Just wanted to follow up. Had the opportunity today to check one of our string inverter systems with Tigo optimisers. This is a 16 panel system using 340-watt panels connected to Tigo optimisers on 2 MPPT fed into a Kaco 5kw string inverter. Maximum production of this system is running at 31 KW on the best days, most days around 25 - 27 KW. No shade issues Southern Exposure panel angle 3 degrees (the advantages of a flat roof and no obstructions). In comparison we have a number of 12 panel systems (same area, same conditions, same panel angle) using Enphase IQ7+ micro-inverters and 375-watt panels. Total calculated potential output - 16 panels - 5440 watts, 12 panels 4,500 watts. Peak production - string inverter (daily output) 31 kilowatts. Peak production - micro-inverters (daily output) 30 kilowatts. Average daily output - String inverter - 24 - 25 kilowatts. Average daily output micro-inverters - 25.5 kilowatts. Remember these are micro-inverter systems that are 940 total watts smaller than the string system (with optimisers) and they are averaging the same or higher daily output.