4.6k I am looking at for example has a recommend max PV array of 8kW ... providing you stay within the max PV voltage of 600V you really could put *any* size array on it, it will just adjust the PWM ratio of the buck converter to not draw more than the max rated string current. [/QUOTE]
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