That's great in places where the grid is required to take your excess power at rates similar to what you will end up paying at the times you may want to buy it back.
On the contrary. Any form of net-metering makes batteries a hopeless situation.
Lets say you use net-metering, and it returns power at less than HALF of "off peak" levels. Lets say you're paying absurd California prices, of 40-cents kw-h at peek, and 10-cents at non-peek. And then you only manage to sell power back at 4-cents.
IIRC, these numbers are somewhat close to California numbers. Mind you, Virginia has 9-cents peek and 1-cent off peek. So... California prices are about as good as it gets for batteries.
Well, lets see here... first off all, you don't pay peek anymore. Because your solar panels are active between 11am and 4pm. Lets say you're selling it back at 4-cents. So you're paying in essence... 6-cents for nighttime power through the net-metering system (for every kw-h stored in excess by your solar panels)
You need to use 58333 kw-h before you break even with Tesla's $3500 battery (not counting inverter costs or installation costs). Considering that the battery has a capacity of 7kw-h, that is 8333 cycles or 22-years.
Unfortunately, the Tesla Battery Pack only has a 10-year lifespan. So you've lost money in the long run.
Not counting inefficiencies in the battery, inefficiencies in the inverter or installation costs.
Comments
On the contrary. Any form of net-metering makes batteries a hopeless situation.
Lets say you use net-metering, and it returns power at less than HALF of "off peak" levels. Lets say you're paying absurd California prices, of 40-cents kw-h at peek, and 10-cents at non-peek. And then you only manage to sell power back at 4-cents.
IIRC, these numbers are somewhat close to California numbers. Mind you, Virginia has 9-cents peek and 1-cent off peek. So... California prices are about as good as it gets for batteries.
Well, lets see here... first off all, you don't pay peek anymore. Because your solar panels are active between 11am and 4pm. Lets say you're selling it back at 4-cents. So you're paying in essence... 6-cents for nighttime power through the net-metering system (for every kw-h stored in excess by your solar panels)
You need to use 58333 kw-h before you break even with Tesla's $3500 battery (not counting inverter costs or installation costs). Considering that the battery has a capacity of 7kw-h, that is 8333 cycles or 22-years.
Unfortunately, the Tesla Battery Pack only has a 10-year lifespan. So you've lost money in the long run.
Not counting inefficiencies in the battery, inefficiencies in the inverter or installation costs.