I'm doing a new installation with Tesla for the Solar Panels and got a few questions for those who have Solars with Tesla 1. SolarEdge vs. Delta Inverter - Originally Tesla said they will be using SolarEdge inverter but after the system design phase, an Delta Solivia 5.2TL inverter is used. Is there a big difference between the two inverters? Is the Delta Inverter still utilizing the power optimizer capability Tesla promised? 2. Power Optimizer part - I was given the part list (with the Delta Inverter) and I do not find any part for the power optimizer. The advisor said the optimizer is now part of the solar panel (Panasonic SC SC325). Though from reading reviews, I was expecting the power optimizer from Solar Edge with part numbers ex: P300 / P400. 3. My system is a 18 panels (325W) - total to 5.85kW. However the inverter proposed were in the 5000W range (Delta 5200, SolarEdge 5000), is that normal to be less than the system max capacity?