I see no logic in this: Generate energy at home, transfer it to the grid. Get paid. Buy this hugely expensive garage ornament gadget. Spend a small fortune and see no return on investment.
Bit like the depreciation on a Mercedes these days...
Mind you Lithium Ion battery might warm your garage in, shall we say, unexpected ways. Ask Boeing...

Home owners want batteries to cut the cord from the grid.
They don't want batteries to prevent seldom (2 hours / year?) power outages.
Get with it.

And so it begins... Look for the grid to become antiquated within 10 years.

Fast forward to when solar can produce 100% of power need up till about 5 PM. The highest demand of the day is in the evening as the sun fades and before people head off to sleep.
On the backend this means Utility companies have to have hundreds fossil fuel based energy production plants at the ready as millions of solar panels shut off at the same time as demand climbs. After only a 4 hour burst of demand many people head to sleep and several of the plants can be brought offline again.
Fossil fuel based production plants tend to be best suited to running 24/7 dealing with stable loads so the cost per kwh for a coal plant that only comes online to deal with a 4 hour load and be shut back down would be pretty high. Storage is the most suitable solution and right now lithium ion seems to show the most promise.

Milton, many homeowners want a reliable alternative to a generator.. People living in storm zones will need an alternative power source for days to weeks at a time. Small generators can be used to provide recharge capabilities while using far less fuel that a conventional gen-set.

snave, different needs call for different chemistries. Some chemistries genrerate more heat, others less.

Another small, but significant step has been taken. We're moving to more local energy generation and storage.

Homeowners want alternative power source capable of providing power for as little as a couple of hours and as long as a few days. Batteries will run down eventually, but a small generator could keep the batteries topped off while using substantially. It is the reason why you can still have a working landline telephone when power is out.

@Noel K Frothingham. Landline phones under POTS were powered by the network but with ADSL and fibre this is no longer the case so power is required to have a functioning landline.

Great, if every home owner wants their own battery bank capable of running their home, along with the PV, wind and no doubt back -up fossil generator, the total CO2 lifecycle and resource allocation challenge goes wildly off the sustainability meter. EROEI goes well below what would be needed to keep 10 billion folks alive without stripping the planet. No thanks. Give me a nuclear based conventional grid, I'll charge the car at nite and keep a gennie for the rare outage.