Firstly a household with solar which does not feed anything back is not the same as someone who uses the same amount of power without solar.
False. It's exactly the same.
The demand curve for one of the households is more smooth
False. You've never actually looked at household electricity demand minute by minute, have you? Load fluctuations *vastly* exceed the fluctuations caused by solar panels. Those high transitory startup loads are the bane of the grid manager's existence...
I'm planning to install on-demand (tankless) hot water. This is a *brutal* load fluctuation, much worse than normal load fluctuation, and much much worse than the fluctuations caused by solar panels. It would be reasonable for the utility to charge me more because of this. NV Power doesn't charge extra fees to people with these systems. Which shows that their extra fee for people with solar is *just a matter of attacking solar*.
I don't know why you are using this example though, didn't you say that only the households that used net metering would be affected by the price increase?
It's not clear that it's possible/legal to install solar panels in Nevada without subscribing to net metering. Maybe it is, but I couldn't find any documentation saying that they'd authorize connection of solar panels with a circuit preventing them from feeding energy to the grid.
Look at what Spain did; they made it illegal to install solar panels without feeding the grid. (In Europe, there are apparently now quite a lot of illegal "plug-in" solar panels showing up. So it's not really possible to effectively prohibit them, but the utility company can cause a lot of trouble if they catch you. Spain's government, on behalf of its utility companies, was threatening to send the police door to door to look for unauthorized solar panels. Seriously.)
I have been trying to figure out whether NV Energy will allow you to connect them, and I can't find any documentation that they will allow it. I suspect the worst.
By contrast, in Hawaii there are now very clear rules for installing solar panels without net metering, which don't feed back to the grid. (Go Hawaii!)
There is a potential long-term issue with net metering. Faced with this issue, *decent* utility companies have done some of the following things:
(1) raised basic connection charge for everyone
(2) proposed residential peak demand charges (note, this catches the on-demand hot water users -- as it should)
(3) proposed net metering on an "hour by hour" basis (so you can't offset night usage with day usage) -- this is the Maine proposal
All of this is fine. NV Power instead proposed a punitive scheme to attack people with rooftop solar.