Right now they're basically a hack to achieve net metering, which means that the grid maintenance and capital costs of the grid's power production will fall dis

Right now they're basically a hack to achieve net metering, which means that the grid maintenance and capital costs of the grid's power production will fall disproportionately on users not able to afford the systems. There'll eventually be a correction as storage ramps up (and this makes the payback calculations unreliable). Either connection fees will make up a significantly higher percentage of a bill, or owners of the systems will need to pay for power like commercial properties do with dynamic pricing.