Sonnet 4.5 gave me this: Now let me calculate whether your configuration will work. I need to determine the cold weather voltage to ensure it stays within the

Sonnet 4.5 gave me this: Now let me calculate whether your configuration will work. I need to determine the cold weather voltage to ensure it stays within the inverter's 600V maximum. Panel specs I found: Voc (STC): 39.61V Vmp: ~33.5V (estimated based on typical ratio) Imp: ~13.1A (440W / 33.5V) Critical issue: Temperature coefficient The PS440M8GFH likely has a Voc temperature coefficient around -0.25% to -0.30%/°C (typical for N-Type TOPCon panels). Let me use -0.27%/°C as a conservative estimate. Your configuration: 2 strings × 4 panels = 8 panels total String voltage at STC: 4 × 39.61V = 158.44V Cold weather calculation for upstate NY: Upstate NY can see extreme lows of -20°F to -30°F (-29°C to -34°C). Using -30°C as worst-case: Temperature difference from STC: 25°C - (-30°C) = 55°C Voltage increase = 39.61V × 0.27% × 55°C = 5.88V per panel Cold weather Voc per panel = 39.61V + 5.88V = 45.49V String voltage at -30°C: 4 × 45.49V = 181.96V Analysis: Max voltage: 182V << 600V - Safe, plenty of margin MPPT range: 182V is within 120-500V - Will track properly Current: 13.1A << 25A per MPPT - No problem However, there are concerns: You're only using 182V max when the inverter can handle up to 500V MPPT range. This is inefficient - you're leaving significant wire sizing benefits on the table. With 600V max, you could run 12-13 panels per string instead of 4. Power utilization: 8 × 440W = 3,520W total, but you have 12kW of PV capacity available (15kW recommended max). You're using less than 30% of the inverter's solar input capability. Each string on separate MPPT wastes one tracker - both strings are identical orientation/shading, so they'd perform identically. Will it work? Yes, safely. Is it optimal? No.