Steve we used Enphase micro inverters and went with Anapode Solar...The owner Ken is really good at tech support and trouble shooting. He uses basic Canadian Solar Panels and M250 micros. The kit includes just about everything you need.
Our total was about 13k...but that is not after the tax credit. So it was down to 9100$ after the tax credit. Now realistically a comparable system would have been about 20k or more installed.
An electric car uses roughly 13-16KWH to charge...that's likely going to require a twenty killowatt system for household use and charging a car that's like 30-40 panels...
But you can simply use less to charge. I don't think electric cars are practical just yet. Now with basic electric needs, you could take a 3.5kw system, that would be under powered but it will cut the electric bill 50 percent and get a quicker rate of return.
You've really got to look at how many KWH killowatt hours you use per year and size the system on that, but it should be sized about 10-30 percent bigger depending on modules.
The electrician charged about 1200$ to tie it all in but we did everything else.
If the roof is walkable, DIY is the way to go...either be it Solar Edge or Enphase, those are the top two producers.
Enphase as a company is likely going under, so i hope the stuff lasts, but the warranty is third party supported. Solar Edge...is nice if you want to oversize the system and is a bit cheaper.
I like my invidual panel monitoring via the web...both companies offer that.