Doing a consumption study using BEopt and when comparing a Standard Electric water heater Vs an Electric Tankless water heater there is only 59 kWh difference? They are both being modeled in a 3rd story 2BR apartment. I know that tankless water heaters are way more efficient then what BEopt is saying. Any ideas or tips would be great.

Doing a consumption study using BEopt and when comparing a Standard Electric water heater Vs an Electric Tankless water heater there is only 59 kWh difference? They are both being modeled in a 3rd story 2BR apartment. I know that tankless water heaters are way more efficient then what BEopt is saying. Any ideas or tips would be great.