Continuing my habit of learning something new after I make expensive decisions on what I think I know...
I have seven arrays of 7 x LG440N2T-E6 bifacial panels in series, with each array connected into a tracker of two MPPT RS 450/200 units.
When I sized the arrays, then designed ground mounts & had them engineered & sent to a metal fabricator, I had sized the arrays based solely on this calculation:
VOC * 7 * 1.23 (my temp correction) = 423V = less than 450V = good to go
Now I see that my PV string cannot be more than 8 x the minimum battery voltage when at float.
My batteries are Pylontech US5000. The float value I see in the Compatibility Guide is 51V. Does this mean my arrays cannot exceed a VOC of 408V?
The VOC of my panels is, I think, 48.9V. 48.9 x 7 = 342.3V.
342.3 is less than 408V so I think I am good here and can use strings of 7 panels?
Or did I do my string VOC calculation incorrectly by not including a temp correction? Because if I use my temp correction, then my string VOC is 421V which is more than 408V, so I may have an issue. Many thanks for any help!