Current have 16x Jinko Solar 320Watt panels connected as a single string with Infini 10KW inverter (MPPT Range: 400V - 800V).  I wanted to add a 2nd string of 535W panels but because of limited roof space, need to remove some of the older 320w panels. Looking at the MPPT range, what's the shortest I can make the original string? I'd like to add as many 535W panels to maximize power generation. What's the min number of 535W panels I need for new string?

10 535w panels are the minimum for the 2nd string max 15 panels. For the 320w Max 17 Min of 11.

Just now, Irocmaster said:

10 535w panels are the minimum for the 2nd string max 15 panels. For the 320w Max 17 Min of 11.

Did you calculate this manually? I've been trying to find an online calculator or app that I can use to figure this out?

Yes manually, calculate the max open circuit voltage of the panels in series and must less than max Pv voltage on the inverter.(800V) Now calculate the VMP( max power point voltage of the panel) and this must be more than the PV minimum of the inverter. (400V)

2 minutes ago, Irocmaster said:

Yes manually, calculate the max open circuit voltage of the panels in series and must less than max Pv voltage on the inverter.(800V) Now calculate the VMP( max power point voltage of the panel) and this must be more than the PV minimum of the inverter. (400V)

http://www.solardesigntool.com/components/module-panel-solar/JA-Solar/6727/JAM72S30-535-MR/specification-data-sheet.html;jsessionid=A32776EFBEC0A5D47A0421A995CF9595

https://static.csisolar.com/wp-content/uploads/2020/10/29111634/CS-Datasheet-BiHiKu7_CS7N-MB-AG_v2.1_EN.pdf

What about these panels, these are Canadian solar 645W Bifacial. With only 16 of these I can reach 10KW on a single string. The datasheet though has different voltages, one without any bifacial gain and then separate set with bifacial gain. Can you guide me how to calculate min and max string size with these panels?