To be clear, the law is such that you can't use any of the electricity you generate while it's still "yours." You have to first sell it to TVA (and get paid X) and then buy it back from TVA (and pay X+Y.) In other words, you have to pay $Y to use your own electricity.

That's not what the linked article says. The linked articles says that if you want to feed the grid, you're only going to get wholesale prices, while having to pay retail for the energy you consume from the grid. It's a rule of accounting.

If you don't want to eat the premium, don't feed the grid. That is, consume your electricity before it ever hits the meter(s). Presumably the real issue is that typical consumer systems aren't designed to function the way you'd want to avoid the TVA accounting rules.

As Tesla Powerwalls and similar home battery systems become widespread, it will be easier than ever to self-consume the majority of your energy needs.

how can they possibly prevent you from using the current from a solar panel?! are you legally obligated to tie a meter to it that you can't control?

Those regulations (99% sure they're regulations, not laws) apply if you want a grid-tied system. If you are off-grid, you can do whatever you want.

On the other hand, wheat you grow for use on your own farm should offset the cost you pay at retail to buy supplemental wheat.

If you are generating 5kw and using 4kw only 1kw gets sent to the grid. So you are not selling those 4kw at wholesale prices and buying it back at retail. Only the power that is time shifted gets this treatment.

You are free to buy batteries to do your own shifting. Also remember that wholesale costs typically just account for power generation, while retail costs also account for grid maintenance. An owner with solar is benefiting from grid maintenance, so it makes sense that they contribute.

Now from a societal perspective you may want to subsidize solar. But it certainly isn't "unfair" to buy power at wholesale and sell it at retail.

Unfortunately this is not the case! TVA has a "sell all buy all" rule, that if you are connected to the grid and generate 5kw, you are required to sell all of those 5kw to the grid (at wholesale price). Then you buy back the 4kw you use (at retail price). It doesn't matter if you were only using your own generated power, you still pay. Crazy! I didn't believe it the first time I read it either, but that is really the law they adopted.

All the rule does is prohibit net metering. If you never sell your power on the grid it's irrelevant. So you're free to use your 4kw directly.

Presumably this is a hassle because most equipment is designed for net metering where the system is setup to feed all generated capacity to the grid and consume all energy directly from the grid. So without net-metered billing, to avoid paying the retail premium you'd probably need a very expensive system that eliminates the cost effectiveness.

In fairness, AFAIU most utilities despise net metering. From their perspective they're the ones getting screwed, and the TVA billing system more fairly compensates them for infrastructure costs.

Even crazier. In France, the setup is similar: you sell all your energy to EDF, and they sell it back to you. I don't know if that's still the case, but a few years ago, the KWh you pay to them was cheaper than the KWh you sell.

If the selling and the buying happens at different times, then that doesn't seem so crazy. The real cost of electricity is dependent on supply and demand - which varies with time.

In certain parts of USA demand is especially high when the sun is at it's peak and most places on earth see low demand in the middle of the night.

According to the link sent by eppp TVA doesn’t allow net metering.

Edit: I got the terminology wrong. I agree that expecting net metering (“free” time-shifting) is not reasonable. And it seems that in addition to the “sell all, buy all” solution it is also possible to sell (or buy) only what remains after (or is required for) local consumption. https://www.tva.gov/Energy/Valley-Renewable-Energy/Dispersed...

Net metering is not the same thing as only paying for what you use. Net metering means you could push 4 kWh during the day and draw 4 kWh overnight and get metered as zero consumption from the grid. This pushes a storage and distribution cost onto the utility and its other customers. Paying you at wholesale for the daytime push and charing you at retail for the nighttime draw moves those costs back to you.

What others are saying above is that you could generate 4 kWh during the day and consume it on premises, i.e. with air-conditioning or other day time appliance use, and still have zero consumption from the grid. This is also the point of the powerwall and any other on-premises energy storage.

That's true when you're using the power as you generate it, but when you sell it back to use later, you're essentially buying power storage. Efficient power storage is harder than efficient wheat storage, so they're not very comparable.