On freight right now, air has currently $13/kg, where June it was ~$3.25/kg, and is about a 14~17 day time frame. Fast boat, 40' container used to be about $4.5k for a 40', it is not about $22kI thought the $1000 Mason promotion expired on Oct. 10. There appears to be a cluster of reports that shipping a rack mount batt to USA is in the $400-$500 per unit range. With a large quantity I'm assuming Signature Solar pays less than that on a per unit basis.