You are conflating energy in kWh with storage capacity in kWh, so you are probably off by a couple orders of magnitude. If you had a long haul truck with a batt

You are conflating energy in kWh with storage capacity in kWh, so you are probably off by a couple orders of magnitude. If you had a long haul truck with a battery that can be recharged relatively quickly, it might get recharged a couple of times a day. So you have to multiply its capacity times recharges times number of days in service, so it could be used to store and release 1000x kWh nameplate capacity each year.