[RWebb]

John - your utility can point you to insolation per month - you need to get your own particular site analyzed for trees, etc. - several places do that here for free (in the hopes you will get them to do the install) & there must be many such places in PDX

It can be done DIY fashion, but requires some equipment and labor.


also - within 30 years you may well want to upgrade to a future panel, tho the rest of the installation could remain