Not enough interconnect
High loses in transmission
No one needs the energy in the times it goes negative, unless you’re a 1/4 planet away
Unfortunately electric cars only make the peaks and valleys more pronounced. What we need is electric cars to be required to charge the grid during high demand and only charge during very low demand. The chargers need to be smart and integrated with the grid operator
>>486sx3+(OP)
The explanation is lack of interconnect, not losses in transmission. If you have enough capacity to transfer electricity the prices will be equal in two neighboring electricity markets.