Performed job walk for installation of tankless electric water heater. informed customer of how this water heater will work talked to him about bathtub water requirements. this water heater (Electric tankless) will not perform for customers needs. this would not be the style water heater that is recommended. talked to customer about a couple options customer does not want to use gas at all. his only other option would be to do a hybrid electric water heater. Looked at electrical requirements subpanel maxed out main breaker panel maxed out needs electrician to come out and give him options for upgrading panels