Rail freight: $160 / ton per 1,000 miles. At 220 Wh/kg a ton of batteries is 200kWh. So rail costs $800 per MWh per 1,000 miles without considering the cost of the batteries themselves.
You probably don’t want to use regular batteries for that. I’d go with shipping energy as aluminum or something like that and use aluminum-air batteries. But regular hvdc seems really hard to beat with shipping of any kind.
Transmission: $41.50 per MWh per 1,000 miles. https://docs.nrel.gov/docs/fy22osti/81662.pdf
Rail freight: $160 / ton per 1,000 miles. At 220 Wh/kg a ton of batteries is 200kWh. So rail costs $800 per MWh per 1,000 miles without considering the cost of the batteries themselves.