There are options to Tesla.
http://aquionenergy.com/homeowners/solar-battery/
https://news.energysage.com/tesla-powerwall-vs-sonnen-eco-vs-lg-chem/
Look, this ain't my gig, so I might be talking nonsense... But from what I gather, and this much I know is true, Solar systems are generally way, way out of the price range of the folks I know that need em. And your second link pretty well proves it.
You have to realize that most of these folks are paying straight out-of-pocket, out of principle first. That is why most of em are checking out and getting off the grid in the first place. It's a self-sufficiency thing. Few of them - VERY few - Have the semolians to lay out the 15k or so that it would take for a robust starter system turn-key.
Most of them spend the money on the panels because winter production by those panels is around half or less what you might get out of them in full summer sun... I don't know the particulars but 6 big panels seems to be the average... And about 6 batteries (four is more likely), which seems to be the barely sufficient start. All they can do, and then they make do. And at that, still a lot of time with the jenny charging what the solar cells can't do.
As time goes on, and they can afford it, that system will be added to as they go...
That is partly strategic too - as portions of the system are older, not as old, and current, making maintenance change-out far more possible that had they bought the whole shooting match at once... Two batteries failing is doable for replacement, whereas the whole system failing at once would be impossible to afford...
Even the tesla car batts (bought used in pairs, around $5k a pair going rate I think) are a burden to afford...
That ability to add-on... the very necessity of building as you go, puts li-ion pretty out of reach.
