Yes, Gary, you found the right LG panels. The production process generates a distribution of power levels per panel with corresponding efficiencies. They sort panels by power and offer them at higher prices for the highest efficiencies. We may opt for 310W panels if the price is significantly less. We are expecting to pay less than $1 per watt.
My first panels installed in 2010 were 13% efficient and about $5 per watt IIRC. 18/13 = 38% more production per sq ft.
LG claims the Neon 2 panels also do better at off-axis angles because they capture some energy that reflects off the rear surface of the cells.
Inverters have improved as well. In 2010 I paid list price of $3.5K for 3kW Fronius inverter without network connection. We have not gotten quotes yet, but I expect to pay a lot less for a 5kW SMA inverter with two independent MPPT inputs, networking, and a special feature that you can use to power a refrigerator during daylight hours while the grid is down.
Boomer, I may be interested in attending the BMW electric lunch event, but when I Googled it the link I found didn't seem to lead to registration.
The link on the BMW thread was:
For show and tell tomorrow I will bring my scale drafting drawing of my planned solar array addition.