2 ms·
The grid, even if its your connection between your mains and your car, needs to be set up to limit the output of the car's batteries. Or the car (powerwall, etc
by Johnny555 4y ago
The grid, even if its your connection between your mains and your car, needs to be set up to limit the output of the car's batteries. Or the car (powerwall, etc) does.
Yes, and it does have those limits in place for charging, some in software (by the EV charge controller telling the car how much power it can use), some hardware (through at least 2 circuit breakers). Why wouldn't the same limits be enforced if using the car for grid storage?
Why does the max power output of a car battery have any bearing on whether it can be used for grid storage?
- falcolas 4y agoBecause batteries can pump out magnitudes more power in a very short amount of time than solar. The two are not comparable. But ultimately, what speaks more than anything I could ever say is the requirement for backup power generation (including household battery arrays) requires mains power be cut off before engaging - to prevent damage to the grid.
- Johnny555 4y agoBecause batteries can pump out magnitudes more power in a very short amount of time than solar. The two are not comparable. The batteries aren't connected to the grid directly, the grid can't absorb DC power, it has to go through an inverter. Even if your batteries can supply 500KW of instantaneous power, if they are connected to a 1KW inverter, the most the grid will ever see is 1KW - there's no failure mode that would let a 1KW inverter pump out 500KW of AC power, even for an instant.