ᐅ DHW Tank – Heat Loss per Hour/Day

Hello everyone, I wanted to ask how much temperature your domestic hot water storage tanks lose per hour, etc.

We have a 300-liter (79 gallons) tank located in the basement.

Night: 10:30 PM 45.6°C (114°F) - 5:30 AM 42.5°C (108.5°F) -> 3°C (no usage)
Day: 7:30 AM 47°C (117°F) - 5:30 PM 41.7°C (107°F) -> 5°C (low usage)

Since it is heated by the heat pump once a day in my case, the temperature drops by a maximum of 6 degrees Celsius (from 50 to 44) within 24 hours. This includes one shower use.

Do you have a circulation system?
Characters missing

Circulation is available. From 10 p.m. to 6 a.m. off
From 6 a.m. to 10 p.m., it runs every 30 minutes for 10 minutes each time

Can you shorten it further?