They mention one person's cost for a PV system with batteries in the article, it was $14,800. (Look for "Hayashi bought a system with batteries"). It also state

They mention one person's cost for a PV system with batteries in the article, it was $14,800. (Look for "Hayashi bought a system with batteries"). It also states the buyer will be able to recoup his upfront cost in 2 years thanks to tax credits. That doesn't seem too bad.