A little more on the HI Net Metering roll-back. Unlike NV, all existing Net Metering for HI is grandfathered, but the new options are interesting for suggesting what the future might bring for the rest of us over time.
HI has the highest solar penetration of any state, so they are the bleeding edge. The high penetration is very understandable, with retail rates of $.30/kWh, and wholesale rates of about $.15/kWh, a consequence of generating most of their power from imported diesel fuel. Apparently the separate grid on each island is too small to justify coal generation, and for the quantities they need, diesel, being more energy dense, is cheaper to transport than coal. The utility publishes maps of the penetration. Here is Oahu DG (Distributed Generation) relative to first minimum load, and then maximum load, for each circuit of a few hundred customers. Notice the high ratios.
The utility is offering a "fast-track" option that will win quick approval, but which offers zero compensation for exported power. They realize this will not be popular without affordable batteries.
More interesting for the immediate future is their other option, which will pay the wholesale rate for each kWh exported to the grid, but this payment is capped at the level of the customer's total imported power for the month. Any additional production for the month is forfeited to the utility. To see how this works, suppose the customer is able to arrange for 1/3 of his or her consumption to occur during the daytime, behind the meter. The remaining 2/3 of his consumption will cost $.30 - $.15 = $.15/kWh, and building more solar won't help because you would just hit the cap sooner. So the best you could achieve is to reduce your retail bill by 2/3. You have the additional limitation that since you can't roll over credits to future months, you can't average out production across the seasons. This is probably more tolerable in HI than in most other states, since their seasons are mild. However, I would think there might well be some seasonal variation in cloud cover.
Of course an EV owner would charge the EV during the day behind the meter as much as possible. If the car is used for commuting, this would be possible only on weekends. In this case one could envision owning two LEAFs, and charging each at home on alternate days.