Rounding on Total Energy Cost doesn't work

[tom_l]

You are trying to round a string (word). It needs a number.

{{ states('sensor.house_total_active_energy_cost') | float | round(2) }}

You should also think about adding default values in case the state is unknown.

Updating Templates with the new default values in 2021.10.x

I keep seeing the same question about the new default argument for the templating. This post will cover all possible ways to define default. All the methods that were changed: acos as_timestamp asin atan atan2 cos float log round sin sqrt strptime tan timestamp_custom timestamp_local timestamp_utc Each of them have the exact same default functionality but a different number of arguments. There are multiple ways to use these functions, and this is where all the confusion lies. Understandi…