Are charge and discharge values from the app accurate?

I have used the gloomy January to check charge and discharge values from the phone app which are displayed by pressing the battery symbol inside a circle. Lack of sunshine meant that no solar charging complicated things...
The app indicated charge and discharge values of over 18kWh from 4% to 100% which seems strange because I have two 8.2kWh 100% batteries that are nearly 4yrs old. They were installed in July21 along with my Gen1 AC3.0.
Since we recently installed a heat pump, the batteries are regularly cycled but don't seem to have lost any capacity?
Similar values are displayed on the monthly report.
Any comments, please?

wrefordj I'd go off what the meter details tabs say.
The portal dashboard stuff has a habit of summing up every 5 min reading, which if you have spikey loads can make it look like it took your kettle 5 mins to boil and so on....

hoggy Thanks hoggy. Since the initial guaranteed capacity was 16.4kWh, I was surprised by 18 after nearly 4yrs.