Here's a little story from one of the best products, Tesla.
We keep saying to wait if you can. Partly because of the number of dodgy companies trying to push terrible products, partly because of the tech involved needing further development, and, last, but not least, the lack of tradesmen who actually understand them.
Yes, they are the way of the future, but they're also at a similar stage to what solar was in Australia in, say 2008. Many products don't work properly and many manufacturers and installers pretend they do for sales... we started DMC so we could fix the mistakes we saw in the past. Batteries won't always be a mistake, and we are being the devil's advocate, but you do have to really do your homework and don't buy on price...
Hope we've helped someone with this.