Watt do you mean? Watt minute, watt hour data is the holy grail of battery performance measurement BFL13. Watt hour discharge. Watt hour charge acceptance. Usually expressed as a decimal portion of a kWh or multiples. Sort of like comparing fuel consumption in grams per second and then correcting to kilometers per liter.
When one "major" psychocharger manufacturer replied "huh?" to a simple question of max potential kWh generation during bulk, I smiled and wished him a nice day. Sort of like asking a Border Collie about DNA synthesis.