At least early on, the main beneficiaries of this will be affluent people. That is hard to avoid when you're trying to incentivize a new technology (early adopters usually tend to be wealthier, for obvious reasons), but at least they could have funded this from general state revenue.
But instead they seem to want to get the money from utility customers. That seems like one of the most regressive forms of "taxation" imaginable... pretty much everyone uses electricity, and while bigger households use more, the multiplier will certainly be much smaller than the one for income.
Then there are industrial and commercial customers, for sure, but it seems equally misguided to specifically increase the burden on productive activity (rather than, say, on investment income, whose taxation would contribute to the general revenue).